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A42.9

Billable

Actinomycosis, unspecified

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

Actinomycosis is a rare bacterial infection caused by Actinomyces organisms that can affect various parts of the body, including the jaw, lungs, or abdomen. This code is used when the specific site of infection is not documented or specified.

Coding Tips

  • •Query the provider if the site of actinomycosis is documented elsewhere in the medical record, as more specific codes (A42.0-A42.8) provide better clinical detail and may affect treatment planning
  • •Actinomycosis is typically treated with prolonged antibiotic therapy; ensure documentation supports the diagnosis and consider whether a more specific anatomical site code would be more appropriate

Code Hierarchy

└A42Actinomycosis└A42.9Actinomycosis, unspecified
└A42.9Actinomycosis, unspecified

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