HCC 199 (V28)
Parkinson and Other Degenerative Disease of Basal Ganglia
16 ICD-10-CM codes map to this category in the CMS-HCC V28 risk adjustment model for payment year 2027. All 115 HCCs
| G20.A1 | Parkinson's disease without dyskinesia, without mention of fluctuations |
| G20.A2 | Parkinson's disease without dyskinesia, with fluctuations |
| G20.B1 | Parkinson's disease with dyskinesia, without mention of fluctuations |
| G20.B2 | Parkinson's disease with dyskinesia, with fluctuations |
| G20.C | Parkinsonism, unspecified |
| G21.3 | Postencephalitic parkinsonism |
| G21.4 | Vascular parkinsonism |
| G21.8 | Other secondary parkinsonism |
| G21.9 | Secondary parkinsonism, unspecified |
| G23.0 | Hallervorden-Spatz disease |
| G23.1 | Progressive supranuclear ophthalmoplegia [Steele-Richardson-Olszewski] |
| G23.2 | Striatonigral degeneration |
| G23.3 | Hypomyelination with atrophy of the basal ganglia and cerebellum |
| G23.8 | Other specified degenerative diseases of basal ganglia |
| G23.9 | Degenerative disease of basal ganglia, unspecified |
| G90.3 | Multi-system degeneration of the autonomic nervous system |