What is ICD-10 code G80.8?

G80.8 is the ICD-10-CM diagnosis code for Other cerebral palsy. Cerebral palsy that does not fit neatly into the standard categories or represents a combination of different types. It belongs to the ICD-10-CM chapter for diseases of the nervous system (g00-g99). G80.8 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. G80.8 is part of the FY2026 ICD-10-CM code set published by the CMS National Center for Health Statistics and used on Medicare, Medicaid, and commercial claims in the United States.

Yes. G80.8 is a billable ICD-10-CM code that can be reported on professional and institutional claims as a primary or secondary diagnosis when the provider documentation supports the specific condition described. Billable codes in ICD-10-CM are coded to the highest level of specificity available for the documented diagnosis. G80.8 is current for fiscal year 2026 and remains in the active CMS ICD-10-CM code set published by the National Center for Health Statistics.

What is the V28 vs V24 difference for G80.8?

CMS phased in the V28 risk adjustment model over payment years 2024 (33%), 2025 (67%), and 2026 (100%), replacing V24. V28 consolidates HCC categories, removes some lower-acuity conditions, and recalibrates RAF weights across the entire model. For G80.8, V28 maps to Cerebral Palsy, Except Quadriplegic at RAF 0.314 while V24 mapped to Cerebral Palsy at RAF 0.339. Both models can still appear in legacy data and in payer-specific lookback periods.

What should coders know when reporting G80.8?

Use this code only when the cerebral palsy type is mixed or does not clearly fit G80.0-G80.4 Document the specific characteristics and affected body areas to support medical necessity Because G80.8 maps to a payment HCC, the documentation must also satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) for the encounter to count toward the patient's risk adjustment score.

G80.8: Other cerebral palsy — ICD-10 | Cerebral Palsy, Except Quadriplegic, Cerebral Palsy

ICD-10-CM Code View

HCC Buddy Code Card

Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.

Code lookupG80.8Effective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Diseases of the nervous system (G00-G99) / Cerebral palsy and other paralytic syndromes (G80-G83)

G80.8

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Other cerebral palsy

Cerebral palsy that does not fit neatly into the standard categories or represents a combination of different types.

Buddy Insight

Other cerebral palsy captures mixed or atypical presentations that do not fit standard subtypes, representing complex neurological involvement with variable functional limitations.

CMS-HCC V28

Mapped

HCC 192

Cerebral Palsy, Except Quadri...

RAF 0.314

CMS-HCC V24

Mapped

HCC 74

Cerebral Palsy

RAF 0.339

ACA/HHS

Not risk-adjusted for this model/period.

RAF 0

ESRD/PACE

Mapped

HCC 74

Cerebral Palsy

RAF 0.0

RXHCC

Not risk-adjusted for this model/period.

RAF 0

Code Trumping

Basket needed

Compare selected patient codes to show trumped or trumps impact.

Code Book Path

Official

G80Cerebral palsy

G80.8Other cerebral palsy

Inclusion Terms

Official

Mixed cerebral palsy syndromes

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for G80.8 in this effective period.

Related Child Codes

Official

G80.0Spastic quadriplegic cerebral palsy

G80.1Spastic diplegic cerebral palsy

G80.2Spastic hemiplegic cerebral palsy

G80.3Athetoid cerebral palsy

G80.4Ataxic cerebral palsy

Includes

Official

ICD-10-CM does not list Includes notes for G80.8 in this effective period.

Excludes 1

Official

hereditary spastic paraplegia (G11.4)

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for G80.8 in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for G80.8 in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for G80.8 in this effective period.

Buddy Documentation Tip

HCC Buddy guidance

Statement that cerebral palsy type is mixed or does not fit standard categories (spastic, dyskinetic, ataxic)

Description of specific motor abnormalities present (combination of spasticity, dystonia, ataxia)

Affected body areas and extent of involvement

Functional status and mobility level

MEAT Support

HCC Buddy guidance

Statement that cerebral palsy type is mixed or does not fit standard categories (spastic, dyskinetic, ataxic)

Description of specific motor abnormalities present (combination of spasticity, dystonia, ataxia)

Affected body areas and extent of involvement

Functional status and mobility level

Audit Caution

HCC Buddy guidance

Using G80.8 as a default when the provider simply has not specified the type — that scenario requires G80.9

Not recognizing that 'mixed type' cerebral palsy should be coded as G80.8, not two separate cerebral palsy codes

Failing to query the provider when documentation suggests a specific subtype may be identifiable

Confusing mixed cerebral palsy with cerebral palsy that has multiple comorbid conditions

Common Mistakes

HCC Buddy guidance

G80.0-G80.4 Specific cerebral palsy types — use these when a single type is clearly documented

G80.9 Cerebral palsy, unspecified — use G80.8 when the type is known but mixed, use G80.9 only when type is truly unknown

G83.9 Paralytic syndrome, unspecified — cerebral palsy codes are more specific and should be preferred

Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.

Is G80.8 an HCC code?

Yes. G80.8 maps to Cerebral Palsy, Except Quadriplegic under the CMS-HCC V28 risk adjustment model (and Cerebral Palsy under V24).

HCC Category Mapping

V28HCC 192, Cerebral Palsy, Except Quadriplegic

0.314

V24HCC 74, Cerebral Palsy

0.339

ESRDHCC 74, Cerebral Palsy

0.000

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.

Work G80.8 in the Code Book — tabular path, V28 RAF, and MEAT checklist →

MEAT Criteria for G80.8

For G80.8to 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 G80.8 during that encounter, not just copy-forwarded from a problem list.

Coder workflow notes

Get the V28 RAF + MEAT cheat sheet

One printable page: confirm a code's V28 HCC status, its RAF weight, and the MEAT your note needs to make it stick. Free, no card.

Free PDF. No card. Unsubscribe anytime.

What This Code Means

G80.8 is the ICD-10-CM diagnosis code for other cerebral palsy. Cerebral palsy that does not fit neatly into the standard categories or represents a combination of different types. G80.8 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, G80.8 maps to Cerebral Palsy, Except Quadriplegic (HCC 192) with a community, non-dual, aged base RAF weight of 0.314. Under the older CMS-HCC V24 model, G80.8 maps to Cerebral Palsy (HCC 74) with a community, non-dual, aged base RAF weight of 0.339. 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.

Use this code only when the cerebral palsy type is mixed or does not clearly fit G80.0-G80.4. Because G80.8 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 G80.8 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•Use this code only when the cerebral palsy type is mixed or does not clearly fit G80.0-G80.4
•Document the specific characteristics and affected body areas to support medical necessity

Clinical Significance

Other cerebral palsy captures mixed or atypical presentations that do not fit standard subtypes, representing complex neurological involvement with variable functional limitations. These patients often have the most challenging clinical pictures, requiring individualized treatment approaches. Proper coding ensures adequate resource prediction for patients whose condition defies simple categorization.

Documentation Requirements

✓Statement that cerebral palsy type is mixed or does not fit standard categories (spastic, dyskinetic, ataxic)
✓Description of specific motor abnormalities present (combination of spasticity, dystonia, ataxia)
✓Affected body areas and extent of involvement
✓Functional status and mobility level
✓Current management plan and therapies
✓Confirmation the condition is actively monitored or treated

Commonly Confused Codes

•G80.0-G80.4 Specific cerebral palsy types: use these when a single type is clearly documented
•G80.9 Cerebral palsy, unspecified: use G80.8 when the type is known but mixed, use G80.9 only when type is truly unknown
•G83.9 Paralytic syndrome, unspecified: cerebral palsy codes are more specific and should be preferred