ICD-10 Code A66.5 – Gangosa (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A66.5 – Gangosa
What it is
Gangosa is a late manifestation of yaws that affects the nose, mouth, and upper face. It typically causes destructive changes in the soft tissues and nearby structures.
Clinical signs
Clinical features vary; refer to documentation. Common findings include chronic ulceration, tissue destruction, nasal discharge, and deformity of the nose or palate in advanced cases.
When to use this code
Use A66.5 when the record clearly documents gangosa or destructive yaws involving the nose and midface. Code it when the provider identifies this specific late complication, not just yaws in general. If the note only says suspected or historical yaws, check documentation.
Do not use for
Do not use this code for uncomplicated yaws, other infectious rhinitis, or nonspecific nasal deformity without a documented gangosa diagnosis. Check documentation if the site or cause is unclear.
Coding tip
Assign A66.5 only when the clinician names gangosa or describes classic destructive yaws changes.