G11.8
BillableOther hereditary ataxias
HCC Category Mapping
V28HCC 200 — Cerebellar Ataxia and Other Degenerative Diseases of Nervous System
0.262V24HCC 72 — Spinal Cord Disorders/Injuries
0.464ESRDHCC 72 — Spinal Cord Disorders/Injuries
0.000What This Code Means
A group of inherited neurological disorders that affect coordination and balance, not classified as other specific types of hereditary ataxia.
Coding Tips
- •Use this code when documentation specifies a hereditary ataxia that doesn't fit other G11 subcategories; request clarification on the specific type if possible
- •Review family history documentation to confirm hereditary nature before coding
Clinical Significance
Other hereditary ataxias serves as the specified 'other' code for inherited coordination disorders that have a confirmed hereditary basis but do not fit into more specific G11 subcategories. This captures rare ataxia variants that still carry significant neurological morbidity and require specialist management.
Documentation Requirements
- ✓Specific hereditary ataxia diagnosis named in documentation
- ✓Family history documenting inherited pattern
- ✓Genetic testing results or clinical criteria supporting hereditary etiology
- ✓Progressive cerebellar signs on neurological examination
- ✓Confirmation that the condition does not fit G11.0-G11.6, G11.11, or G11.19 categories
- ✓Current functional status and treatment plan
Commonly Confused Codes
G11.9 — Hereditary ataxia, unspecified: use only when the specific type is truly unknown; G11.8 is for known types without their own codeG11.2 — Late-onset cerebellar ataxia: use for late-onset forms rather than the 'other' codeR27.0 — Ataxia, unspecified: symptom code inappropriate when hereditary ataxia diagnosis existsG11.19 — Other early-onset cerebellar ataxia: use for early-onset subtypes specifically