A31.9
ICD-10-CMThis code signifies an infection caused by mycobacteria when the specific type of mycobacterium is not identified in the medical record. It indicates the presence of a mycobacterial disease without further specification of the causative organism, such as Mycobacterium tuberculosis or non-tuberculous mycobacteria (NTM).
This code is appropriate when a diagnosis of mycobacterial infection is confirmed, but the physician documentation does not specify the particular species. It can be used when laboratory results indicate mycobacterial growth, but further identification is pending or not performed. Documentation should clearly state "mycobacterial infection, unspecified" or similar.
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