Actinomycetoma

This code represents actinomycetoma, a chronic, progressively destructive subcutaneous infection caused by filamentous bacteria of the genus Actinomyces. It typically manifests as localized swelling, draining sinuses, and granulomatous lesions, often affecting the extremities or head and neck.

Use this code when documentation clearly indicates a diagnosis of actinomycetoma. This diagnosis is typically confirmed by microbiological culture, histopathology showing characteristic sulfur granules, or molecular methods. Documentation should specify the presence of this specific bacterial etiology rather than a fungal cause.

• Differentiate from eumycetoma (mycetoma caused by fungi), which codes to B48.1.
• Ensure documentation specifies Actinomyces as the causative agent; otherwise, consider an unspecified mycetoma code if the etiology is unknown.
• Code any associated complications, such as osteomyelitis or sepsis, in addition to the primary diagnosis.