A31.9

What This Code Means

This code is used when a patient has a mycobacterial infection (caused by mycobacterium bacteria) but the specific type of mycobacterium has not been identified or documented. Mycobacterial infections can affect the lungs, skin, or other parts of the body.

Coding Tips

• •Use this code only when the specific mycobacterial organism cannot be determined; always attempt to obtain culture results or additional testing to assign a more specific A31 code (such as A31.0 for pulmonary mycobacterial infection or A31.8 for other specified mycobacterial infections)
• •Review the clinical documentation and laboratory reports carefully to see if the mycobacterium type was identified at any point during the patient's care, as this would allow for more specific coding