ICD-10 Code L65.8: Other specified nonscarring hair loss

Key Takeaways

ICD-10 Code L65.8 is a billable ICD-10-CM diagnosis code for other specified nonscarring hair loss, effective October 1, 2025 under the 2026 edition.

Use L65.8 when the patient’s hair loss type is nonscarring and named (e.g. traction alopecia, loose anagen syndrome) but has no dedicated L65 code of its own — telogen effluvium and anagen effluvium each have their own codes, L65.0 and L65.1.

Defaulting to L65.9 (unspecified) when the hair loss type is documented is one of the most common and avoidable coding errors for this category.

Pabau, practice management software for dermatology and aesthetics practices, helps clinicians capture the condition name, nonscarring confirmation, and causative factor that accurate L65 family coding depends on.

ICD-10 Code L65.8 is a billable diagnosis code for other specified nonscarring hair loss. It sits in one of the more nuanced corners of dermatology coding, where specificity requirements are strict. Choosing the right code across the L65 family (L65.0 telogen effluvium, L65.1 anagen effluvium, L65.2 alopecia mucinosa, L65.8, L65.9) and the broader alopecia range (L63, L64, L66) depends on what the clinician has documented and which hair loss type is confirmed.

This reference covers the ICD-10-CM Code L65.8 definition and billable status, the clinical conditions it captures, the scarring versus nonscarring distinction that drives code selection, related codes across the L63 to L66 range, and the documentation requirements coders need to support clean claims.

ICD-10 Code L65.8: Definition and billable status

ICD-10 Code L65.8 is a valid, billable, and specific ICD-10-CM diagnosis code for the 2026 edition. Its full descriptor is “Other specified nonscarring hair loss.” The code became effective on October 1, 2025.

According to the CDC/NCHS ICD-10-CM web tool, L65.8 belongs to the International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM), maintained jointly by the Centers for Medicare and Medicaid Services (CMS) and the National Center for Health Statistics (NCHS).

L65.8 sits within category L65 (Other nonscarring hair loss), which is itself part of block L60-L75 (Disorders of skin appendages) in Chapter 12 of ICD-10-CM (Diseases of the skin and subcutaneous tissue, L00-L99). Being a billable/specific code means it can be used directly on a claim for reimbursement without requiring a more detailed subcategory selection.

Category L65 carries two coding-convention notes that apply across all of its subcodes. An Excludes1 note excludes trichotillomania (F63.3): compulsive hair-pulling is classified as a mental and behavioral disorder and must never be coded alongside L65.

A Use Additional Code note also applies: when the hair loss is drug-induced, add a code from T36-T50 (adverse effect, 5th or 6th character 5) to identify the drug. That second note matters most for L65.1 (Anagen effluvium), which is frequently chemotherapy- or drug-induced.

Code at a glance

What “other specified nonscarring hair loss” means

The phrase “other specified” is ICD-10-CM’s way of saying the condition is known and documented, but it doesn’t fit cleanly into any of the named subcategories within L65. Nonscarring hair loss refers to hair loss that occurs without permanent destruction of the hair follicle. This is the key clinical distinction: follicles remain intact, meaning regrowth is theoretically possible.

L65.8 applies when the clinician has identified a specific type of nonscarring hair loss that the tabular list doesn’t assign its own dedicated code. Common inclusion terms and approximate synonyms for L65.8 include:

• Traction alopecia (hairstyle-induced or mechanical alopecia)
• Loose anagen syndrome
• Other named nonscarring hair loss types that don’t have their own L65 subcode

The “other specified” qualifier creates an important coding obligation: if you are using L65.8, the documentation must name the condition. A vague note of “hair loss” or “alopecia NOS” does not support this code, and that scenario defaults to L65.9.

Note also that telogen effluvium, anagen effluvium, and alopecia mucinosa each have their own dedicated code (L65.0, L65.1, L65.2) and should never be reported under L65.8.

Scarring vs. nonscarring hair loss: Why the distinction matters for coding

This is where the majority of dermatology coding errors originate. Scarring alopecia (cicatricial alopecia) destroys the hair follicle permanently. Nonscarring alopecia leaves the follicle intact.

The clinical difference drives the entire code selection, because ICD-10-CM separates them into entirely different code blocks: L65.x for nonscarring, L66.x for scarring. Good skin assessment in dermatology practice starts with this distinction before any code is assigned.

A critical note for traction alopecia: early-stage traction alopecia is nonscarring and maps to L65.8. End-stage traction alopecia with confirmed follicular fibrosis crosses into scarring territory and may require a code from L66.x. Documentation of the disease stage matters for accurate code assignment.

Conditions across the L65 family, and where L65.8 fits

The L65 category splits nonscarring hair loss into codes built around a specific mechanism — telogen effluvium, anagen effluvium, alopecia mucinosa — plus L65.8 as the catch-all for named types that don’t fit one of those dedicated codes. Practices seeing these patients benefit from dermatology practice management software that helps map each presentation correctly. The main conditions are:

Telogen effluvium and ICD-10 coding

Telogen effluvium is diffuse shedding caused by a shift of hair follicles into the telogen (resting) phase, typically triggered by physiologic stress: surgery, childbirth, severe illness, crash dieting, or hormonal change. It is one of the most common nonscarring hair loss diagnoses seen in primary care and dermatology.

Telogen effluvium has its own dedicated ICD-10-CM code, L65.0, and should be coded there directly — not under L65.8. The residual L65.8 code is reserved for named nonscarring hair loss types that don’t have a dedicated code of their own, and telogen effluvium isn’t one of them.

When a causative condition is documented (e.g., postpartum state, thyroid disorder), assign an additional code for the underlying cause alongside L65.0.

Anagen effluvium, chemotherapy, and ICD-10 coding

Anagen effluvium is hair loss during the active growth (anagen) phase, caused by a toxic insult to the follicle rather than a shift into the resting phase. Chemotherapy is the best-known trigger, but radiation and certain other drugs and toxins can cause it too.

Anagen effluvium codes to L65.1 whether it is chemotherapy-induced or not — it does not belong under L65.8. When a specific drug is the documented cause, ICD-10-CM guidelines require an additional code from T36-T50 (adverse effect, 5th or 6th character 5) to identify that drug alongside L65.1.

Traction alopecia and ICD-10 coding

Traction alopecia results from chronic mechanical tension on hair follicles from tight braids, weaves, extensions, or ponytails. It is most prevalent along the frontotemporal hairline.

Traction alopecia ICD-10 coding falls under L65.8 in the early and intermediate stages, when the follicle is still intact. Documentation should state the mechanical or hairstyle-related cause and confirm the absence of follicular scarring on clinical exam or biopsy.

Patients presenting at practices navigating hair clinic compliance requirements often have multi-stage traction alopecia with mixed clinical findings. Coding accuracy depends on whether the current presentation is still reversible (L65.8) or has progressed to permanent follicular loss (L66.x).

Loose anagen syndrome, another named nonscarring hair loss type without its own dedicated code, is coded the same way — to L65.8 — once the diagnosis is documented.

Related ICD-10 codes: The L65 family and beyond

Understanding where L65.8 sits within the broader alopecia code family is essential for accurate selection. ICD-10-CM groups hair loss conditions across four main categories, each capturing a different pathological mechanism. The same category-first structure repeats elsewhere in ICD-10-CM: Z51.6 is likewise scoped to a single encounter type rather than a diagnosis family. The AAPC Codify ICD-10-CM lookup is a useful tool for verifying current code validity within each category.

L65.8 vs. L65.9: When to use each code

The difference between L65.8 and L65.9 is documentation, not diagnosis. Both codes apply only once the more specific, named-mechanism codes in the L65 family — L65.0 (telogen effluvium), L65.1 (anagen effluvium), L65.2 (alopecia mucinosa) — have been ruled out. The decision rule is simple:

• Use L65.8 when the clinician has named a specific type of nonscarring hair loss that doesn’t have its own L65 code (e.g., “traction alopecia,” “loose anagen syndrome”).
• Use L65.0, L65.1, or L65.2 instead of L65.8 when the named condition is telogen effluvium, anagen effluvium, or alopecia mucinosa — each has its own dedicated code.
• Use L65.9 when the record documents hair loss that is nonscarring but does not identify the specific type, or when the type cannot be determined from available clinical information.

L65.9 should never be used as the default code to avoid specificity work. If the clinician’s note contains a named condition, code it to the matching L65 subcode — L65.0, L65.1, L65.2, or L65.8. According to the ICD-10-CM Official Guidelines for Coding and Reporting, coders must code to the highest level of specificity supported by the documentation.

That expectation isn’t unique to dermatology. Codes such as Y90.9 carry the same rule: the record has to name the specific circumstance rather than settle for a general descriptor.

Documentation requirements for L65.8

Clean claims for ICD-10 Code L65.8 depend on documentation that establishes three things: the hair loss is nonscarring, the specific type is named, and any causative factors are noted. Documentation best practices apply regardless of specialty, and structured clinical forms help capture these elements systematically at every visit.

The minimum documentation checklist to support L65.8 includes:

• Named condition: The specific hair loss type must appear in the assessment (e.g., “traction alopecia,” “loose anagen syndrome”). If the named condition is telogen effluvium or anagen effluvium, code it to L65.0 or L65.1 instead of L65.8.
• Nonscarring confirmation: Clinical exam or dermoscopy findings confirming intact follicles and absence of fibrosis or scarring. A biopsy report confirming nonscarring histology strengthens the claim further.
• Clinical findings: Hair pull test results, distribution pattern (diffuse, frontotemporal, parietal), shedding rate, or hair shaft characteristics where relevant.
• Causative factor: Where identified, document the trigger (mechanical hairstyling, postpartum state, thyroid disorder, nutritional deficiency). Assign an additional code for the underlying cause when it is documented.
• Timeline: Acute versus chronic presentation affects treatment and supports medical necessity.

Using digital intake forms that capture hair loss history systematically at consultation catches missing details before the appointment even ends.

Common coding errors and how to avoid them

Alopecia coding generates a consistent set of errors across dermatology and general practice. Familiarity with dermatology EMR workflows that flag coding inconsistencies at point of care catches most of these before claims go out. The most frequent errors are:

• Defaulting to L65.9 unnecessarily. The most common error. When the physician has documented a named hair loss type, coders must use the matching specific code, not L65.9. Review the assessment section and clinical impression before assigning the unspecified code.
• Coding telogen effluvium or anagen effluvium to L65.8. Both have their own dedicated codes — L65.0 for telogen effluvium and L65.1 for anagen effluvium — and should never be reported under the L65.8 residual.
• Using L65.8 for alopecia areata. Alopecia areata (patchy, autoimmune) belongs to the L63.x category, not L65.8. Confusing the two is a specificity error that may trigger a query.
• Using L65.8 for androgenic alopecia. Male and female pattern hair loss codes to L64.x (androgenic alopecia). These are hormonally driven conditions with their own dedicated category.
• Missing the causative factor code. When telogen effluvium (L65.0) is secondary to a documented condition (postoperative state, thyroid dysfunction), ICD-10-CM guidelines require coding the underlying cause as well. Submitting only L65.0 without the etiology code is an incomplete claim.
• Miscoding end-stage traction alopecia. If biopsy or dermoscopy confirms follicular fibrosis, the code block shifts from L65.x to L66.x. Using L65.8 for confirmed scarring alopecia is a clinical accuracy error.
• Miscoding chemotherapy-induced anagen effluvium. Chemo-induced anagen effluvium codes to L65.1, plus an additional code from T36-T50 (adverse effect, 5th or 6th character 5) identifying the causative drug. It is not L65.8, and it is not a generic neoplasm-treatment code.

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Using L65.8 in dermatology practice management

Billing for nonscarring hair loss conditions requires more than selecting the right code. The full revenue cycle for L65.8 claims spans documentation capture, code assignment, claim submission, and denial management. Practices that integrate ICD-10 coding workflows into their hair clinic software system keep clinical notes and claims aligned, reducing mismatches between documentation and what goes on the claim.

A few operational realities worth noting for L65.8:

• DRG grouping: L65.8, along with the rest of the L65 family, groups to MS-DRG 606 (Minor skin disorders with MCC) or 607 (Minor skin disorders without MCC), depending on any additional diagnoses submitted on the claim and the presence of complications or comorbidities (CC/MCC). DRG assignments are updated annually by CMS, so verify current groupings before FY budgeting.
• Paired CPT codes: L65.8 is commonly paired with evaluation and management (E&M) codes (such as 99213 or 99214) for dermatology office visits, or with procedural codes for hair pull tests, dermoscopy, scalp biopsy, or lesion shaving such as CPT 11308. The appropriate CPT code depends on the service performed and payer policy, not a universal pairing rule.
• Payer policies: Some payers require prior authorization or specific diagnosis-to-procedure code matching for hair loss treatments beyond E&M services. Check individual payer local coverage determinations (LCDs) when billing treatment beyond diagnostic workup.

Pabau supports the ICD-10 documentation workflow for dermatology practices, from hair clinic patient experience through to structured clinical notes that keep the diagnosis and the medical-necessity narrative audit-ready. Structured intake and clinical note templates reduce the missing details that cause L65.8, L65.0, and L65.1 claims to be downgraded to L65.9 or denied outright.

Conclusion

ICD-10 Code L65.8 is one of the more documentation-dependent codes in dermatology. It only applies when the hair loss is nonscarring, the specific type is named, and the notes confirm the clinical basis. The single most common error is assigning L65.9 when the physician has already documented the specific condition. Catching that before the claim goes out requires coders and clinicians to align on what goes in the note.

Pabau’s structured clinical documentation tools help dermatology and aesthetics practices capture the specificity that L65.8 requires, directly within the patient record workflow. If your practice sees hair loss patients regularly and wants cleaner claims from the first submission, see how Pabau helps.

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