Q07.9 Congenital malformation of nervous system, unspecified
Billable ICD-10-CM code, FY2026. Exempt from present-on-admission (POA) reporting.
Applicable to
- Congenital anomaly NOS of nervous system
- Congenital deformity NOS of nervous system
- Congenital disease or lesion NOS of nervous system
Applies from Q07 Other congenital malformations of nervous system
Excludes2 (not included here)
- congenital central alveolar hypoventilation syndrome (G47.35)
- familial dysautonomia [Riley-Day] (G90.1)
- neurofibromatosis (nonmalignant) (Q85.0-)
Risk adjustment (HCC)
- CMS-HCC V28: HCC 182 — Spinal Cord Disorders/Injuries
- CMS-HCC V22: HCC 72 — Spinal Cord Disorders/Injuries
- RxHCC V08: HCC 155 — Spinal Cord Disorders
- ESRD V24: HCC 72
MS-DRG index
Defines the logic of DRG(s) 091-093 in MDC 01.
Approximate ICD-9-CM (GEMs)
742.9 Unspecified congenital anomaly of brain, spinal cord, and nervous system (approximate)
Code annotations containing back-references to Q07.9
Back-references to Q07
- Type 1 Excludes:
G91 Hydrocephalus ("Arnold-Chiari syndrome with hydrocephalus (Q07.-)")
Diagnosis Index entries for Q07.9
- Abnormal, abnormality, abnormalities › development, developmental › central nervous system
- Anomaly, anomalous (congenital) (unspecified type) › gyri
- Anomaly, anomalous (congenital) (unspecified type) › meningeal bands or folds
- Anomaly, anomalous (congenital) (unspecified type) › meninges
- Anomaly, anomalous (congenital) (unspecified type) › nerve
- Anomaly, anomalous (congenital) (unspecified type) › nervous system (central)
- Deformity › meninges or membrane (congenital)
- Deformity › nervous system (congenital)
- Deformity › spinal › nerve root (congenital)
- Disease, diseased › nervous system › congenital
- Dysplasia › brain
- Encephalopathy (acute) › congenital
- Lesion (s) (nontraumatic) › nervous system, congenital
- Maldevelopment › brain
- Malformation (congenital) › dura
- Malformation (congenital) › meninges or membrane (congenital)
- Malformation (congenital) › nervous system (central)
- Malformation (congenital) › sense organs NEC
Nearby codes
Q07.00 Arnold-Chiari syndrome without spina bifida or hydrocephalusQ07.01 Arnold-Chiari syndrome with spina bifidaQ07.02 Arnold-Chiari syndrome with hydrocephalusQ07.03 Arnold-Chiari syndrome with spina bifida and hydrocephalusQ07.8 Other specified congenital malformations of nervous systemQ07.9 Congenital malformation of nervous system, unspecified (this code)