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A31 Infection due to other mycobacteria

ICD-10-CM category A31 sits in Chapter 1 (Certain infectious and parasitic diseases, A00-B99). It contains 5 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.

Billable codes in A31

CodeDescription
A31.0Pulmonary mycobacterial infection
A31.1Cutaneous mycobacterial infection
A31.2Disseminated mycobacterium avium-intracellulare complex (DMAC)
A31.8Other mycobacterial infections
A31.9Mycobacterial infection, unspecified

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