ICD-10 G80.9
Billable / Specific HCC v28: 74Cerebral palsy, unspecified
About ICD-10-CM G80.9
ICD-10-CM code G80.9 represents Cerebral palsy, unspecified. This is a billable/specific code in the Nervous System chapter (block G80). The 2026 edition of ICD-10-CM G80.9 became effective on October 1, 2025.
Coding Tips for G80.9
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
G80.9 is a CMS-HCC v28 risk-adjustment code (category 74). To count for the patient Risk Adjustment Factor (RAF), document the diagnosis with MEAT language each calendar year: Monitored, Evaluated, Assessed, Treated. A diagnosis on the problem list alone does not satisfy CMS RADV audit standards. Include the diagnosis in the assessment with current status and current treatment plan.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under G80.9. Per CMS ICD-10-CM Tabular 2026.
- Cerebral palsy NOS
Medicare Advantage HCC Impact
Capture this diagnosis annually for accurate risk adjustment. Missed HCC captures are the #1 revenue leak in Medicare Advantage risk programs.
Medicare LCD Coverage for G80.9
Local Coverage Determinations (LCDs) from CMS MACs that list G80.9 as a covered diagnosis.
Showing top 10 of 527 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing G80.9.
3 Cigna
5 Medicare
2 Aetna
CPT Codes Commonly Billed with G80.9
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 97112 Neuromuscular reeducation — hemiplegia, paraplegia, cerebral palsy, post-stroke, gait abnormality, ataxia, MS, Parkinson, concussion, hx TBI Physical Therapy
Convert G80.9 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| G80.9 | 3439 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To G80.9
Other codes in section G80-G83 (Cerebral palsy and other paralytic syndromes).
ICD-10 G80.9, Billing FAQ
Is ICD-10 code G80.9 billable? +
Yes, G80.9 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to G80.9? +
ICD-10 G80.9 includes: Cerebral palsy NOS.
Does G80.9 affect Medicare Advantage HCC risk adjustment? +
Yes. G80.9 maps to CMS-HCC v28 category 74. Capture this diagnosis annually for accurate Medicare Advantage risk score.
What CPT codes are commonly billed with G80.9? +
Procedures frequently paired with G80.9 include: 97112.
What ICD-9 codes does G80.9 map to? +
Per CMS GEMs, G80.9 maps to ICD-9 codes: 3439. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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