1. ICD-10-CM Codes
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2. A00-B99
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3. A30-A49
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4. A31-
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5. 2023 ICD-10-CM Diagnosis Code A31.1

2023 ICD-10-CM Diagnosis Code A31.1

Cutaneous mycobacterial infection

2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

• A31.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2023 edition of ICD-10-CM A31.1 became effective on October 1, 2022.
• This is the American ICD-10-CM version of A31.1 - other international versions of ICD-10 A31.1 may differ.

• Buruli ulcer
• Cutaneous infectious disease due to mycobacteria
• Cutaneous mycobacterium marinum infection
• Mycobacteria infection of skin
• Mycobacterium marinum infection of skin

• A cutaneous infection caused by mycobacterium ulcerans. It presents with painless nodular swelling of the skin, leading to the formation of necrotizing ulcers.
• A lesion in the skin and subcutaneous tissues due to infections by mycobacterium ulcerans. It was first reported in uganda, africa.

• 606 Minor skin disorders with mcc
• 607 Minor skin disorders without mcc

Convert A31.1 to ICD-9-CM

• 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
• 2017 (effective 10/1/2016): No change
• 2018 (effective 10/1/2017): No change
• 2019 (effective 10/1/2018): No change
• 2020 (effective 10/1/2019): No change
• 2021 (effective 10/1/2020): No change
• 2022 (effective 10/1/2021): No change
• 2023 (effective 10/1/2022): No change

• Buruli ulcer A31.1
• Disease, diseased - see also Syndrome
  • swimming-pool granuloma A31.1
• Granuloma L92.9
  ICD-10-CM Diagnosis Code L92.9

  Granulomatous disorder of the skin and subcutaneous tissue, unspecified

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

  Type 2 Excludes

  • umbilical granuloma (P83.81)
  • swimming pool A31.1
• Infection, infected, infective (opportunistic) B99.9
  ICD-10-CM Diagnosis Code B99.9

  Unspecified infectious disease

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • Bacillus A49.9
    ICD-10-CM Diagnosis Code A49.9

    Bacterial infection, unspecified

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Type 1 Excludes

    • bacteremia NOS (R78.81)
    • swimming pool A31.1
  • swimming pool bacillus A31.1
• Mycobacterium, mycobacterial (infection) A31.9
  ICD-10-CM Diagnosis Code A31.9

  Mycobacterial infection, unspecified

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

  Applicable To

  • Atypical mycobacterial infection NOS
  • Mycobacteriosis NOS
  • atypical A31.9
    ICD-10-CM Diagnosis Code A31.9

    Mycobacterial infection, unspecified

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Atypical mycobacterial infection NOS
    • Mycobacteriosis NOS
    • cutaneous A31.1
  • balnei A31.1
  • cutaneous A31.1
  • luciflavum A31.1
  • marinum A31.1 (M. balnei)
  • ulcerans A31.1
• Ulcer, ulcerated, ulcerating, ulceration, ulcerative
  • skin (atrophic) (chronic) (neurogenic) (non-healing) (perforating) (pyogenic) (trophic) (tropical) L98.499
    ICD-10-CM Diagnosis Code L98.499

    Non-pressure chronic ulcer of skin of other sites with unspecified severity

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    • mycobacterial A31.1
  • Buruli A31.1
  • mycobacterial A31.1 (skin)

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.