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Q02 ICD-10-CM Code: Microcephaly

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Official description

Q02

Microcephaly

ICD-10-CM diagnosis code · United States clinical modification

Where Q02 sits

  1. 1

    Chapter 17

    Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)

  2. 2

    Section

    Congenital malformations of the nervous system (Q00-Q07)

  3. 3

    Category Q02

    Microcephaly

  4. 4

    Code Q02

    Microcephaly

Notes for this code

Inclusion terms

No inclusion terms are listed for Q02.

Code first

  • , if applicable, congenital Zika virus disease

Use additional code

No “use additional code” instruction is listed for Q02.

Excludes1

Conditions that should not be reported together with this code.

  • Meckel-Gruber syndrome (Q61.9)

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for Q02.

Source and release

Data release
U.S. ICD-10-CM · FY 2027
Effective date
Oct 1, 2026

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Frequently asked questions

What does ICD-10-CM code Q02 mean?

Q02 is the FY 2027 U.S. ICD-10-CM code for “Microcephaly.”

Is Q02 a billable or specific ICD-10-CM code?

Yes. In the FY 2027 reference data used on this page, Q02 has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.

Where is Q02 located in ICD-10-CM?

Q02 is listed in Chapter 17, Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1), within Congenital malformations of the nervous system (Q00-Q07) (Q00–Q07), under category Q02, Microcephaly.

What coding notes are listed for Q02?

No inclusion terms are listed for Q02 in this reference record. Code-first instructions: , if applicable, congenital Zika virus disease. Excludes1 notes: Meckel-Gruber syndrome (Q61.9). No Excludes2 note is listed.