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ICD-10-CM 2027 diagnosis code

A31.2Disseminated mycobacterium avium-intracellulare complex (DMAC)

✓ Billable / specificCC — complication/comorbidity

A31.2 is a valid, billable ICD-10-CM code for disseminated mycobacterium avium-intracellulare complex (dmac). It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Dissem mycobacterium avium-intracellulare complex (DMAC)

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About A31.2

A31.2 is the ICD-10-CM diagnosis code for disseminated mycobacterium avium-intracellulare complex (DMAC). It belongs to category A31 (infection due to other mycobacteria), block A30-A49 (other bacterial diseases) and chapter 1 (certain infectious and parasitic diseases). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within A31 (infection due to other mycobacteria), A31.2 is specifically for disseminated mycobacterium avium-intracellulare complex (DMAC). Related codes cover pulmonary mycobacterial infection (A31.0), cutaneous mycobacterial infection (A31.1), other mycobacterial infections (A31.8) and mycobacterial infection, unspecified (A31.9).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 867 (Other Infectious and Parasitic Diseases Diagnoses with MCC, relative weight 2.1859), DRG 868 (Other Infectious and Parasitic Diseases Diagnoses with CC, relative weight 1.0235), DRG 869 (Other Infectious and Parasitic Diseases Diagnoses without CC/MCC, relative weight 0.6787), DRG 974 (HIV with Major Related Condition with MCC, relative weight 3.0506), DRG 975 (HIV with Major Related Condition with CC, relative weight 1.3252) and DRG 976 (HIV with Major Related Condition without CC/MCC, relative weight 0.8124), in MDC 18 (Infectious and Parasitic Diseases, Systemic or Unspecified Sites) and MDC 25 (Human Immunodeficiency Virus Infections), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 031.2 (disseminated due to other mycobacteria).

Coding notes

Applicable toConditions and synonyms classified to this code
  • MAC sepsis

Notes that apply from higher levels

Instructions written at a parent level also apply to A31.2.

› From A31 Infection due to other mycobacteria
Excludes2

Broader instructions also apply from Chapter 1: Certain infectious and parasitic diseases.

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to A31.2.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 031.2Disseminated due to other mycobacteriaexact

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about A31.2

Is A31.2 billable?

Yes. A31.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can A31.2 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict A31.2 as a principal diagnosis.

Is A31.2 a CC or MCC?

A31.2 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does A31.2 group to?

A31.2 is used in the MS-DRG v44.0 logic for MS-DRG 867 (Other Infectious and Parasitic Diseases Diagnoses with MCC), MS-DRG 868 (Other Infectious and Parasitic Diseases Diagnoses with CC), MS-DRG 869 (Other Infectious and Parasitic Diseases Diagnoses without CC/MCC), MS-DRG 974 (HIV with Major Related Condition with MCC), MS-DRG 975 (HIV with Major Related Condition with CC) and MS-DRG 976 (HIV with Major Related Condition without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for A31.2?

The CMS General Equivalence Mappings map A31.2 to ICD-9-CM 031.2.