ICD-10-CM 2027 diagnosis code

A39Meningococcal infection

Not billable — use a more specific code

A39 is a header code, so it can't be reported by itself. Choose one of the 8 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 A39

A39 is the ICD-10-CM diagnosis code for meningococcal infection. It belongs to block A30-A49 (other bacterial diseases) and chapter 1 (certain infectious and parasitic diseases). It is a header code, so it can't be reported by itself; one of its 8 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: A39.0 (meningitis), A39.1 (syndrome), A39.2 (meningococcemia), A39.3 (meningococcemia), A39.4 (unspecified), A39.5 (disease), A39.8 (infections) and A39.9 (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 A39

Notes that apply from higher levels

Instructions written at a parent level also apply to A39.

Broader instructions also apply from 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 A39

Is A39 billable?: No. A39 is a header code. Report one of its more specific subcodes instead.