All ICD10 Codes

G23

Non-Billable
ChapterG00–G99
Rankcategory
Official Description

Other degenerative diseases of basal ganglia

Use a more specific code (6 billable)
G23.0Hallervorden-Spatz diseaseG23.1Progressive supranuclear ophthalmoplegia [Steele-Richardson-Olszewski]G23.2Striatonigral degenerationG23.3Hypomyelination with atrophy of the basal ganglia and cerebellumG23.8Other specified degenerative diseases of basal gangliaG23.9Degenerative disease of basal ganglia, unspecified
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 6: Diseases of the Nervous System (G00-G99).

CH6 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Instructional Notes

Excludes2(Not included here. Code separately if applicable.)
  • multi-system degeneration of the autonomic nervous system (G90.3)

Clinical Hierarchy

BillableHas subcodes
CH6Diseases of the nervous system (G00-G99)
G20-G26Extrapyramidal and movement disorders (G20-G26)
G23Other degenerative diseases of basal gangliaNot billable
G23.0Hallervorden-Spatz diseaseBillable
G23.1Progressive supranuclear ophthalmoplegia [Steele-Richardson-Olszewski]Billable
G23.2Striatonigral degenerationBillable
G23.3Hypomyelination with atrophy of the basal ganglia and cerebellumBillable
G23.8Other specified degenerative diseases of basal gangliaBillable
G23.9Degenerative disease of basal ganglia, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to G23:

chapterCH6
Diseases of the nervous system (G00-G99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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