All ICD10 Codes

A31

Non-Billable
ChapterA00–B99
Rankcategory
Official Description

Infection due to other mycobacteria

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 1: Certain Infectious and Parasitic Diseases (A00-B99).

CH1 Parent Instructions

Includes
  • diseases generally recognized as communicable or transmissible
Excludes1(Not coded here)
  • certain localized infections - see body system-related chapters
Excludes2(Not included here)
  • carrier or suspected carrier of infectious disease (Z22.-)
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)
Use Additional Code
  • code to identify resistance to antimicrobial drugs (Z16.-)

Instructional Notes

Excludes2(Not included here)

Clinical Hierarchy

CH1Certain infectious and parasitic diseases (A00-B99)
A30-A49Other bacterial diseases (A30-A49)
A31Infection due to other mycobacteria
A31.0Pulmonary mycobacterial infection
A31.1Cutaneous mycobacterial infection
A31.2Disseminated mycobacterium avium-intracellulare complex (DMAC)
A31.8Other mycobacterial infections
A31.9Mycobacterial infection, unspecified

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to A31:

chapterCH1
Certain infectious and parasitic diseases (A00-B99)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to A31. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

25 raw paths
Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute)1 unique routes
due to or associated with
mycobacteria→A31
Battey Mycobacterium infection1 unique routes
Direct index entry→A31
Buruli ulcer1 unique routes
Direct index entry→A31
Complex1 unique routes
disseminated mycobacterium avium- intracellulare (DMAC)→A31
Disease, diseased4 unique routes
Battey→A31
photochromogenic (acid-fast bacilli) (pulmonary)→A31(2 variants)
nonpulmonary→A31
swimming-pool granuloma→A31
DMAC (disseminated mycobacterium avium- intracellulare complex)1 unique routes
Direct index entry→A31
Granuloma1 unique routes
swimming pool→A31
Infection, infected, infective (opportunistic)3 unique routes
Bacillus
swimming pool→A31
lung
atypical Mycobacterium→A31
swimming pool bacillus→A31
Lymphadenitis1 unique routes
mycobacterial→A31
Mycobacterium, mycobacterial (infection)11 unique routes
Direct index entry→A31
anonymous→A31
atypical→A31(4 variants)
cutaneous→A31
pulmonary→A31
specified site NEC→A31
avium (intracellulare complex)→A31
balnei→A31
Battey→A31
chelonei→A31
cutaneous→A31

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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