A17.9 — Tuberculosis of nervous system, unspecified
A17.9 is a billable, specific ICD-10-CM code for tuberculosis of nervous system, unspecified. It is valid for submission on a claim.
Risk adjustment
A17.9 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
A17.9 is named in 10 Medicare coverage policies — 10 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56416Billing and Coding: Assays for Vitamins and Metabolic Function
- A56612Billing and Coding: CT of the Head
- A56841Billing and Coding: Vitamin D; 25 hydroxy, includes fraction(s), if performed
- A57484Billing and Coding: Vitamin D Assay Testing
How A17.9 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to A17.9.
- Tuberculosis, tubercular, tuberculous›nervous system
Related codes at this level
Codes that share A17. If A17.9 is not quite right, the correct code is usually one of these.
Questions about A17.9
- Is A17.9 a billable ICD-10-CM code?
- Yes. A17.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does A17.9 sit in the tabular list?
- Certain infectious and parasitic diseases (A00-B99), in the block Tuberculosis (A15-A19).