Infection due to other mycobacteria (A31) ICD-10-CM
The A31 code range covers infection due to other mycobacteria with 6 ICD-10-CM diagnosis codes. 5 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Codes in the A31 Range 6 codes · 5 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the A31 range.
Buruli Ulcer
A lesion in the skin and subcutaneous tissues due to infections by MYCOBACTERIUM ULCERANS. It was first reported in Uganda, Africa.
Mycobacterial Infection
Infection due to organisms from the genus Mycobacteria.
About the A31 Code Range
These infections involve other mycobacteria. The subdivisions identify infections by body site, a disseminated form, or how specifically the infection is named.
A31.0 identifies lung infections, while A31.1 identifies skin infections. A31.2 names disseminated mycobacterium avium-intracellulare complex (DMAC), meaning an infection spread beyond one location. A31.8 is for other mycobacterial infections, and A31.9 is for mycobacterial infection that is unspecified.
Questions About This Page
How many billable codes are in the A31 range?
Of the 6 codes in this range, 5 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the A31 range classify?
The range classifies infection due to other mycobacteria. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
