G80.2
BillableSpastic hemiplegic cerebral palsy
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is G80.2 an HCC code?
Yes. G80.2 maps to Cerebral Palsy, Except Quadriplegic under the CMS-HCC V28 risk adjustment model (and Cerebral Palsy under V24).
HCC Category Mapping
RAF weights shown are the community, non-dual, aged base weights from the CMS risk adjustment model file. Actual per-patient RAF contribution depends on member segment, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains in use during the transition and for historical data.
MEAT Criteria for G80.2
For G80.2 to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically — it has to be re-documented and supported each calendar year.
- MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
- EEvaluate: test results, medication response, or physical findings reviewed by the provider
- AAssess: explicit mention in the assessment or plan with acknowledgment of status
- TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis
Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed G80.2 during that encounter — not just copy-forwarded from a problem list.
What This Code Means
G80.2 is the ICD-10-CM diagnosis code for spastic hemiplegic cerebral palsy. A type of cerebral palsy affecting one side of the body with stiff, rigid muscle tone, typically resulting from brain damage on the opposite side. G80.2 sits in the ICD-10-CM chapter for diseases of the nervous system (g00-g99), within the section covering cerebral palsy and other paralytic syndromes (g80-g83).
Under the CMS-HCC V28 risk adjustment model, G80.2 maps to Cerebral Palsy, Except Quadriplegic (HCC 192) with a community, non-dual, aged base RAF weight of 0.368. Under the older CMS-HCC V24 model, G80.2 maps to Cerebral Palsy (HCC 74) with a community, non-dual, aged base RAF weight of 0.000. V28 is the CMS-HCC risk adjustment model that reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition.
Specify which side is affected (right or left) in clinical documentation for clarity. Because G80.2 maps to a payment HCC, the provider's documentation must satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) for the encounter to count toward the patient's Medicare Advantage risk adjustment score. When documentation is ambiguous, coders should issue a provider query rather than assume the highest-specificity variant.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for G80.2 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Specify which side is affected (right or left) in clinical documentation for clarity
- •Often associated with better functional outcomes compared to other cerebral palsy types
Clinical Significance
Spastic hemiplegic cerebral palsy affects one side of the body, typically with the upper extremity more involved than the lower. It often results from a unilateral brain lesion such as perinatal stroke. While generally associated with better functional outcomes than quadriplegic or diplegic types, these patients still require lifelong rehabilitation and may have associated cognitive or sensory deficits.
Documentation Requirements
- ✓Diagnosis of cerebral palsy with spastic hemiplegic type specified
- ✓Side of involvement documented: right or left hemiplegia
- ✓Underlying etiology when known: perinatal stroke, brain malformation
- ✓Upper versus lower extremity involvement comparison
- ✓Associated conditions: seizures, learning difficulties, visual field deficits
- ✓Functional status and current rehabilitation services