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 A31.9

2023 ICD-10-CM Diagnosis Code A31.9

Mycobacterial infection, unspecified

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

• A31.9 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 A31.9 became effective on October 1, 2022.
• This is the American ICD-10-CM version of A31.9 - other international versions of ICD-10 A31.9 may differ.

• Atypical mycobacterial infection
• Atypical mycobacterial infection of hand
• Bilateral mycobacterial keratitis
• Keratitis, mycobacteria
• Left mycobacterial keratitis
• Mycobacteria, hand, atypical
• Mycobacterial infection
• Mycobacterial infection, atypical
• Mycobacterial keratitis
• Mycobacteriosis
• Right mycobacterial keratitis

• Infections with bacteria of the genus mycobacterium.
• Infections with nontuberculous mycobacteria (atypical mycobacteria): m. Kansasii, m. Marinum, m. Scrofulaceum, m. Flavescens, m. Gordonae, m. Obuense, m. Gilvum, m. Duvali, m. Szulgai, m. Intracellulare (see mycobacterium avium complex;), m. Xenopi (littorale), m. Ulcerans, m. Buruli, m. Terrae, m. Fortuitum (minetti, giae), m. Chelonae.
• Mycobacteria are a type of germ. There are many different kinds. The most common one causes tuberculosis. Another one causes leprosy. Still others cause infections that are called atypical mycobacterial infections. They aren't "typical" because they don't cause tuberculosis. But they can still harm people, especially people with other problems that affect their immunity, such as aids.sometimes you can have these infections with no symptoms at all. At other times, they can cause lung symptoms similar to tuberculosis:
  • cough
  • weight loss
  • coughing up blood or mucus
  • weakness or fatigue
  • fever and chills
  • night sweats
  • lack of appetite and weight loss
  medicines can treat these infections, but often more than one is needed to cure the infection.

• 867 Other infectious and parasitic diseases diagnoses with mcc
• 868 Other infectious and parasitic diseases diagnoses with cc
• 869 Other infectious and parasitic diseases diagnoses without cc/mcc
• 974 Hiv with major related condition with mcc
• 975 Hiv with major related condition with cc
• 976 Hiv with major related condition without cc/mcc

Convert A31.9 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

• Disease, diseased - see also Syndrome
  • photochromogenic (acid-fast bacilli) (pulmonary) A31.0
    ICD-10-CM Diagnosis Code A31.0

    Pulmonary mycobacterial infection

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

    Applicable To

    • Infection due to Mycobacterium avium
    • Infection due to Mycobacterium intracellulare [Battey bacillus]
    • Infection due to Mycobacterium kansasii
    • nonpulmonary A31.9
• Mycobacterium, mycobacterial (infection) A31.9
  • atypical A31.9
  • anonymous A31.9

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