All ICD10 Codes

G99

Non-Billable
ChapterG00–G99
Rankcategory
Official Description

Other disorders of nervous system in diseases classified elsewhere

Use a more specific code (3 billable)
G99.0Autonomic neuropathy in diseases classified elsewhereG99.2Myelopathy in diseases classified elsewhereG99.8Other specified disorders of nervous system in diseases classified elsewhere
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)

Clinical Hierarchy

BillableHas subcodes
CH6Diseases of the nervous system (G00-G99)
G89-G99Other disorders of the nervous system (G89-G99)
G99Other disorders of nervous system in diseases classified elsewhereNot billable
G99.0Autonomic neuropathy in diseases classified elsewhereBillable
G99.2Myelopathy in diseases classified elsewhereBillable
G99.8Other specified disorders of nervous system in diseases classified elsewhereBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to 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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