ICD-10-CM 2027 diagnosis code

A17Tuberculosis of nervous system

Not billable — use a more specific code

A17 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About A17

A17 is the ICD-10-CM diagnosis code for tuberculosis of nervous system. It belongs to block A15-A19 (tuberculosis) and chapter 1 (certain infectious and parasitic diseases). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: A17.0 (meningitis), A17.1 (tuberculoma), A17.8 (system) and A17.9 (unspecified).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under A17

Notes that apply from higher levels

Instructions written at a parent level also apply to A17.

Broader instructions also apply from A15-A19 Tuberculosis and Chapter 1: Certain infectious and parasitic diseases.

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about A17

Is A17 billable?: No. A17 is a header code. Report one of its more specific subcodes instead.