A31.9
ICD-10BillableMycobacterial infection, unspecified
Official ICD-10-CM descriptor (FY2026)
Mycobacterial infection, unspecified
A31.9 is valid for submission on a claim — CMS flags it as a billable, specific code.
Inclusion terms
- Atypical mycobacterial infection NOS
- Mycobacteriosis NOS
Related codes in A31
Where this code sits
- Parent code
- A31
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.