CCSD code C6230 – Laser iridotomy (unilateral)

Key takeaways

CCSD Code C6230 covers laser iridotomy on one eye, so each code instance represents a single treated eye.

Therapeutic and prophylactic iridotomy both bill under C6230, because the code does not distinguish by indication.

When both eyes are treated in one session, bill C6231 instead, since CCSD lists the two codes as an unacceptable combination.

Elective iridotomy usually needs insurer pre-authorization, and a missing or expired reference is a common reason claims are rejected.

Pabau, the practice management platform we build, keeps treatment notes, consent forms and invoices in one patient record for claim preparation.

What CCSD Code C6230 covers

CCSD Code C6230 is the procedure code for a laser iridotomy performed on one eye. The official descriptor is Laser iridotomy – unilateral, so each code instance represents a single eye. Same-session treatment of both eyes uses the adjacent code C6231 instead.

The code sits in sub-chapter 4.8.0 Iris & Anterior Chamber of the CCSD Schedule, which the Clinical Coding and Schedule Development Group maintains. You can browse its neighbors in our CCSD codes library.

C6230 applies whichever laser is used. Nd:YAG has largely replaced argon laser for peripheral iridotomy in UK practice, but the code mandates neither. Both are billable under C6230 when the clinical record notes the modality.

What the code includes and excludes

C6230 covers the laser procedure itself and typically includes immediate post-procedure intraocular pressure (IOP) monitoring in the same sitting. Whether post-operative review appointments are bundled or separately billable depends on the individual payer’s fee schedule and policy. Always check the relevant payer’s provider manual rather than assuming a universal rule.

What the procedure involves: Laser iridotomy explained

Laser iridotomy creates a small full-thickness opening in the peripheral iris. Aqueous humor can then bypass a pupillary block, which equalizes pressure between the posterior and anterior chambers. The procedure is performed at the slit lamp under topical anesthesia.

A standard procedure follows these five steps, and each one leaves a record the claim depends on:

1. Indication assessment: Confirmed diagnosis and IOP measurement recorded before the procedure. Use H40.2 for primary angle-closure glaucoma, or H40.0 for occludable or narrow angles without glaucoma.
2. Patient preparation: Topical anesthetic drops (typically proxymetacaine) applied; a contact lens (Abraham or Wise iridotomy lens) placed on the eye to focus the laser beam.
3. Laser application: Nd:YAG laser pulses delivered to the superior peripheral iris (usually at 10-11 o’clock position) until a patent opening is confirmed by transillumination.
4. Post-procedure IOP check: IOP measured at 30-60 minutes post-treatment to detect any acute pressure spike; topical anti-inflammatory drops prescribed.
5. Discharge and follow-up plan: Patient instructions issued; follow-up appointment arranged. Laterality (right eye / left eye) confirmed and documented.

Clinical indications for CCSD Code C6230

C6230 is appropriate across a range of angle-closure conditions. UK private medical insurance (PMI) payers typically accept the following indications, provided they are documented with a matching ICD-10 diagnosis code:

• Acute angle-closure glaucoma (AACG): Emergency or urgent treatment to break an acute attack. ICD-10: H40.2 (primary angle-closure glaucoma).
• Chronic angle-closure glaucoma: Established angle-closure requiring iridotomy to halt progression.
• Prophylactic treatment of narrow angles: Anatomically occludable angles identified on gonioscopy or van Herick grading, treated before an acute event occurs. Anatomically narrow angles without glaucoma map to ICD-10 H40.0.
• Fellow eye prophylaxis: Preventive treatment of the contralateral eye following a unilateral acute angle-closure attack.
• Plateau iris configuration: Iridotomy performed to exclude pupillary block as a component; may require subsequent iridoplasty if IOP remains elevated.

Prophylactic vs therapeutic iridotomy: Does indication affect CCSD Code C6230 billing?

C6230 applies to both therapeutic and prophylactic laser iridotomy. The code does not differentiate by clinical urgency. What does differ is the payer pathway: Emergency acute angle-closure cases typically bypass or fast-track pre-authorization. Prophylactic procedures for narrow angles almost always require pre-auth before the procedure takes place.

C6230 vs C6231 and surgical iridectomy: Choosing the right code

Three procedures are easy to confuse in ophthalmic billing, and each takes a different code. The choice turns on two facts: how the iris opening was made, and how many eyes were treated in one session. The decision path below shows how those two facts settle the code.

Two separate sessions, two eyes: If the right and left eyes are treated on different dates, use two separate lines of C6230. Each line carries the laterality of the eye treated that day. Do not use C6231 for staged bilateral procedures. The table compares the three procedures side by side.

CCSD lists C6231 as an unacceptable combination with C6230, so the two codes never appear on the same claim. Check the current CCSD schedule before submission, as the schedule is revised periodically.

Documentation requirements for CCSD Code C6230 claims

Complete clinical records protect a claim against denial and payer audit. Structured operative note templates and digital intake forms reduce the chance of a missing field at submission. The minimum documentation for a C6230 claim includes:

1. Confirmed diagnosis with ICD-10 code: The operative record must include a coded diagnosis that matches the indication submitted to the payer. Use H40.2 for primary angle-closure glaucoma, or H40.0 for narrow angles without glaucoma.
2. Laterality clearly recorded: Right eye (OD), left eye (OS), or bilateral must appear unambiguously in the procedure note. The laterality on the claim must match it exactly at the Healthcode data-entry stage.
3. Laser modality used: State whether Nd:YAG or argon laser was applied. C6230 does not specify modality, but payers may request this during audit.
4. Pre-procedure and post-procedure IOP: IOP in mmHg, measured by applanation tonometry or equivalent, documented before and at 30-60 minutes after the procedure.
5. Patient consent: Documented verbal and written consent for the procedure.
6. Pre-authorization reference number: For elective procedures, the payer-issued pre-auth reference must appear on the claim. A missing reference is a common cause of non-payment.
7. Surgeon details: Responsible clinician name and GMC registration number.

Store consent forms and procedure notes against the patient record in line with UK GDPR. The full audit trail is then ready if a payer asks for supporting evidence.

Payer pre-authorization requirements for C6230

Most major UK PMI providers require pre-authorization before elective laser iridotomy. Submitting without a valid pre-auth reference is a frequent cause of rejected ophthalmic claims. Emergency acute angle-closure cases often qualify for a retrospective or fast-track pathway. Confirm this with each payer’s provider team before assuming a blanket exemption.

Pre-authorization rules change, and individual policy terms vary. Always consult the current provider manual for each payer before submitting.

The CCSD official schedule holds the authoritative code definitions that UK private medical insurers work from. For Bupa submissions, our Bupa CCSD codes list gathers the insurer’s accepted codes in one place.

Submitting CCSD Code C6230 via Healthcode

Healthcode is the main electronic billing clearinghouse for UK private medical insurance claims. A handful of fields cause most C6230 rejections, so check them on every submission. Pabau’s claims management software keeps invoices and treatment notes in the same patient record, so each claim can be checked against the operative note.

1. Select the correct CCSD code: Enter C6230 for unilateral; C6231 if both eyes were treated in the same session. A common error is defaulting to C6230 twice for same-session bilateral rather than switching to C6231.
2. Enter laterality correctly: The laterality field (right/left/bilateral) must match the operative note exactly. A blank laterality field is a common cause of rejection.
3. Attach the pre-auth reference: Enter the authorization number issued by the payer before or immediately after the procedure. Elective submissions need it.
4. Include the ICD-10 diagnosis code: The diagnosis code must be a valid, current ICD-10 code that matches the documented indication. H40.2 covers primary angle-closure glaucoma, while H40.1 covers primary open-angle glaucoma.
5. Check for bundling conflicts: If a same-day consultation is being billed, confirm the payer’s co-billing rules for a consultation and a procedure. The section below covers the common cases.
6. Review before submission: Confirm that no mandatory field is blank and the pre-auth reference is valid. The date of service must also fall inside the pre-auth approval window.

Common CCSD Code C6230 claim denial reasons

Checking for these denial patterns before submission is faster than chasing rejected claims afterward. These are the most common reasons UK PMI payers reject C6230 claims:

Related CCSD ophthalmology codes

Several codes are commonly submitted alongside or instead of C6230. Knowing where each one applies prevents unbundling errors and miscoding:

Check the current schedule and the CCSD technical guide before submission, as the schedule is revised periodically. CCSD also lists anterior chamber injection, C6930, as an unacceptable combination with C6230.

Can C6230 be billed alongside other codes on the same date?

Yes, in some cases. A separately documented consultation can often be billed on the same date, but IOP checks and trabeculoplasty on the same eye cannot. Rules vary by payer, and these principles apply across most UK PMI providers:

• Same-day consultation: A consultation code is typically billable on the same day as C6230 if a separate, substantive clinical assessment took place. A routine pre-procedure check does not qualify. Document the consultation distinctly from the procedure note. Some payers apply a percentage reduction to the consultation fee when a procedure is also billed on the same date.
• IOP measurement: Generally considered bundled within C6230. Billing a separate tonometry code in addition to C6230 for the same session is a common unbundling trigger. Check individual payer schedules, as some insurers publish explicit unbundling rules.
• Laser trabeculoplasty: Do not bill C6230 and a laser trabeculoplasty code for the same eye on the same date. Iridotomy and trabeculoplasty treat different mechanisms of glaucoma and are not performed in a single procedure session for the same eye.
• Gonioscopy: If performed as a standalone diagnostic assessment prior to the procedure date, it may be separately billable. If performed in the same sitting immediately before laser, expect it to be bundled.

How Pabau keeps C6230 claims consistent with the operative note

In many ophthalmology practices, the operative note sits in one system, the consent form in another, and the claim is keyed by hand. Laterality, pre-auth references and diagnosis codes get copied between screens, and that is where C6230 claims go wrong.

Pabau holds the treatment note, signed consent and invoice in the same patient record. Billing staff can check the code, the eye treated and the diagnosis against the operative note before a claim leaves the practice.

The result is fewer claims returned for a mismatched field, and an audit trail that is already filed if a payer asks for evidence.

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Conclusion

C6230 is a simple code to select and an easy one to get rejected. Its rejections cluster around laterality, the pre-auth reference and the C6230/C6231 split. Each one comes down to a claim field that does not match the operative note.

So treat the operative note as the source for every claim field, and check the claim against it before it goes to Healthcode. A practice that does this on every iridotomy spends less time on resubmissions and has its audit evidence ready when a payer asks.

Pabau supports that discipline with claims management and structured treatment notes in one patient record. Book a demo to see how it fits an ophthalmology billing workflow.

Continue your research

Need a full CCSD code guide for Bupa submissions? Bupa CCSD codes covers the full Bupa procedure code list used for UK private practice billing, including ophthalmic and surgical codes.

Billing an anterior chamber injection? CCSD Code C6930 explains how to bill anterior chamber injection, a code CCSD bars from the same claim as C6230.

Moving on to glaucoma surgery? CCSD Code C6160 covers billing for complex glaucoma surgery under the CCSD Schedule.

Treating refractory glaucoma? CCSD Code C6610 explains billing for ciliary body ablation.

Frequently asked questions about CCSD Code C6230