A31.1 Cutaneous mycobacterial infection

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applicable to

• Buruli ulcer
• Infection due to Mycobacterium marinum
• Infection due to Mycobacterium ulcerans

Applies from A31 Infection due to other mycobacteria

Excludes2 (not included here)

• leprosy (A30.-)
• tuberculosis (A15-A19)

MS-DRG index

Defines the logic of DRG(s) 606-607 in MDC 09.

Approximate ICD-9-CM (GEMs)

• 031.1 Cutaneous diseases due to other mycobacteria

Diagnosis Index entries for A31.1

• Buruli ulcer
• Disease, diseased › swimming-pool granuloma
• Granuloma › swimming pool
• Infection, infected, infective (opportunistic) › Bacillus › swimming pool
• Infection, infected, infective (opportunistic) › swimming pool bacillus
• Mycobacterium, mycobacterial (infection) › atypical › cutaneous
• Mycobacterium, mycobacterial (infection) › balnei
• Mycobacterium, mycobacterial (infection) › cutaneous
• Mycobacterium, mycobacterial (infection) › luciflavum
• Mycobacterium, mycobacterial (infection) › marinum (M. balnei)
• Mycobacterium, mycobacterial (infection) › ulcerans
• Ulcer, ulcerated, ulcerating, ulceration, ulcerative › Buruli
• Ulcer, ulcerated, ulcerating, ulceration, ulcerative › mycobacterial (skin)
• Ulcer, ulcerated, ulcerating, ulceration, ulcerative › skin (atrophic) (chronic) (neurogenic) (non-healing) (perforating) (pyogenic) (trophic) (tropical) › mycobacterial

Nearby codes

• A31 Infection due to other mycobacteria
• A31.0 Pulmonary mycobacterial infection
• A31.1 Cutaneous mycobacterial infection (this code)
• A31.2 Disseminated mycobacterium avium-intracellulare complex (DMAC)
• A31.8 Other mycobacterial infections
• A31.9 Mycobacterial infection, unspecified