Syphilis of lung

This code identifies a specific manifestation of syphilis affecting the pulmonary system. It describes the presence of syphilitic lesions, gummas, or other pathological changes directly attributable to Treponema pallidum infection within the lung tissue. This is a tertiary stage manifestation of the disease.

Use this code when documentation explicitly states a diagnosis of "syphilis of the lung" or "pulmonary syphilis." This diagnosis is typically supported by imaging findings (e.g., chest X-ray, CT scan showing lung lesions), serological tests confirming syphilis, and potentially biopsy results.

• Always code the underlying syphilis (e.g., 097.9 for unspecified syphilis) as the primary diagnosis if not already specified as tertiary.
• Distinguish from other infectious or neoplastic lung conditions; documentation must clearly link the lung pathology to syphilis.
• Do not use for congenital syphilis affecting the lungs, which has separate codes.