ICD-10 Code L81.6 – Other disorders of diminished melanin formation (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L81.6 – Other disorders of diminished melanin formation
What it is
L81.6 identifies a disorder where the skin has reduced melanin production or loss of normal pigmentation. Use it for documented hypopigmentation or diminished melanin formation when the record does not specify a more exact diagnosis.
Clinical signs
Typical findings include lighter-than-normal skin patches or areas of decreased pigmentation. Clinical features vary; refer to documentation, and confirm whether the provider describes a diffuse or localized pigment reduction.
When to use this code
Use this code when the clinician documents diminished melanin formation, hypopigmentation, or another nonspecific pigment-loss disorder without naming a more specific condition. It may also fit when the note describes abnormal skin lightening and no alternate diagnosis is stated.
Check documentation if the cause is clearly identified, such as a congenital syndrome, inflammatory change, or postinflammatory pigment loss, because a more specific code may apply. Code only what the provider documents.
Do not use for
Do not use L81.6 for vitiligo, albinism, or other specifically named pigment disorders when those diagnoses are documented. Do not assign it when the chart only mentions a temporary rash or skin color change without a disorder of melanin formation.
Coding tip
Look for the provider’s exact wording; if the note gives a named pigment disorder, choose that code instead of this nonspecific one.