ICD-10 Code L72.9 – Follicular cyst of the skin and subcutaneous tissue, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L72.9 – Follicular cyst of the skin and subcutaneous tissue, unspecified
What it is
L72.9 identifies an unspecified follicular cyst in the skin or subcutaneous tissue. Use it when the record documents a follicular or epidermoid-type cyst but does not specify the exact type or site.
Clinical signs
These cysts usually appear as a slow-growing, round, movable skin lump. They may be firm or fluctuant, and clinical features vary; refer to documentation.
When to use this code
Use L72.9 when the provider documents a follicular cyst and does not name a more specific diagnosis. It also fits when the note confirms a cyst of the skin or subcutaneous tissue without further detail. If the site or cyst type is specified, code that more precise option instead.
Do not use for
Do not use this code for abscesses, inflamed lesions, or other non-cyst skin masses. Do not use it when the documentation clearly identifies a different cyst type or a more specific site.
Coding tip
Check the assessment and pathology wording carefully; if the cyst is named more specifically, choose the precise code.