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A31

⚠ Non-billable (Header)

Infection due to other mycobacteria

Certain infectious and parasitic diseases (A00-B99)

⚠️ This is a category header code — not billable. Use a more specific child code below.

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⚠️ Excludes2

direct

May be coded together if both conditions coexist

  • • leprosy (A30.-)
  • • tuberculosis (A15-A19)

Child Codes (5)

A31.0Pulmonary mycobacterial infectionA31.1Cutaneous mycobacterial infectionA31.2Disseminated mycobacterium avium-intracellulare complex (DMAC)A31.8Other mycobacterial infectionsA31.9Mycobacterial infection, unspecified

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Code Information

CodeA31
BillableNo — Header code
CategoryCertain infectious and parasitic diseases (A00-B99)
Excludes10 rule(s)
Excludes22 note(s)
Child codes5

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)