1. G23 Other degenerative diseases of basal ganglia

    Excludes2

    • multi-system degeneration of the autonomic nervous system (G90.3)
    1. G23.0 Hallervorden-Spatz disease

      Inclusion term(s):

      • Pigmentary pallidal degeneration
    2. G23.1 Progressive supranuclear ophthalmoplegia [Steele-Richardson-Olszewski]

      Inclusion term(s):

      • Progressive supranuclear palsy
    3. G23.2 Striatonigral degeneration

    4. G23.3 Hypomyelination with atrophy of the basal ganglia and cerebellum

      Inclusion term(s):

      • H-ABC
    5. G23.8 Other specified degenerative diseases of basal ganglia

      Inclusion term(s):

      • Calcification of basal ganglia
    6. G23.9 Degenerative disease of basal ganglia, unspecified

Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.