2024 ICD-10-CM Diagnosis Code A31.9

by

Mycobacterial infection, unspecified

  • A31.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2024 edition of ICD-10-CM A31.9 became effective on October 1, 2023.
  • This is the American ICD-10-CM version of A31.9 – other international versions of ICD-10 A31.9 may differ.

Applicable To

  • Atypical mycobacterial infection NOS
  • Mycobacteriosis NOS

The following code(s) above A31.9 contain annotation back-references

 that may be applicable to A31.9:

  • A00-B99  Certain infectious and parasitic diseases
  • A31  Infection due to other mycobacteria

Approximate Synonyms

  • 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

Clinical Information

  • 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.

ICD-10-CM A31.9 is grouped within Diagnostic Related Group(s) (MS-DRG v41.0):

  • 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-CMCode History

  • 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
  • 2024 (effective 10/1/2023): No change

Diagnosis Index entries containing back-references to A31.9: