A31.9 is the ICD-10 code for Mycobacterial infection, unspecified. It is a four-character subcategory of A31 (Infection due to other mycobacteria), the most specific level in the WHO edition. It belongs to the block A30–A49 (Other bacterial diseases) in Chapter I, Certain infectious and parasitic diseases.
- Code type
- Subcategory (4 characters)
- Chapter
- I · A00–B99
- Classification
- WHO ICD-10, 2019 version
What A31.9 includes
Conditions and terms that are coded here.
- Atypical mycobacterium infection NOS
- Mycobacteriosis NOS
A31.9 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
A31.9Uspesifisert infeksjon som skyldes mykobakterie
DA319Mykobakteriel infektion UNS
A31.9Määrittämätön mykobakteeri-infektio
A31.9Infektion durch Mykobakterien, nicht näher bezeichnet
A31.9Infection à Mycobacterium, sans précision
A31.9Mycobacterium-infectie, niet-gespecificeerd
A31.9Mycobacterial infection, unspecified
Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.
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