2027 ICD-10-CM Diagnosis Code G80.3Athetoid cerebral palsy
ICD-10-CM Codes›G00–G99›G80-G83›G80
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Risk Adjusts — HCC 192
- Chronic Condition
G80.3 is a billable ICD-10-CM diagnosis code for athetoid cerebral palsy. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 56 through 57. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 33 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cerebral palsy.
For Medicare Advantage risk adjustment, G80.3 maps to CMS-HCC Category 192 (Cerebral Palsy, Except Quadriplegic) under the V28 model, adding a risk factor of about 0.314 for a community, non-dual, aged beneficiary in payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
G80.3 maps to a payment category in the CMS-HCC model used to risk-adjust Medicare Advantage payments. Weights are the published community factors for payment year 2027.
Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Athetoid cerebral palsy
- Brachycephaly
- Chorea-athetoid cerebral palsy
- Choreic cerebral palsy
- Choreoathetosis
- Congenital athetosis
- Congenital sequelae of disorders
- Double athetosis
- Dyskinetic cerebral palsy
- Dystonic cerebral palsy
- Dystonic/rigid cerebral palsy
- Non-spastic cerebral palsy
- Severe microbrachycephaly, intellectual disability, athetoid cerebral palsy syndrome
- Status marmoratus
- Structural abnormality of thalamus
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to G80.3: its own notes plus those printed at G80 and Chapter 6. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Double athetosis (syndrome)
- Dyskinetic cerebral palsy
- Dystonic cerebral palsy
- Vogt disease
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name G80.3, its category, or a range that includes it.
Excludes1 2
These codes carry an Excludes1 note naming G80.3: they are not reported together with it, unless the two conditions are unrelated.
Excludes2 2
These codes carry an Excludes2 note naming G80.3: its condition is not part of those codes, and both may be reported when the patient has both.
Use Additional Code 1
These codes say to use an additional code from the note, and G80.3 is one of the codes named.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
bilateral (congenital) G80.3
double (congenital) G80.3
Palsy See Also: Paralysis; G83.9
athetoid G80.3
choreathetoid G80.3
dyskinetic G80.3
athetoid G80.3
choreathetoid G80.3
distonic G80.3
dystonic G80.3
Status (post) See Also: Presence (of);
marmoratus G80.3
Syndrome See Also: Disease;
double athetosis G80.3
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Athetoid Cerebral Palsy
a subtype of cerebral palsy characterized by involuntary, purposeless writhing movements which affect the hands, feet, arms, and legs; the face and tongue may be affected as well, leading to involuntary grimacing, drooling, dysarthria and difficulty eating.Cerebral Palsy
a heterogeneous group of nonprogressive motor disorders caused by chronic brain injuries that originate in the prenatal period, perinatal period, or first few years of life. the four major subtypes are spastic, athetoid, ataxic, and mixed cerebral palsy, with spastic forms being the most common. the motor disorder may range from difficulties with fine motor control to severe spasticity (see muscle spasticity) in all limbs. spastic diplegia (little disease) is the most common subtype, and is characterized by spasticity that is more prominent in the legs than in the arms. pathologically, this condition may be associated with leukomalacia, periventricular. (from dev med child neurol 1998 aug;40(8):520-7)
Patient EducationClinical
Cerebral Palsy
Cerebral palsy (CP) is a group of neurologic disorders that cause problems with movement, balance, and posture. The first part of the name, cerebral, means having to do with the brain. The second part, palsy, means weakness or problems with using the muscles.
The full article covers:
- What is cerebral palsy (CP)?
- What are the types of cerebral palsy (CP)?
- What causes cerebral palsy (CP)?
- Who is more likely to develop cerebral palsy (CP)?
- What are the signs of cerebral palsy (CP)?
- How is cerebral palsy (CP) diagnosed?
- What are the treatments for cerebral palsy (CP)?
- Can cerebral palsy (CP) be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert G80.3 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About G80.3Overview
What is the ICD-10 code for athetoid cerebral palsy?
The ICD-10-CM code for athetoid cerebral palsy is G80.3 (sometimes written as G803). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is G80.3 (Cerebral palsy) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report athetoid cerebral palsy on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does G80.3 group to?
When athetoid cerebral palsy is the principal diagnosis on an inpatient stay, it groups to MS-DRG 57, 56, with relative weights from 1.2835 to 2.2649 depending on complications. Higher weights mean higher Medicare reimbursement.
Is G80.3 a CC or MCC?
CMS lists G80.3 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 33 closely related codes in its exclusion list.
Can G80.3 be reported with G11.4?
Not as a rule. The Excludes1 note at G80, which applies to G80.3, lists "hereditary spastic paraplegia (G11.4)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What HCC is G80.3?
G80.3 (athetoid cerebral palsy) maps to CMS-HCC Category 192 (Cerebral Palsy, Except Quadriplegic), commonly written as HCC 192, in the CMS-HCC V28 model used for Medicare Advantage risk adjustment in payment year 2027. It mapped to HCC 74 under the retired V24 model. It also maps in the PACE (CMS-HCC V22), ESRD (V21), and ESRD (V24) models. It does not map to any RxHCC in the Part D prescription drug model.
Does G80.3 risk-adjust for Medicare Advantage payment?
Yes. When documented and reported on a Medicare Advantage encounter, G80.3 adds a risk adjustment factor of about 0.314 to the beneficiary's RAF score for a community, non-dual, aged enrollee (published V28 weights range from 0.000 to 0.314 depending on the payment segment). A more severe related category (HCC 191) supersedes it when both are reported. See the full factor table on the HCC 192 category page.
