{"id":154232,"date":"2026-08-18T09:01:17","date_gmt":"2026-08-18T09:01:17","guid":{"rendered":"https:\/\/pabau.com\/?p=154232"},"modified":"2026-08-18T15:01:59","modified_gmt":"2026-08-18T15:01:59","slug":"icd-10-code-h463","status":"publish","type":"post","link":"https:\/\/pabau.com\/nl\/diagnostic-codes\/icd-10-code-h463\/","title":{"rendered":"ICD-10 code H46.3: Sequencing toxic optic neuropathy"},"content":{"rendered":"\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"MedicalWebPage\",\"headline\":\"ICD-10 code H46.3: Sequencing toxic optic neuropathy\",\"description\":\"ICD-10 code H46.3 (Toxic optic neuropathy) is a billable diagnosis code for optic nerve damage from a toxic substance. Covers the T51-T65 code-first rule, adverse-effect sequencing for drug causes, documentation requirements, and related H46 codes.\",\"url\":\"https:\/\/pabau.com\/diagnostic-codes\/icd-10-code-h463\/\",\"audience\":{\"@type\":\"MedicalAudience\",\"audienceType\":\"Clinician\"},\"reviewedBy\":{\"@type\":\"Person\",\"name\":\"Dr Vanja Kitanova\",\"jobTitle\":\"Medical Reviewer\",\"affiliation\":{\"@type\":\"Organization\",\"name\":\"Pabau\"},\"knowsAbout\":[\"Medical Coding\",\"Clinical Documentation\",\"Healthcare Billing\",\"Clinical Safety\"],\"sameAs\":\"https:\/\/pabau.com\/blog\/author\/vanja\/\"},\"datePublished\":\"2026-07-09\",\"dateModified\":\"2026-08-18\"}<\/script>\n\n\n        <div id=\"key_takeaways\">\n            <div class=\"header\">\n                                    <img decoding=\"async\" src=\"https:\/\/pabau.com\/wp-content\/uploads\/2025\/12\/Key-Takeaways-Icon.svg\" alt=\"Key takeaways\" height=\"42\" width=\"42\">\n                                <h3>Key takeaways<\/h3>\n            <\/div>\n            <div class=\"list\">\n                                                            <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#3D3D46\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p>ICD-10 code H46.3 is the billable diagnosis code for toxic optic neuropathy. It covers optic nerve damage caused by drugs, alcohol, tobacco, metals, and industrial chemicals.<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#3D3D46\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p>H46.3 carries a code-first note. When the cause is a nonmedicinal toxic substance, the T51-T65 toxic effect code is sequenced before H46.3.<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#3D3D46\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p>Drug-induced cases run the other way. Code H46.3 first, then the T36-T50 adverse effect code with 5th or 6th character 5.<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#3D3D46\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p>H46.3 has no laterality subcodes, so right, left, and bilateral findings all map to the same code. Laterality still belongs in the note.<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#3D3D46\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p>Practice management software like Pabau keeps the diagnosis, the causative agent, and the exposure history in one record. The claim is then built from what the clinician wrote.<\/p>\n                        <\/div>\n                                                <\/div>\n        <\/div>\n    \n\n\n<p class=\"wp-block-paragraph\">ICD-10 code H46.3 is the billable diagnosis code for toxic optic neuropathy. It covers optic nerve damage from a drug, alcohol, tobacco, a metal, or an industrial chemical.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">One tabular note does most of the work here. H46.3 carries a code-first instruction, so the code naming a nonmedicinal toxin sits ahead of it. Read that note backwards and the claim tells the payer a different story than the chart does.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Prescribed medications reverse the order, and that reversal is easy to miss. The cause documented in the chart decides what goes on line one, so start there.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"ICD-10 Revisions: Stay Updated or Fall Behind\" width=\"800\" height=\"450\" src=\"https:\/\/www.youtube.com\/embed\/bqAyb-BCA0w?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 id=\"h-icd-10-code-h46-3-is-billable-and-it-carries-one-note\" class=\"wp-block-heading\">ICD-10 code H46.3 is billable, and it carries one note<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">H46.3 is a billable, specific ICD-10-CM code, so you can report it on a claim. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The FY2026 edition took effect on October 1, 2025, according to the <a href=\"https:\/\/icd10cmtool.cdc.gov\/\" target=\"_blank\" rel=\"nofollow noopener\">CDC\/NCHS ICD-10-CM web tool<\/a>. One tabular note applies. It says code first, not use additional code.<\/p>\n\n\n\n<table style=\"width:100%;border-collapse:separate;border-spacing:0;border-radius:12px;overflow:hidden;font-size:15px;line-height:1.5;margin:1.5em 0 2em;box-shadow:0 2px 12px rgba(0,0,0,0.08)\">\n<thead>\n<tr>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Field<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Details<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Code<\/td>\n<td style=\"padding:12px 16px;color:#374151\">H46.3<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Description<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Toxic optic neuropathy<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Billable\/specific<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Yes, valid for reimbursement<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Code type<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Diagnosis code (ICD-10-CM)<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Effective date<\/td>\n<td style=\"padding:12px 16px;color:#374151\">October 1, 2025 (FY2026 edition)<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">ICD-10-CM chapter<\/td>\n<td style=\"padding:12px 16px;color:#374151\">H00-H59: Diseases of the eye and adnexa<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Block<\/td>\n<td style=\"padding:12px 16px;color:#374151\">H46-H47: Disorders of optic nerve and visual pathways<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Parent category<\/td>\n<td style=\"padding:12px 16px;color:#374151\">H46: Optic neuritis<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Tabular note<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Code first (T51-T65, toxic effects of substances chiefly nonmedicinal as to source) to identify cause<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Laterality<\/td>\n<td style=\"padding:12px 16px;color:#374151\">None. H46.3 has no subcodes for right, left, or bilateral<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">MS-DRG grouping<\/td>\n<td style=\"padding:12px 16px;color:#374151\">123: Neurological eye disorders<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<h2 id=\"h-what-toxic-optic-neuropathy-is-and-what-causes-it\" class=\"wp-block-heading\">What toxic optic neuropathy is, and what causes it<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Toxic optic neuropathy is damage to the optic nerve caused by a toxic substance. The injury usually hits the fibers that carry central vision and color. Vision loss is normally bilateral, and it can build slowly or arrive within hours.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The list of causes runs wide. Coders meet it most often in practices treating patients on long-term antimycobacterial therapy. Industrial and dietary exposures cause the same damage and carry the same code. What changes is the order the codes go in.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Substances documented in the literature include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Ethambutol:<\/strong> the most frequently cited drug cause, used in tuberculosis regimens<\/li>\n\n\n\n<li><strong>Isoniazid:<\/strong> another tuberculosis drug linked to optic toxicity, mostly at high doses<\/li>\n\n\n\n<li><strong>Methanol:<\/strong> acute ingestion can cause rapid, severe damage to both optic nerves<\/li>\n\n\n\n<li><strong>Tobacco and alcohol:<\/strong> chronic combined exposure is a recognized cause, once called tobacco-alcohol amblyopia<\/li>\n\n\n\n<li><strong>Heavy metals:<\/strong> lead, mercury, and thallium turn up in occupational and environmental exposures<\/li>\n\n\n\n<li><strong>Amiodarone, linezolid, and chloramphenicol:<\/strong> further medications linked to optic toxicity in case reports<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">All of these route to H46.3, as long as the record confirms a toxic cause. An ischemic, inflammatory, or compressive mechanism points elsewhere. What separates the toxic cases from each other is the second code and its position.<\/p>\n\n\n\n<h2 id=\"h-the-index-reaches-h46-3-through-one-path-only\" class=\"wp-block-heading\">The index reaches H46.3 through one path only<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Before you assign the code, check how you got to it. The alphabetic index reaches H46.3 through a single entry: Neuritis, optic, toxic. Its approximate synonyms are all laterality variants of the same diagnosis.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Right toxic optic neuropathy<\/li>\n\n\n\n<li>Left toxic optic neuropathy<\/li>\n\n\n\n<li>Bilateral toxic optic neuropathy<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Those synonyms name a side, yet H46.3 has no laterality subcodes. Laterality belongs in the clinical note. It also matters for any procedure you bill alongside the diagnosis.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Two nearby terms do not lead here at all. The index sends toxic amblyopia NEC and tobacco amblyopia to H53.8, other visual disturbances.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">So if the chart says amblyopia rather than optic neuritis or neuropathy, check the index first. Better still, ask the clinician to sharpen the wording. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Solid <a href=\"https:\/\/pabau.com\/blog\/medical-forms-at-your-healthcare-practice\/\">clinical documentation workflows<\/a> settle that at the point of care instead of at the billing desk.<\/p>\n\n\n\n<h2 id=\"h-where-h46-3-sits-in-the-h46-optic-neuritis-family\" class=\"wp-block-heading\">Where H46.3 sits in the H46 optic neuritis family<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">H46.3 sits inside the H46 category, optic neuritis, within the H46-H47 block for disorders of the optic nerve and visual pathways. Knowing the family prevents one common error: reaching for <a href=\"https:\/\/pabau.com\/diagnostic-codes\/icd-10-code-h469\/\">H46.9<\/a> when the record supports H46.3.<\/p>\n\n\n\n<table style=\"width:100%;border-collapse:separate;border-spacing:0;border-radius:12px;overflow:hidden;font-size:15px;line-height:1.5;margin:1.5em 0 2em;box-shadow:0 2px 12px rgba(0,0,0,0.08)\">\n<thead>\n<tr>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Code<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Description<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Notes<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">H46<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Optic neuritis (parent)<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Not billable. Header code only<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">H46.0-<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Optic papillitis<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Inflammation of the optic disc. Subcodes carry laterality<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">H46.1-<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Retrobulbar neuritis<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Inflammation behind the globe. Often linked to multiple sclerosis<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">H46.2<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Nutritional optic neuropathy<\/td>\n<td style=\"padding:12px 16px;color:#374151\">B12 or folate deficiency cause. Not a toxic cause<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">H46.3<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Toxic optic neuropathy<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Billable. Code first T51-T65 when the cause is a nonmedicinal substance<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">H46.8<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Other optic neuritis<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Type is specified but does not fit the categories above<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">H46.9<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Unspecified optic neuritis<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Use only when the cause is genuinely undetermined<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">The neighboring H47 category covers optic nerve disorders that fall outside H46. H47.01 is the code most often confused with H46.3, and it is not billable on its own. It needs a 6th character: H47.011 right eye, H47.012 left eye, H47.013 bilateral, H47.019 unspecified eye.<\/p>\n\n\n\n<h2 id=\"h-three-causes-three-sequencing-orders-for-h46-3\" class=\"wp-block-heading\">Three causes, three sequencing orders for H46.3<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The cause in the chart sets the order. H46.3 has three sequencing paths, and the record picks one of them. The code-first note covers nonmedicinal toxins only, while medicinal drugs follow two other guidelines.<\/p>\n\n\n\n<h3 id=\"h-nonmedicinal-toxins-put-the-t-code-first\" class=\"wp-block-heading\">Nonmedicinal toxins put the T code first<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">H46.3 carries one tabular instruction: code first (T51-T65, toxic effects of substances chiefly nonmedicinal as to source) to identify cause. The substance code goes ahead of H46.3, not after it. Coders often misread that as a use-additional-code note, which points the other way.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T51-T65 covers nonmedicinal substances only: alcohols, solvents, metals, carbon monoxide, and tobacco. Each toxic effect code also carries an intent character. Use 1 for accidental, 2 for intentional self-harm, 3 for assault, and 4 for undetermined. When the record says nothing about intent, the tabular note sends you to accidental.<\/p>\n\n\n\n<h3 id=\"h-a-drug-taken-as-prescribed-puts-h46-3-first\" class=\"wp-block-heading\">A drug taken as prescribed puts H46.3 first<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Medicinal drugs sit in a different range and follow a different rule. T36-T50 covers medicinal and biological substances, and H46.3 carries no note pointing there. The adverse-effect guideline takes over instead.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When a correctly prescribed, properly administered drug causes the neuropathy, code the manifestation first. That means H46.3, then the T36-T50 drug code with 5th or 6th character 5.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Take a patient on ethambutol for tuberculosis who reports fading color vision at four months. The workup confirms optic neuropathy and the physician names the drug. On the claim, H46.3 goes first, followed by T37.1X5A for the initial encounter. Reverse those two lines and the claim no longer matches the adverse-effect guideline.<\/p>\n\n\n\n<h3 id=\"h-a-misused-drug-makes-it-a-poisoning\" class=\"wp-block-heading\">A misused drug makes it a poisoning<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The same guideline sets a third path. If the patient took the drug improperly, the event is a poisoning. That covers an overdose, the wrong substance, or the wrong route. Then the T36-T50 code with intent character 1 to 4 leads, and H46.3 follows as the manifestation.<\/p>\n\n\n\n<table style=\"width:100%;border-collapse:separate;border-spacing:0;border-radius:12px;overflow:hidden;font-size:15px;line-height:1.5;margin:1.5em 0 2em;box-shadow:0 2px 12px rgba(0,0,0,0.08)\">\n<thead>\n<tr>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Cause documented<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">First-listed code<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Second code<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Rule that applies<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Nonmedicinal toxic substance, such as methanol, tobacco, lead, or carbon monoxide<\/td>\n<td style=\"padding:12px 16px;color:#374151\">T51-T65 with intent character 1 to 4<\/td>\n<td style=\"padding:12px 16px;color:#374151\">H46.3<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Code-first note at H46.3<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Medication taken as prescribed, such as ethambutol or amiodarone<\/td>\n<td style=\"padding:12px 16px;color:#374151\">H46.3<\/td>\n<td style=\"padding:12px 16px;color:#374151\">T36-T50 with character 5<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Adverse effect guideline, Section I.C.19.e.5(a)<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Medication misused, such as an overdose or the wrong drug<\/td>\n<td style=\"padding:12px 16px;color:#374151\">T36-T50 with intent character 1 to 4<\/td>\n<td style=\"padding:12px 16px;color:#374151\">H46.3<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Poisoning guideline, Section I.C.19.e.5(b)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">That order is not just paperwork. On an electronic claim, the diagnosis pointers in the <a href=\"https:\/\/pabau.com\/blog\/837-file\/\">837 file<\/a> carry the sequence you chose. Change the order in your system and the payer sees a different primary diagnosis.<\/p>\n\n\n\n<h3 id=\"h-where-each-common-substance-s-code-sits\" class=\"wp-block-heading\">Where each common substance&#8217;s code sits<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The substances that show up most often fall out of those three paths like this.<\/p>\n\n\n\n<table style=\"width:100%;border-collapse:separate;border-spacing:0;border-radius:12px;overflow:hidden;font-size:15px;line-height:1.5;margin:1.5em 0 2em;box-shadow:0 2px 12px rgba(0,0,0,0.08)\">\n<thead>\n<tr>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Causative substance<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Code that identifies the cause<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Position relative to H46.3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Ethambutol<\/td>\n<td style=\"padding:12px 16px;color:#374151\">T37.1X5-, adverse effect of antimycobacterial drugs<\/td>\n<td style=\"padding:12px 16px;color:#374151\">After H46.3<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Isoniazid<\/td>\n<td style=\"padding:12px 16px;color:#374151\">T37.1X5-, adverse effect of antimycobacterial drugs<\/td>\n<td style=\"padding:12px 16px;color:#374151\">After H46.3<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Linezolid<\/td>\n<td style=\"padding:12px 16px;color:#374151\">T36.8X5-, adverse effect of other systemic antibiotics<\/td>\n<td style=\"padding:12px 16px;color:#374151\">After H46.3<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Amiodarone<\/td>\n<td style=\"padding:12px 16px;color:#374151\">T46.2X5-, adverse effect of other antidysrhythmic drugs<\/td>\n<td style=\"padding:12px 16px;color:#374151\">After H46.3<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Methanol<\/td>\n<td style=\"padding:12px 16px;color:#374151\">T51.1X-, toxic effect of methanol<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Before H46.3<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Ethanol, chronic exposure<\/td>\n<td style=\"padding:12px 16px;color:#374151\">T51.0X-, toxic effect of ethanol<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Before H46.3<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Tobacco and nicotine<\/td>\n<td style=\"padding:12px 16px;color:#374151\">T65.29-, toxic effect of other tobacco and nicotine<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Before H46.3<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Lead<\/td>\n<td style=\"padding:12px 16px;color:#374151\">T56.0X-, toxic effects of lead and its compounds<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Before H46.3<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Mercury<\/td>\n<td style=\"padding:12px 16px;color:#374151\">T56.1X-, toxic effects of mercury and its compounds<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Before H46.3<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Carbon monoxide<\/td>\n<td style=\"padding:12px 16px;color:#374151\">T58.-, toxic effect of carbon monoxide<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Before H46.3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<h3 id=\"h-the-7th-character-is-not-optional\" class=\"wp-block-heading\">The 7th character is not optional<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Every code in both ranges needs a 7th character to be complete. Use A for the initial encounter, D for a subsequent encounter, and S for a sequela. T37.1X5A is a full code, while T37.1 is only a category.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A 6 in the drug-character position means underdosing, so it has no place on an H46.3 claim. Taking less of a drug does not cause optic toxicity. The <a href=\"https:\/\/www.cms.gov\/files\/document\/fy-2026-icd-10-cm-coding-guidelines.pdf\" target=\"_blank\" rel=\"nofollow noopener\">FY2026 ICD-10-CM coding guidelines<\/a> set out all three paths in Section I.C.19.e.<\/p>\n\n\n        <div id=\"pro_tip\">\n            <div class=\"img\">\n                <svg width=\"42\" height=\"42\" viewBox=\"0 0 42 42\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                    <path fill-rule=\"evenodd\" clip-rule=\"evenodd\"\n                        d=\"M12.6383 19.5238C12.6632 21.2071 12.8734 22.9926 12.0685 24.5523C11.0341 26.8917 8.45076 28.169 7.56292 30.5918C6.63082 33.1061 7.19505 36.185 9.31371 37.9786C10.929 39.5678 13.4183 39.9873 15.6061 39.5463C17.4592 39.073 19.1049 37.8388 19.9706 36.1608C20.781 34.7141 20.7866 32.9904 20.5293 31.3985C20.1006 29.3092 18.3775 27.8705 16.9807 26.362C14.8814 24.1005 14.6684 20.6854 15.595 17.8915C16.4331 15.4768 19.0026 14.2344 20.0425 11.9461C20.7202 10.6769 20.7506 9.20327 20.6068 7.81304C20.1864 5.40098 18.3139 3.23631 15.8716 2.56674C13.9742 2.03969 11.8224 2.30052 10.1739 3.37614C8.70522 4.34688 7.5878 5.86618 7.28356 7.58178C6.76081 9.82981 7.53525 12.2822 9.20307 13.9118C10.7658 15.4741 12.4806 17.2273 12.6383 19.5238Z\"\n                        fill=\"#2BADD4\" \/>\n                    <path fill-rule=\"evenodd\" clip-rule=\"evenodd\"\n                        d=\"M22.7048 19.8387C22.6822 22.3279 24.4507 24.6234 26.7493 25.4682C28.0531 25.961 29.4725 25.9183 30.7989 25.5487C32.0575 24.9955 33.301 24.2237 34.0069 23.0092C34.8384 21.5811 35.2982 19.8286 34.7832 18.2094C34.3611 16.2507 32.8739 14.6541 31.0275 13.9426C28.6736 12.9595 25.8073 13.7942 24.1719 15.7001C23.2022 16.8366 22.6143 18.3326 22.7048 19.8387Z\"\n                        fill=\"#2BADD4\" \/>\n                <\/svg>\n            <\/div>\n            <div class=\"text\">\n                <h3>Pro Tip<\/h3>\n                <p>Audit your H46.3 claims for order, not just for content. Pull every claim carrying H46.3 and look at which code sits on the first line. A methanol or tobacco case should lead with the T51-T65 code. An ethambutol case should lead with H46.3, followed by T37.1X5 plus its 7th character. One diagnosis code, two correct patterns, and the chart tells you which one belongs.<\/p>\n            <\/div>\n        <\/div>\n    \n\n\n<h2 id=\"h-h46-excludes-two-conditions-but-you-can-still-code-both\" class=\"wp-block-heading\">H46 excludes two conditions, but you can still code both<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Two notes and one piece of code history shape what else can go on the claim.<\/p>\n\n\n\n<h3 id=\"h-both-codes-can-ride-the-same-claim\" class=\"wp-block-heading\">Both codes can ride the same claim<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">H46 carries two Type 2 excludes: ischemic optic neuropathy (H47.01-) and neuromyelitis optica, or Devic disease (G36.0). A Type 2 exclude means the excluded condition is not part of H46. Even so, a patient can have both at once, and both codes may appear on the same claim.<\/p>\n\n\n\n<h3 id=\"h-you-do-not-need-a-separate-external-cause-code\" class=\"wp-block-heading\">You do not need a separate external cause code<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Chapter 7, H00-H59, opens with its own instruction. Use an external cause code after the eye condition code, where applicable, to identify the cause. Codes in T36-T65 already combine the substance and the intent, so you do not need a code from V00-Y99 alongside them.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The chapter also carries a Type 2 exclude for injury and poisoning, S00-T88. That is why the T code and H46.3 sit together rather than compete.<\/p>\n\n\n\n<h3 id=\"h-h46-3-has-not-changed-since-it-launched\" class=\"wp-block-heading\">H46.3 has not changed since it launched<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">H46.3 entered ICD-10-CM with the first non-draft edition, effective October 1, 2015. Every annual edition since has carried it unchanged, FY2026 included. For inpatient reporting, H46.3 groups to MS-DRG 123, neurological eye disorders.<\/p>\n\n\n\n<h2 id=\"h-what-the-chart-must-say-before-h46-3-will-hold-up\" class=\"wp-block-heading\">What the chart must say before H46.3 will hold up<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Accurate coding starts with what the clinician writes down. A note that says only optic neuropathy will not hold up. For H46.3 to survive an audit, the record needs several specific details.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>The causative agent:<\/strong> the record names the substance, so ethambutol-associated optic neuropathy rather than toxic optic neuropathy of unknown cause<\/li>\n\n\n\n<li><strong>The mechanism of exposure:<\/strong> a medication, an occupational or environmental toxin, or an ingestion. This detail decides which code goes first, so it cannot stay implicit<\/li>\n\n\n\n<li><strong>Whether the drug was taken as prescribed:<\/strong> an adverse effect and a poisoning use different characters and opposite orders. Only the record separates them<\/li>\n\n\n\n<li><strong>Exposure history:<\/strong> dose, duration, and route for drug cases. Occupational or environmental context for everything else<\/li>\n\n\n\n<li><strong>Laterality:<\/strong> toxic cases are usually bilateral. H46.3 has no laterality subcodes, but a unilateral finding still belongs in the note<\/li>\n\n\n\n<li><strong>Clinical findings:<\/strong> visual acuity, field defects, color vision loss, and any OCT or VEP results that support optic nerve involvement<\/li>\n\n\n\n<li><strong>Clinician attestation:<\/strong> someone has to state the link between the exposure and the neuropathy. A coincidence in the timeline will not carry the code<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Practices treating patients on ethambutol or linezolid should build a baseline visual assessment into the monitoring protocol. That baseline is what later turns a finding into a documented drug link. <a href=\"https:\/\/pabau.com\/blog\/hipaa-compliance-software\/\">HIPAA-compliant clinical documentation<\/a> also keeps that medication and exposure data secure.<\/p>\n\n\n\n<h2 id=\"h-h46-3-vs-the-codes-it-gets-confused-with\" class=\"wp-block-heading\">H46.3 vs the codes it gets confused with<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Several optic neuropathy codes share clinical features with H46.3. Telling them apart protects you from denials and audit exposure.<\/p>\n\n\n\n<table style=\"width:100%;border-collapse:separate;border-spacing:0;border-radius:12px;overflow:hidden;font-size:15px;line-height:1.5;margin:1.5em 0 2em;box-shadow:0 2px 12px rgba(0,0,0,0.08)\">\n<thead>\n<tr>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Code<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Diagnosis<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Key clinical distinction<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Cause code and sequence<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">H46.3<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Toxic optic neuropathy<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Documented toxic or drug exposure. Usually bilateral, and gradual with drugs<\/td>\n<td style=\"padding:12px 16px;color:#374151\">T51-T65 before H46.3, or T36-T50 with character 5 after it<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">H47.011 to H47.019<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Ischemic optic neuropathy<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Vascular cause. Sudden, usually unilateral loss, often with giant cell arteritis or hypertension<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Code the underlying condition, for example M31.6 for giant cell arteritis<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">H46.0-<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Optic papillitis<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Inflammatory. Disc swelling on funduscopy, often related to multiple sclerosis<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Underlying disease code if documented<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">H46.2<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Nutritional optic neuropathy<\/td>\n<td style=\"padding:12px 16px;color:#374151\">B12 or folate deficiency. No toxic substance identified<\/td>\n<td style=\"padding:12px 16px;color:#374151\">A nutritional deficiency code such as E53.8<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">H46.9<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Unspecified optic neuritis<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Cause genuinely undetermined after workup<\/td>\n<td style=\"padding:12px 16px;color:#374151\">None<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">H53.8<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Other visual disturbances<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Where the index routes toxic amblyopia NEC and tobacco amblyopia<\/td>\n<td style=\"padding:12px 16px;color:#374151\">None<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">The most common differential error is coding H47.01- for a presentation that later proves drug-induced. When a patient on ethambutol develops vision loss, the working code is H46.3 while the toxicity workup runs.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H47.01- carries a vascular mechanism, and that has to be confirmed on its own. The <a href=\"https:\/\/www.aapc.com\/codes\/icd-10-codes-range\/\" target=\"_blank\" rel=\"nofollow noopener\">AAPC ICD-10-CM code reference<\/a> for the H46-H47 block sets out where each category stops.<\/p>\n\n\n\n<h2 id=\"h-five-mistakes-that-get-h46-3-claims-denied\" class=\"wp-block-heading\">Five mistakes that get H46.3 claims denied<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Five mistakes come up again and again on H46.3 claims. Each one is avoidable before the claim leaves your desk.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Sequencing the cause code after H46.3 on a nonmedicinal case:<\/strong> the code-first note puts T51-T65 ahead of H46.3. A methanol or carbon monoxide case that leads with H46.3 contradicts the tabular list<\/li>\n\n\n\n<li><strong>Treating T36-T65 as one instruction:<\/strong> only T51-T65 is named at H46.3. Medicinal drugs in T36-T50 fall under the adverse-effect guideline, which reverses the order<\/li>\n\n\n\n<li><strong>Using the wrong character on a drug code:<\/strong> a 5 marks an adverse effect. Characters 1 to 4 are poisoning intents, and 6 is underdosing<\/li>\n\n\n\n<li><strong>Dropping the 7th character:<\/strong> T37.1X5 is incomplete without A, D, or S. A truncated T code is invalid wherever it sits<\/li>\n\n\n\n<li><strong>Coding H46.9 when a toxic cause is documented:<\/strong> unspecified optic neuritis is for a genuinely undetermined cause. If the record names the agent, H46.3 is what the documentation supports<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">For <a href=\"https:\/\/pabau.com\/blog\/patient-care-management\/\">patient care documentation<\/a>, a structured approach to ophthalmology notes keeps these errors from surfacing weeks later. When the clinician records the agent and the exposure history, the coder has what the claim needs. Nobody has to chase the chart.<\/p>\n\n\n\n<h2 id=\"h-run-this-check-before-you-submit-an-h46-3-claim\" class=\"wp-block-heading\">Run this check before you submit an H46.3 claim<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Before the claim goes out, read it in the order the payer will read it. A 60-second pass catches almost everything.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Does the first-listed code match the cause in the chart? A nonmedicinal toxin means the T code leads<\/li>\n\n\n\n<li>Does every T code carry its 7th character, A, D, or S?<\/li>\n\n\n\n<li>Is the drug character right? A 5 for an adverse effect, 1 to 4 for a poisoning<\/li>\n\n\n\n<li>Does the note name the substance, not just the diagnosis?<\/li>\n\n\n\n<li>Has the clinician stated the link between the exposure and the vision loss?<\/li>\n\n\n\n<li>Do the diagnosis pointers on each service line point where you meant them to?<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Two things trip these claims up most often. One is a chart that names a drug without saying whether the patient took it as prescribed. The other is a T code that never picked up its 7th character.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If your front desk builds claims from a <a href=\"https:\/\/pabau.com\/templates\/superbill-template\/\">superbill<\/a>, the diagnosis order has to be right on that form too. Run <a href=\"https:\/\/pabau.com\/blog\/insurance-eligibility-verification\/\">eligibility verification<\/a> before the visit as well. A coverage problem bounces a correctly coded claim just as fast as a sequencing error.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A denial does not just cost you the rework. It also ages the claim, and aged claims are where <a href=\"https:\/\/pabau.com\/blog\/what-is-revenue-cycle-management\/\">revenue cycle management<\/a> gets expensive.<\/p>\n\n\n\n<h2 id=\"h-how-pabau-keeps-the-coding-detail-in-the-chart\" class=\"wp-block-heading\">How Pabau keeps the coding detail in the chart<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The documentation problems behind H46.3 errors start at the point of care. Whoever writes the note has to capture the drug, the exposure history, and whether the patient took it as prescribed. Without those three, the coder cannot tell which sequencing path applies.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Practice management software like Pabau closes that distance. Its <a href=\"https:\/\/pabau.com\/features\/claims-management-software\/\">claims management software<\/a> and <a href=\"https:\/\/pabau.com\/features\/medical-records-management\/\">structured patient records<\/a> keep the diagnosis and its cause in the same place.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/cdn.pabau.com\/cdn\/attachments\/pulse\/content-engine\/diagnostic_codes\/icd-10-code-h463\/fully-integrated-with-pabau-billing.webp\" alt=\"Fully Integrated with Pabau Billing\"\/><figcaption class=\"wp-element-caption\"><em>Pabau&#8217;s billing sits inside the patient record, so the diagnosis captured at the consultation lands on the claim without re-keying.<\/em><\/figcaption><\/figure>\n\n\n\n<div style=\"height:35px;width:800px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Four capabilities matter most for toxic optic neuropathy documentation:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Structured clinical note fields:<\/strong> configurable templates prompt the clinician for the causative agent, the mechanism of exposure, and laterality during the visit<\/li>\n\n\n\n<li><strong>ICD-10-CM and CPT lookup libraries:<\/strong> a coder can search H46.3 or T37.1X5A from inside the record, with no second reference to open<\/li>\n\n\n\n<li><strong>Claim forms pre-filled from the record:<\/strong> diagnosis codes on the client&#8217;s problem list seed the claim form. Pabau validates the required fields before you send it. Sequencing stays your decision, so the order you choose is the order that goes out<\/li>\n\n\n\n<li><strong>Audit trail and compliance documentation:<\/strong> every entry is timestamped and attributed, which supports the trail if a claim is reviewed<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Pabau uses the same structured-note approach across specialties. A <a href=\"https:\/\/pabau.com\/industry\/functional-medicine-software\/\">functional medicine clinic<\/a> and an <a href=\"https:\/\/pabau.com\/industry\/iv-therapy-emr-software\/\">IV therapy service<\/a> configure different fields from the same templates.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Practices moving off paper notes see the biggest gain here, because specialty-structured notes produce coding-ready records. Pabau&#8217;s <a href=\"https:\/\/pabau.com\/blog\/ehr-integration\/\">EHR integration workflows<\/a> then connect those records to downstream billing without re-keying data.<\/p>\n\n\n        <div id=\"pro_tip\">\n            <div class=\"img\">\n                <svg width=\"42\" height=\"42\" viewBox=\"0 0 42 42\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                    <path fill-rule=\"evenodd\" clip-rule=\"evenodd\"\n                        d=\"M12.6383 19.5238C12.6632 21.2071 12.8734 22.9926 12.0685 24.5523C11.0341 26.8917 8.45076 28.169 7.56292 30.5918C6.63082 33.1061 7.19505 36.185 9.31371 37.9786C10.929 39.5678 13.4183 39.9873 15.6061 39.5463C17.4592 39.073 19.1049 37.8388 19.9706 36.1608C20.781 34.7141 20.7866 32.9904 20.5293 31.3985C20.1006 29.3092 18.3775 27.8705 16.9807 26.362C14.8814 24.1005 14.6684 20.6854 15.595 17.8915C16.4331 15.4768 19.0026 14.2344 20.0425 11.9461C20.7202 10.6769 20.7506 9.20327 20.6068 7.81304C20.1864 5.40098 18.3139 3.23631 15.8716 2.56674C13.9742 2.03969 11.8224 2.30052 10.1739 3.37614C8.70522 4.34688 7.5878 5.86618 7.28356 7.58178C6.76081 9.82981 7.53525 12.2822 9.20307 13.9118C10.7658 15.4741 12.4806 17.2273 12.6383 19.5238Z\"\n                        fill=\"#2BADD4\" \/>\n                    <path fill-rule=\"evenodd\" clip-rule=\"evenodd\"\n                        d=\"M22.7048 19.8387C22.6822 22.3279 24.4507 24.6234 26.7493 25.4682C28.0531 25.961 29.4725 25.9183 30.7989 25.5487C32.0575 24.9955 33.301 24.2237 34.0069 23.0092C34.8384 21.5811 35.2982 19.8286 34.7832 18.2094C34.3611 16.2507 32.8739 14.6541 31.0275 13.9426C28.6736 12.9595 25.8073 13.7942 24.1719 15.7001C23.2022 16.8366 22.6143 18.3326 22.7048 19.8387Z\"\n                        fill=\"#2BADD4\" \/>\n                <\/svg>\n            <\/div>\n            <div class=\"text\">\n                <h3>Pro Tip<\/h3>\n                <p>Capture a baseline before ethambutol or linezolid therapy starts. Visual acuity, color vision, and a visual field at treatment start give you a documented reference point. If neuropathy appears months later, that baseline is what ties the drug to the finding in the record. That tie supports H46.3 over H46.9, and it points the coder to the adverse-effect path.<\/p>\n            <\/div>\n        <\/div>\n    \n\n        <div id=\"book_a_demo\">\n            <div class=\"left-side\">\n                <div class=\"logo\">\n                    <img decoding=\"async\"\n                        src=\"https:\/\/pabau.com\/wp-content\/uploads\/2026\/01\/Logo.svg\"\n                        alt=\"Logo\"\n                        loading=\"lazy\"\n                    \/>\n                <\/div>\n\n                <h3 class=\"heading\">\n                    Keep every coding detail in the chart                <\/h3>\n\n                <p class=\"description\">\n                    Pabau&#8217;s structured patient records hold the causative agent, the exposure history, and the diagnosis in one place. Its claims tools then pre-fill the claim from that record before you submit.                <\/p>\n\n                <div class=\"button-group\">\n                    <a href=\"\/book-demo\/\" class=\"btn btn-scale-effect btn-cta-color btn-md\">\n                        <span class=\"btn-text\">Book a demo<\/span>\n                        <div class=\"btn-icon btn-icon-right\" aria-hidden=\"true\">\n                            <svg\n                                width=\"14\"\n                                height=\"12\"\n                                viewBox=\"0 0 14 12\"\n                                fill=\"none\"\n                                xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n                            >\n                                <path\n                                    d=\"M0.75 4.77295C0.335786 4.77295 0 5.10874 0 5.52295C0 5.93716 0.335786 6.27295 0.75 6.27295V5.52295V4.77295ZM13.2803 6.05328C13.5732 5.76039 13.5732 5.28551 13.2803 4.99262L8.50736 0.219648C8.21447 -0.073245 7.73959 -0.073245 7.4467 0.219648C7.15381 0.512542 7.15381 0.987415 7.4467 1.28031L11.6893 5.52295L7.4467 9.76559C7.15381 10.0585 7.15381 10.5334 7.4467 10.8263C7.73959 11.1191 8.21447 11.1191 8.50736 10.8263L13.2803 6.05328ZM0.75 5.52295V6.27295L12.75 6.27295V5.52295V4.77295L0.75 4.77295V5.52295Z\"\n                                    fill=\"currentColor\"\n                                ><\/path>\n                            <\/svg>\n                        <\/div>\n                    <\/a>\n                <\/div>\n            <\/div>\n\n            <div class=\"right-side\">\n                <img decoding=\"async\"\n                    src=\"https:\/\/pabau.com\/wp-content\/uploads\/2026\/01\/Home-Page-Concept-4.webp\"\n                    alt=\"Pabau clinic management platform\"\n                    loading=\"lazy\"\n                \/>\n            <\/div>\n        <\/div>\n        \n\n\n<h2 id=\"h-conclusion\" class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">H46.3 is a simple code with one decision attached to it. Read the chart for the cause before you build the claim. A nonmedicinal toxin puts a T51-T65 code ahead of H46.3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A drug taken as prescribed puts a T36-T50 code with character 5 behind it. Misuse flips it again, and the poisoning code leads. Name the agent, pick the path, and the claim matches the record.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pabau&#8217;s structured records and claims tools help ophthalmology teams capture that detail at the point of care. <a href=\"https:\/\/pabau.com\/book-demo\/\">Book a demo<\/a> to see how it fits your practice&#8217;s billing workflow.<\/p>\n\n\n        <div id=\"expert_picks\">\n            <div class=\"header\">\n                                    <img decoding=\"async\" src=\"https:\/\/pabau.com\/wp-content\/uploads\/2025\/11\/Expert-Picks.svg\" alt=\"Continue your research\" height=\"42\" width=\"42\">\n                                <h3>Continue your research<\/h3>\n            <\/div>\n            <div class=\"content\">\n                                                            <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#54B2D3\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p><strong>Documenting permanent vision loss after the exposure?<\/strong> <a href=\"https:\/\/pabau.com\/diagnostic-codes\/icd-10-code-h548\/\" rel=\"noopener\">H54.8<\/a> covers legal blindness as ICD-10-CM defines it in the US, and the documentation payers expect.<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#54B2D3\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p><strong>Cause still undetermined after the workup?<\/strong> <a href=\"https:\/\/pabau.com\/diagnostic-codes\/icd-10-code-h059\/\" rel=\"noopener\">H05.9<\/a> shows what an unspecified orbit disorder costs you in specificity, and when a sharper code exists.<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#54B2D3\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p><strong>Want the compliance side of your billing checked?<\/strong> <a href=\"https:\/\/pabau.com\/blog\/medical-billing-compliance\/\" rel=\"noopener\">Medical billing compliance<\/a> sets out the laws and violations that draw audits, with a checklist you can download.<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#54B2D3\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p><strong>Reading denials off the remittance file?<\/strong> <a href=\"https:\/\/pabau.com\/blog\/electronic-remittance-advice\/\" rel=\"noopener\">Electronic remittance advice<\/a> explains how an ERA reports a payment decision and what to do with the codes it carries.<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#54B2D3\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p><strong>Not sure how long you have to refile?<\/strong> <a href=\"https:\/\/pabau.com\/blog\/timely-filing-limits\/\" rel=\"noopener\">Timely filing limits<\/a> breaks down the windows for initial claims, corrected claims, and appeals by payer.<\/p>\n                        <\/div>\n                                                <\/div>\n        <\/div>\n    \n\n\n<h2 id=\"h-frequently-asked-questions\" class=\"wp-block-heading\">Frequently asked questions<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1\"><h3 class=\"schema-faq-question\">Can you code H46.3 when the toxic cause is only suspected?<\/h3> <p class=\"schema-faq-answer\">Not on an outpatient claim. Code the documented vision loss and findings instead, then update the claim once the workup names the agent. Inpatient rules do allow a suspected diagnosis at discharge, so check which setting you are billing.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-2\"><h3 class=\"schema-faq-question\">How do you code a follow-up visit after the drug is stopped?<\/h3> <p class=\"schema-faq-answer\">H46.3 stays on the claim while the neuropathy is still under treatment. Change the T code&#8217;s 7th character to D for a subsequent encounter. Once the damage is permanent, code the residual condition first, then the T code with S.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-3\"><h3 class=\"schema-faq-question\">Which tests usually go on the claim with H46.3?<\/h3> <p class=\"schema-faq-answer\">Visual acuity, color vision testing, visual fields, and optic nerve OCT carry most of the workup. Bill each one with the CPT code your payer recognizes, and make sure the note supports the test you performed.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-4\"><h3 class=\"schema-faq-question\">Can a coder query the physician to reach H46.3?<\/h3> <p class=\"schema-faq-answer\">Yes. A compliant query points to the missing or conflicting detail and asks the clinician to clarify it. Never suggest the answer, and never name the code you want.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-5\"><h3 class=\"schema-faq-question\">What if the payer denies the claim as a sequencing error?<\/h3> <p class=\"schema-faq-answer\">Fix the order and refile inside the payer&#8217;s correction window. Send the note that names the agent with the appeal, since the sequence follows the cause the clinician documented.<\/p> <\/div> <\/div>\n","protected":false},"excerpt":{"rendered":"<p>H46.3 codes toxic optic neuropathy. Learn why a nonmedicinal toxin puts the T51-T65 code first, while a drug taken as prescribed puts H46.3 on line one.<\/p>\n","protected":false},"author":85,"featured_media":154229,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_linkdex":"86","_yoast_wpseo_content_score":"90","_yoast_wpseo_is_cornerstone":"","_yoast_wpseo_keywordsynonyms":"[\"\",\"\",\"\",\"\"]","_yoast_wpseo_focuskw_text_input":"","_seo_original_html":"","footnotes":""},"categories":[1549,1550],"tags":[1580,1363,2508,1646],"class_list":["post-154232","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-diagnostic-codes","category-icd-10-cm","tag-diagnostic-coding","tag-icd-10","tag-medical-coding","tag-ophthalmology-billing"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.2 (Yoast SEO v28.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>ICD-10 code H46.3: Sequencing toxic optic neuropathy<\/title>\n<meta name=\"description\" content=\"H46.3 codes toxic optic neuropathy. Learn when T51-T65 comes first for nonmedicinal toxins and when H46.3 is first for prescribed drugs.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/pabau.com\/nl\/diagnostic-codes\/icd-10-code-h463\/\" \/>\n<meta property=\"og:locale\" content=\"nl_NL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ICD-10 code H46.3: Sequencing toxic optic neuropathy\" \/>\n<meta property=\"og:description\" content=\"H46.3 codes toxic optic neuropathy. 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Bill each one with the CPT code your payer recognizes, and make sure the note supports the test you performed.","inLanguage":"nl-NL"},"inLanguage":"nl-NL"},{"@type":"Question","@id":"https:\/\/pabau.com\/nl\/diagnostic-codes\/icd-10-code-h463\/#faq-question-4","position":4,"url":"https:\/\/pabau.com\/nl\/diagnostic-codes\/icd-10-code-h463\/#faq-question-4","name":"Can a coder query the physician to reach H46.3?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Yes. A compliant query points to the missing or conflicting detail and asks the clinician to clarify it. Never suggest the answer, and never name the code you want.","inLanguage":"nl-NL"},"inLanguage":"nl-NL"},{"@type":"Question","@id":"https:\/\/pabau.com\/nl\/diagnostic-codes\/icd-10-code-h463\/#faq-question-5","position":5,"url":"https:\/\/pabau.com\/nl\/diagnostic-codes\/icd-10-code-h463\/#faq-question-5","name":"What if the payer denies the claim as a sequencing error?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Fix the order and refile inside the payer's correction window. Send the note that names the agent with the appeal, since the sequence follows the cause the clinician documented.","inLanguage":"nl-NL"},"inLanguage":"nl-NL"}]}},"yoast":{"focus_keyword":"ICD-10 code H46.3","seo_title":"ICD-10 code H46.3: Sequencing toxic optic neuropathy","meta_description":"H46.3 codes toxic optic neuropathy. Learn when T51-T65 comes first for nonmedicinal toxins and when H46.3 is first for prescribed drugs.","content_score":"90","is_cornerstone":"","related_keyphrases":[{"keyword":"optic neuritis icd 10","score":61},{"keyword":"drug-induced optic neuropathy","score":61},{"keyword":"optic neuropathy documentation guidelines","score":61}]},"_links":{"self":[{"href":"https:\/\/pabau.com\/nl\/wp-json\/wp\/v2\/posts\/154232","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pabau.com\/nl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pabau.com\/nl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pabau.com\/nl\/wp-json\/wp\/v2\/users\/85"}],"replies":[{"embeddable":true,"href":"https:\/\/pabau.com\/nl\/wp-json\/wp\/v2\/comments?post=154232"}],"version-history":[{"count":4,"href":"https:\/\/pabau.com\/nl\/wp-json\/wp\/v2\/posts\/154232\/revisions"}],"predecessor-version":[{"id":184569,"href":"https:\/\/pabau.com\/nl\/wp-json\/wp\/v2\/posts\/154232\/revisions\/184569"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pabau.com\/nl\/wp-json\/wp\/v2\/media\/154229"}],"wp:attachment":[{"href":"https:\/\/pabau.com\/nl\/wp-json\/wp\/v2\/media?parent=154232"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pabau.com\/nl\/wp-json\/wp\/v2\/categories?post=154232"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pabau.com\/nl\/wp-json\/wp\/v2\/tags?post=154232"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}