2025 ICD-10-CM code A31.9
(Active) Effective Date: N/A Certain infectious and parasitic diseases - Other bacterial diseases 1 Feed
Mycobacterial infection, unspecified.
Medical necessity is established by the confirmed presence of a mycobacterial infection not attributable to tuberculosis or leprosy. The documentation should support the need for treatment and further investigation to identify the species, if possible.
Patients with unspecified mycobacterial infections can be asymptomatic or experience symptoms such as cough, weakness, fever and chills, night sweats, loss of appetite, and weight loss. Severe infections may affect various organs. Diagnosis involves laboratory analysis of biopsy specimens, cultures, and smears for acid-fast bacilli, as well as CBC and other diagnostic procedures.
In simple words: This code refers to an infection caused by a type of bacteria called mycobacteria, but the specific type isn't known.It's important to note that this doesn't include infections like tuberculosis or leprosy, which are caused by specific types of mycobacteria.
Infection due to mycobacteria, not otherwise specified. This excludes leprosy (A30.-) and tuberculosis (A15-A19).
Example 1: A patient presents with cough, fever, and weight loss. Cultures test positive for Mycobacterium, but the species cannot be identified. The infection is not consistent with tuberculosis or leprosy., A patient with a compromised immune system develops skin lesions. Biopsy reveals mycobacterial infection, but further testing is inconclusive regarding the specific species. The infection is not tuberculosis or leprosy., A patient develops an infection after surgery, and cultures grow Mycobacterium other than tuberculosis.The specific species cannot be identified through available lab testing.
Documentation should include evidence of mycobacterial infection from laboratory tests, ruling out tuberculosis and leprosy. Symptoms, physical exam findings, and other diagnostic test results supporting the diagnosis should also be documented.
- Specialties:Infectious Disease, Internal Medicine, Family Medicine, Dermatology
- Place of Service:Inpatient Hospital, On Campus-Outpatient Hospital, Office, Independent Clinic