Specific code icon 2014 ICD-10-CM Diagnosis Code A31.9

Mycobacterial infection, unspecified

  • A31.9 is a billable ICD-10-CM code that can be used to specify a diagnosis.
  • On October 1, 2015 ICD-10-CM will replace ICD-9-CM in the United States, therefore, A31.9 and all other ICD-10-CM codes should only be used for training or planning purposes until then.
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.
Applicable To
  • Atypical mycobacterial infection NOS
  • Mycobacteriosis NOS
Description Synonyms
  • Atypical mycobacterial infection
  • Atypical mycobacterial infection of hand
  • Keratitis, mycobacteria
  • Mycobacteria, hand, atypical
  • Mycobacterial infection
  • Mycobacterial infection, atypical
  • Mycobacterial keratitis
  • Mycobacteriosis
Mortality Data
  • Between 1999-2007 there were 373 deaths in the United States where ICD-10 A31.9 was indicated as the underlying cause of death [source: cdc.govlink to cdc.gov]
  • ICD-10 A31.9 as underlying cause of death data broken down by: gender, age, race, year
ICD-10-CM A31.9 is grouped within Diagnostic Related Group(s) (MS-DRG v30.0):
  • 867 Other infectious & parasitic diseases diagnoses with mcc
  • 868 Other infectious & parasitic diseases diagnoses with cc
  • 869 Other infectious & 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 ICD-10-CM A31.9 to ICD-9-CM
The following ICD-10-CM Index entries contain back-references to ICD-10-CM A31.9: