ICD-10 Code A31.2 – Disseminated mycobacterium avium-intracellulare complex (DMAC) (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A31.2 – Disseminated mycobacterium avium-intracellulare complex (DMAC)
What it is
A31.2 identifies disseminated infection caused by Mycobacterium avium-intracellulare complex. Use it when the infection has spread beyond a single local site and documentation supports systemic disease.
Clinical signs
Clinical features vary; refer to documentation. Typical records may describe widespread infection with constitutional symptoms, organ involvement, or positive mycobacterial findings consistent with dissemination.
When to use this code
Use A31.2 when the provider documents disseminated MAC, DMAC, or generalized Mycobacterium avium-intracellulare infection. It is appropriate when the chart clearly states the infection is not limited to one body site. Check documentation if the record only mentions colonization, exposure, or a localized nontuberculous mycobacterial infection.
Do not use for
Do not use this code for localized MAC infection or for unspecified mycobacterial disease. If the note does not confirm dissemination, check documentation before assigning A31.2.
Coding tip
Code A31.2 only when “disseminated” is explicitly documented or clearly supported by the provider’s assessment.