G09

Billable
ChapterG00–G99
Rankcategory
Official Description

Sequelae of inflammatory diseases of central nervous system

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Billable/specific code (valid for reimbursement).
  • •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)

Instructional Notes

Code First
  • condition resulting from (sequela) of inflammatory diseases of central nervous system

Clinical Hierarchy

CH6Diseases of the nervous system (G00-G99)
G00-G09Inflammatory diseases of the central nervous system (G00-G09)
G09Sequelae of inflammatory diseases of central nervous system

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to G09:

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

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to G09. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

14 raw paths
Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)4 unique routes
cerebellum, cerebellar
sequelae→G09
cerebral (embolic)
sequelae→G09
extradural
brain
sequelae→G09
subdural
brain
sequelae→G09
Parencephalitis1 unique routes
sequelae→G09
Sequelae (of)6 unique routes
abscess, intracranial or intraspinal (conditions in G06)→G09
encephalitis or encephalomyelitis (conditions in G04)→G09
infection, pyogenic, intracranial or intraspinal→G09
meningitis(2 variants)
bacterial (conditions in G00)→G09
other or unspecified cause (conditions in G03)→G09
phlebitis or thrombophlebitis of intracranial or intraspinal venous sinuses and veins (conditions in G08)→G09
Suppuration, suppurative1 unique routes
brain
sequelae→G09
Thrombophlebitis2 unique routes
cerebral (sinus) (vein)
sequelae→G09
intracranial venous sinus (any)
sequelae→G09

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 091
Other Disorders of Nervous System with MCC
DRG 092
Other Disorders of Nervous System with CC
DRG 093
Other Disorders of Nervous System without CC/MCC

Cross Reference

Find Procedures (ICD-10-PCS)

Find surgical and procedural codes related to Sequelae of inflammatory diseases of central nervous system.

Search PCS Codes