FY2026
Effective from
- Code-level rules changed
Hypomyelination with atrophy of the basal ganglia and cerebellum
Billable diagnosis code
CDC/NCHS · FY2026multi-system degeneration of the autonomic nervous system (G90.3)
Coverage depends on the payer, service and applicable policy. A billable code does not guarantee payment.
For US diagnosis claims covered by HIPAA, ICD-10-CM is required from October 1, 2015.
Use the service date for outpatient/professional claims and the discharge date for hospital inpatient claims. Earlier encounters use ICD-9-CM; each individual code must also be valid for the applicable date.
Official coding guidelines → · CMS ↗Grouping depends on the complete encounter and CMS grouper logic.
2026-04-01 – 2026-09-30
CMS · MS-DRG 43.1First observed · 2023-10-01
Latest recorded change · FY2026
Effective from
Hypomyelination with atrophy of the basal ganglia and cerebellum
Billable diagnosis code
CDC/NCHS · FY2026| All editions | Effective from | Code history |
|---|---|---|
| FY2024 | 2023-10-01 | Added |
| FY2024 · 04-01 | 2024-04-01 | No tabular change |
| FY2025 | 2024-10-01 | No tabular change |
| FY2025 · 04-01 | 2025-04-01 | No tabular change |
| FY2026 | 2025-10-01 | Code-level rules changed |
| FY2026 · April | 2026-04-01 | No tabular change |
| FY2027 | 2026-10-01 | No tabular change |
multi-system degeneration of the autonomic nervous system (G90.3)
Historical assignments from the CDC conversion table support data retrieval. They do not authorize substituting a previous code for the current code.
Previous assignment: G23.8
Other entries in the same category; these are not automatic substitutes.
| Code | Description | Category · further specificity required |
|---|---|---|
| G23.0 | Hallervorden-Spatz disease | Billable / specific |
| G23.1 | Progressive supranuclear ophthalmoplegia [Steele-Richardson-Olszewski] | Billable / specific |
| G23.2 | Striatonigral degeneration | Billable / specific |
| G23.8 | Other specified degenerative diseases of basal ganglia | Billable / specific |
| G23.9 | Degenerative disease of basal ganglia, unspecified | Billable / specific |
Official titles and instructions are preserved in their source language. Official sources ↗