ICD-10 Code L73.2 – Hidradenitis suppurativa (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L73.2 – Hidradenitis suppurativa
What it is
Hidradenitis suppurativa is a chronic inflammatory skin disorder that causes recurrent painful nodules, abscesses, and scarring, usually in areas where skin rubs together. It commonly affects the axillae, groin, and inframammary folds.
Clinical signs
Look for recurrent tender lumps, draining sinus tracts, and scar formation in intertriginous areas. Clinical features vary; refer to documentation if the record does not clearly describe the affected sites or chronicity.
When to use this code
Use L73.2 when the provider documents hidradenitis suppurativa or HS as the diagnosis. It is appropriate for active disease and for visits focused on ongoing management of this chronic condition. Code the condition only when the documentation supports the diagnosis.
Do not use for
Do not use this code for a simple skin abscess, boil, or cellulitis without documentation of hidradenitis suppurativa. If the note is unclear, check documentation before assigning the code.
Coding tip
Confirm that the record identifies hidradenitis suppurativa specifically, not just a recurrent abscess, before you code L73.2.