Q00.0
Anencephaly
Risk-adjusting (HCC)Billable code
HCC risk adjustment mapping
CMS-HCC V28
HCC182
Spinal Cord Disorders/Injuries
CMS-HCC ESRD V24
HCC72
Spinal Cord Disorders/Injuries
RxHCC V08
RXHCC155
Spinal Cord Disorders
Coding notes
Excludes 1 never coded together · Excludes 2 may co-exist
This code · Q00.0
Synonyms
Acephaly Acrania Amyelencephaly Hemianencephaly Hemicephaly
Inherited from chapter 17Congenital malformations, deformations and chromosomal abnormalities
Excludes 2
inborn errors of metabolism (E70-E88)
Official Guidelines for Q00.0
FY 2026 ›Sections that reference Q00.0
Sections whose FY 2026 text names Q00.0, its Q00 category, or a range containing it — the chapter guidance above is the authoritative source.
Find Q00.0 in the alphabetic index
22 index paths lead to this code
- Acephalia, acephalism, acephalus, acephaly
- Acrania
- Amyelencephalus, amyelencephaly
- Anencephalus, anencephaly
- Hemianencephaly
- Hemicephalus, hemicephaly
- Absence › brain
- Agenesis › brain
- Anomaly, anomalous › hemianencephaly
- Anomaly, anomalous › hemicephaly
- Anomaly, anomalous › hemicrania
- Aplasia › brain
- Hemicrania › congenital malformation
- Monster, monstrosity › acephalic
- Absence › skull bone › with › anencephaly
- Agenesis › skull › with › anencephaly
- Anomaly, anomalous › skull › with › anencephaly
- Distortion › skull bone NEC › with › anencephalus
- Hypoplasia, hypoplastic › skull › with › anencephaly
- Anomaly, anomalous › bone › skull › with › anencephaly
- Deformity › skull › congenital › with › anencephaly
- Imperfect › closure › skull › with › anencephaly