Q04.3

Other reduction deformities of brain

Billable FY2026 2025-10-01 → 2026-09-30

Exclusions 3 never code together

Q04code

Excludes1

Excludes1

Excludes1 — never code together. The excluded condition and this one are mutually exclusive.

Instructional notes 9

Inclusion terms

Index entries leading here 11

Absence (of) (organ or part) (complete or partial)
- brain Q00.0
  - part of Q04.3
- cerebellum (vermis) Q04.3
Agenesis
- brain Q00.0
  - part of Q04.3
- cerebellum Q04.3
- vermis of cerebellum Q04.3
Agyria Q04.3
Aplasia — see also Agenesis
- brain Q00.0
  - part of Q04.3
- cerebellum Q04.3
Deformity Q89.9
- reduction (extremity) (limb) , congenital Q73.8
  - brain Q04.3
- brain (congenital) Q04.9
  - reduction Q04.3
Hypoplasia, hypoplastic
- brain Q02
  - gyri Q04.3
  - part of Q04.3
- cerebellum Q04.3
Nondevelopment
- brain Q02
  - part of Q04.3
Hydrancephaly, hydranencephaly Q04.3
Lissencephalia, lissencephaly Q04.3
Microgyria (congenital) Q04.3
Pachygyria Q04.3

Alongside this code 8 same parent — Q04

Additional references

AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

CMS22HCC72 CMS28HCC182 ESRD21HCC72 ESRD24HCC72 RX08HCC155

Presence is a property of the code. Untick a model to hide it everywhere.

Present FY2024–FY2027.