ICD-10-CM 2027 diagnosis code

QA0Neurodevelopmental disorders related to specific genetic pathogenic variants

Not billable — use a more specific code

QA0 is a header code, so it can't be reported by itself. Choose one of the 2 more specific codes beneath it.Short description: Neurodev disord related to specific genetic patho variants

Code last changed in FY2026 (effective October 1, 2025). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About QA0

QA0 is the ICD-10-CM diagnosis code for neurodevelopmental disorders related to specific genetic pathogenic variants. It belongs to block QA0-QA1 (genetic disorders, not elsewhere classified) and chapter 17 (congenital malformations, deformations, chromosomal abnormalities, and genetic disorders). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: QA0.0 (genes) and QA0.8 (genes).

It was added in FY2026, effective October 1, 2025.

Specific codes under QA0

Coding notes

Code alsoTwo codes may be needed; sequencing depends on circumstances

, if applicable, any associated conditions, such as:
attention-deficit hyperactivity disorders (F90.-)
autism spectrum disorder (F84.0)
developmental and epileptic encephalopathy (G93.45)
epilepsy, by specific type (G40.-)
intellectual disabilities (F70-F79)
pervasive developmental disorders (F84.-)

Notes that apply from higher levels

Instructions written at a parent level also apply to QA0.

Broader instructions also apply from Chapter 17: Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders.

Code history

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

FY2026 (effective 10/1/2025): Added
No changes since FY2026.

Common questions about QA0

Is QA0 billable?: No. QA0 is a header code. Report one of its more specific subcodes instead.