Q02 ICD-10-CA code: Microcephaly
Q02 is the ICD-10-CA code for “Microcephaly” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
Q02Microcephaly
ICD-10-CA · Canada
Index terms
Entries in CIHI’s alphabetical index that lead to Q02. Searching the index by the condition the note names is how coders reach this code.
- Micrencephalon
- Hydromicrocephaly
- Nondevelopment, brain
- Hypoplasia, hypoplastic, brain
- Hypoplasia, hypoplastic, cephalic
- Agenesis, skull (bone), with, microcephaly
- Microcephalus, microcephalic, microcephaly
- Undeveloped, undevelopment, brain (congenital)
- Undeveloped, undevelopment, cerebral (congenital)
- Hypoplasia, hypoplastic, skull (bone), with, microcephaly
- Imperfect, closure (congenital), skull, with, microcephaly
- Deformity, skull (acquired), congenital, with, microcephaly
- Distortion (congenital), skull bone(s) NEC, with, microcephaly
- Absence (organ or part) (complete or partial), skull bone, with, microcephaly
- Anomaly, anomalous (congenital) (unspecified type), skull, with, microcephaly
- Anomaly, anomalous (congenital) (unspecified type), bone NEC, skull, with, microcephaly
Notes for Q02
As CIHI prints them, with any note Q02 takes from the headings above it.
Includes
- HydromicrocephalyMicrencephalon
Excludes
Conditions classified elsewhere.
- Meckel-Gruber syndrome (Q61.9)
- Inborn errors of metabolism (E70-E90)From Chapter 17: Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
Where Q02 sits
- 1ChapterChapter 17: Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- 2Block Q00-Q07Congenital malformations of the nervous system
- 3Valid code Q02Microcephaly
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does ICD-10-CA code Q02 mean?
Q02 is the ICD-10-CA code for “Microcephaly” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is Q02 in ICD-10-CA?
Q02 sits under Q00-Q07 Congenital malformations of the nervous system, within Chapter 17: Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99).
What coding notes apply to Q02?
ICD-10-CA lists Includes, Excludes notes for Q02, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.