G89-G99

Non-Billable
ChapterG00–G99
Rankblock
Official Description

Other disorders of the nervous system (G89-G99)

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 6: Diseases of the Nervous System (G00-G99).

CH6 Parent Instructions

Excludes2(Not included here)
  • 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)

Clinical Hierarchy

CH6Diseases of the nervous system (G00-G99)
G89-G99Other disorders of the nervous system (G89-G99)
G89Pain, not elsewhere classified
G90Disorders of autonomic nervous system
G91Hydrocephalus
G92Toxic encephalopathy
G93Other disorders of brain
G94Other disorders of brain in diseases classified elsewhere
G95Other and unspecified diseases of spinal cord
G96Other disorders of central nervous system
G97Intraoperative and postprocedural complications and disorders of nervous system, not elsewhere classified
G98Other disorders of nervous system not elsewhere classified
G99Other disorders of nervous system in diseases classified elsewhere

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to G89-G99:

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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