G23.8 Other specified degenerative diseases of basal ganglia
The ICD-10-CM code for Other specified degenerative diseases of basal ganglia is G23.8 (FY2026). It is a billable, claim-ready diagnosis code.
Classification
- Section
- G20-G26: Extrapyramidal and movement disorders (G20-G26)
- Category G23
- 7 codes (6 billable)
- FY2026 Status
- Stable since FY2024
Also Known As
ICD-10-CM Alphabetic Index entries that lead to G23.8:
- Fahr disease (of brain)
- Déjérine-Thomas atrophy
- Degeneration, degenerative › olivopontocerebellar (hereditary) (familial)
- Atrophy, atrophic (of) › Déjérine-Thomas
- Calcification › basal ganglia
- Atrophy, atrophic (of) › olivopontocerebellar
- Disease, diseased › Fahr (of brain)
- Degeneration, degenerative › basal nuclei or ganglia › specified NEC
Inclusion Terms
- Calcification of basal ganglia
U.S. Hospital Utilization
- An estimated 1,200 U.S. inpatient stays in 2023 included G23.8 among the documented diagnoses.
- 100 stays listed it as the principal diagnosis.
Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.
Official Coding Guidelines
Dominant/nondominant side (TOC entry)a. Dominant/nondominant side ................................................................................................. 45
Pain - Category G89 (TOC entry)b. Pain - Category G89.............................................................................................................. 45
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026