A31: Infection due to other mycobacteria
Codes under A31 (Infection due to other mycobacteria). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| A31.0 | Pulmonary mycobacterial infection | ✓ |
| A31.0 | Pulmonary mycobacterial infection | ✓ |
| A31.1 | Cutaneous mycobacterial infection | ✓ |
| A31.1 | Cutaneous mycobacterial infection | ✓ |
| A31.2 | Disseminated mycobacterium avium-intracellulare complex (DMAC) | ✓ |
| A31.2 | Disseminated mycobacterium avium-intracellulare complex (DMAC) | ✓ |
| A31.8 | Other mycobacterial infections | ✓ |
| A31.8 | Other mycobacterial infections | ✓ |
| A31.9 | Mycobacterial infection, unspecified | ✓ |
| A31.9 | Mycobacterial infection, unspecified | ✓ |
Frequently asked questions
What is ICD-10-CM code A31?
A31 is an ICD-10-CM category covering Infection due to other mycobacteria. It contains 10 more specific diagnosis codes, 10 of which are billable.
Is A31 a billable code?
No — A31 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example A31.0 — Pulmonary mycobacterial infection). 10 of the 10 codes under A31 are billable.
What codes fall under A31?
A31 includes A31.0, A31.0, A31.1, A31.1, A31.2, plus 5 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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