Gangosa

Gangosa is a destructive, ulcerative lesion of the nose, mouth, and palate, typically associated with late-stage yaws. It involves progressive tissue loss, leading to severe disfigurement of the midface. This condition is a chronic manifestation of Treponema pallidum pertenue infection.

Use this code when documentation explicitly states a diagnosis of gangosa. This diagnosis is typically made based on characteristic clinical presentation in a patient with a history of yaws or positive serological tests for treponemal infection. Ensure the medical record clearly describes the destructive lesions of the nasopharyngeal region.

• Confirm the diagnosis of gangosa; do not code based on general facial disfigurement alone.
• Consider sequencing this code after the underlying infectious disease (yaws, A66.9) if documented as the primary reason for the encounter.
• Review documentation for any associated complications or sequelae that may require additional coding.