G80.4 Ataxic cerebral palsy

Billable ICD-10-CM code, FY2026.

Applies from G80 Cerebral palsy

Excludes1 (never code together)

• hereditary spastic paraplegia (G11.4)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 192 — Cerebral Palsy, Except Quadriplegic
• CMS-HCC V22: HCC 74 — Cerebral Palsy
• ESRD V24: HCC 74

MS-DRG index

Defines the logic of DRG(s) 091-093 in MDC 01.

Approximate ICD-9-CM (GEMs)

• 343.8 Other specified infantile cerebral palsy (approximate)

Code annotations containing back-references to G80.4

Back-references to G80

• Type 2 Excludes: G11 Hereditary ataxia ("cerebral palsy (G80.-)")
• Type 1 Excludes: G81 Hemiplegia and hemiparesis ("congenital cerebral palsy (G80.-)")
• Type 1 Excludes: G82 Paraplegia (paraparesis) and quadriplegia (quadriparesis) ("congenital cerebral palsy (G80.-)")
• Use Additional: Q87.88 CTNNB1 syndrome ("cerebral palsy (G80.-)")

Diagnosis Index entries for G80.4

• Diataxia, cerebral
• Palsy › cerebral (congenital) › ataxic

Nearby codes

• G80 Cerebral palsy
• G80.0 Spastic quadriplegic cerebral palsy
• G80.1 Spastic diplegic cerebral palsy
• G80.2 Spastic hemiplegic cerebral palsy
• G80.3 Athetoid cerebral palsy
• G80.4 Ataxic cerebral palsy (this code)
• G80.8 Other cerebral palsy
• G80.9 Cerebral palsy, unspecified