Q06.4 Hydromyelia

Billable ICD-10-CM code, FY2026. Exempt from present-on-admission (POA) reporting.

Applicable to

• Hydrorachis

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)

• 742.53 Hydromyelia

Diagnosis Index entries for Q06.4

• Hydromyelia
• Hydrorachis

Nearby codes

• Q06 Other congenital malformations of spinal cord
• Q06.0 Amyelia
• Q06.1 Hypoplasia and dysplasia of spinal cord
• Q06.2 Diastematomyelia
• Q06.3 Other congenital cauda equina malformations
• Q06.4 Hydromyelia (this code)
• Q06.8 Other specified congenital malformations of spinal cord
• Q06.9 Congenital malformation of spinal cord, unspecified