Syphilitic alopecia

This code represents hair loss specifically caused by a syphilis infection. It typically manifests as patchy, moth-eaten alopecia and is a less common but recognized symptom of secondary syphilis.

Use this code when documentation clearly indicates alopecia as a direct result of syphilis. This diagnosis is supported by positive serological tests for syphilis and a clinical presentation of hair loss consistent with syphilitic alopecia.

• Ensure the medical record explicitly links the alopecia to syphilis, not other causes of hair loss.
• Always code the underlying syphilis infection first (e.g., A51.x for secondary syphilis) followed by this code.
• Distinguish from other forms of non-scarring alopecia, which have different ICD-10-CM codes.