Hereditary ataxia
In Systemic atrophies primarily affecting the central nervous system (G10-G14), chapter 6: Diseases of the Nervous System
11 billable codes under G11: all are a CC; all map to HCC 200 (Friedreich and Other Hereditary Ataxias; Huntington Disease).A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment. An HCC counts toward a Medicare Advantage patient's risk score.
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Instructional notes
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers default dominant or nondominant side for hemiplegia and monoplegia, and use and sequencing of G89 pain codes, including postoperative, chronic, and neoplasm-related pain.
- Dominant/nondominant side (page 45)
- Pain - Category G89 (page 45)
All codes under G11
G11 can't be used on a claim. Pick a billable code below; grey headings group them.
- G11.0Congenital nonprogressive ataxia
- G11.1Early-onset cerebellar ataxia
- G11.10Early-onset cerebellar ataxia, unspecified
- G11.11Friedreich ataxia
- G11.19Other early-onset cerebellar ataxia
- G11.2Late-onset cerebellar ataxia
- G11.3Cerebellar ataxia with defective DNA repair
- G11.4Hereditary spastic paraplegia
- G11.5Hypomyelination - hypogonadotropic hypogonadism - hypodontia
- G11.6Leukodystrophy with vanishing white matter disease
- G11.8Other hereditary ataxias
- G11.9Hereditary ataxia, unspecified
G11 MS-DRGs
As the principal diagnosis, all 11 billable codes under G11 group to MS-DRG 058, 059, or 060 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
Other codes that refer to G11
Notes on these codes point to G11.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Cerebellar Disorders
When you play the piano or hit a tennis ball you are activating the cerebellum. The cerebellum is the area of the brain that controls coordination and balance. Problems with the cerebellum include:
Read more about cerebellar disorders on MedlinePlusMovement Disorders
Movement disorders are neurologic conditions that cause problems with movement, such as: There are many different movement disorders. Some of the more common types include:
Read more about movement disorders on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.