FY2027 ICD-10-CM reference
G11: Hereditary ataxia
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Hereditary ataxia. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Nonbillable heading. Verified against the official FY2027 order file.
CMS-HCC V28
Not applicable to this nonbillable heading
CMS-HCC V24
Not applicable to this nonbillable heading
ESRD
Not applicable to this nonbillable heading
PACE
Not applicable to this nonbillable heading
RxHCC
Not applicable to this nonbillable heading
HHS-HCC
Not applicable to this nonbillable heading
More specific FY2027 codes
- G11.0: Congenital nonprogressive ataxiaBillable code
- G11.1: Early-onset cerebellar ataxiaNonbillable heading
- G11.2: Late-onset cerebellar ataxiaBillable code
- G11.3: Cerebellar ataxia with defective DNA repairBillable code
- G11.4: Hereditary spastic paraplegiaBillable code
- G11.5: Hypomyelination - hypogonadotropic hypogonadism - hypodontiaBillable code
- G11.6: Leukodystrophy with vanishing white matter diseaseBillable code
- G11.8: Other hereditary ataxiasBillable code
- G11.9: Hereditary ataxia, unspecifiedBillable code
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Excludes2
certain conditions originating in the perinatal period (P04-P96)
Source: G00-G99 (chapter, inherited).
Excludes2
certain infectious and parasitic diseases (A00-B99)
Source: G00-G99 (chapter, inherited).
Excludes2
complications of pregnancy, childbirth and the puerperium (O00-O9A)
Source: G00-G99 (chapter, inherited).
Excludes2
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
Source: G00-G99 (chapter, inherited).
Excludes2
endocrine, nutritional and metabolic diseases (E00-E88)
Source: G00-G99 (chapter, inherited).
Excludes2
injury, poisoning and certain other consequences of external causes (S00-T88)
Source: G00-G99 (chapter, inherited).
Excludes2
neoplasms (C00-D49)
Source: G00-G99 (chapter, inherited).
Excludes2
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: G00-G99 (chapter, inherited).
Excludes2
cerebral palsy (G80.-)
Source: G11 (category, direct).
Excludes2
hereditary and idiopathic neuropathy (G60.-)
Source: G11 (category, direct).
Excludes2
metabolic disorders (E70-E88)
Source: G11 (category, direct).
Compare the FY2027 additions, removals and billable-status changes
What does G11 mean in FY2027?
The official ICD-10-CM descriptor is Hereditary ataxia. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is G11 billable in FY2027?
The FY2027 order file marks G11 as a nonbillable heading. Select a complete billable child code.
Does G11 map to an HCC?
Risk-model mapping is not applicable to this nonbillable heading. Check a complete billable child code.
Source: CMS FY2027 ICD-10-CM order file. Payment model: CMS CY 2027 Rate Announcement. Read the FY2027 Official Guidelines.
Review the FY2026 April edition