Q02

Billable

Microcephaly

HCC Category Mapping

V28HCC 182 — Spinal Cord Disorders/Injuries

0.282

V24HCC 72 — Spinal Cord Disorders/Injuries

0.464

ESRDHCC 72 — Spinal Cord Disorders/Injuries

0.000

RxHCCHCC 155 — Myelitis and Encephalomyelitis

0.000

What This Code Means

A birth defect where the baby's head and brain are smaller than normal, which can affect development and function.

Coding Tips

•Document the severity (mild, moderate, severe) if specified in clinical notes
•Note any associated conditions such as intellectual disability or seizures

Clinical Significance

Microcephaly represents significantly reduced head and brain size at birth, indicating impaired brain development with high risk for intellectual disability, developmental delays, and neurological complications. This diagnosis requires comprehensive evaluation for underlying causes and early intervention services.

Documentation Requirements

✓Head circumference measurements below 2-3 standard deviations for gestational age
✓Documentation of small brain size on neuroimaging
✓Associated dysmorphic features if present
✓Maternal history including infections, exposures, genetic factors
✓Neurological examination findings
✓Genetic testing results if performed
✓Developmental assessments and early intervention referrals
✓Ophthalmologic and hearing evaluations

Includes

hydromicrocephaly
micrencephalon

Excludes 1 — Do NOT code together

Meckel-Gruber syndrome (Q61.9)

Code First

, if applicable, congenital Zika virus disease

Commonly Confused Codes

Q00.0 — Anencephaly, absent brain vs small brain Q04.3 — Other brain reduction deformities, specific vs general small brain P02.7 — Fetus affected by chorioamnionitis, potential cause vs condition itself F79 — Unspecified intellectual disabilities, developmental outcome vs structural cause

Code Hierarchy

└Q02Microcephaly

Q02