G00

Non-Billable
ChapterG00–G99
Rankcategory
Official Description

Bacterial meningitis, not elsewhere classified

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)

Instructional Notes

Includes
  • bacterial arachnoiditis
  • bacterial leptomeningitis
  • bacterial meningitis
  • bacterial pachymeningitis
Excludes1(Not coded here)
  • bacterial meningoencephalitis (G04.2)
  • bacterial meningomyelitis (G04.2)

Clinical Hierarchy

CH6Diseases of the nervous system (G00-G99)
G00-G09Inflammatory diseases of the central nervous system (G00-G09)
G00Bacterial meningitis, not elsewhere classified
G00.0Hemophilus meningitis
G00.1Pneumococcal meningitis
G00.2Streptococcal meningitis
G00.3Staphylococcal meningitis
G00.8Other bacterial meningitis
G00.9Bacterial meningitis, unspecified

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to G00:

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

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to G00. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

25 raw paths
Meningitis (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic)25 unique routes
bacterial→G00(10 variants)
Escherichia coli (E. coli)→G00
Friedländer (bacillus)→G00
gram-negative→G00
H. influenzae→G00
Klebsiella→G00
pneumococcal→G00
specified organism NEC→G00
staphylococcal→G00
streptococcal (acute)→G00
Escherichia coli (E. coli)→G00
fibrinopurulent→G00(2 variants)
specified organism NEC→G00
Friedländer (bacillus)→G00
gram-negative cocci→G00
gram-positive cocci→G00
H. influenzae→G00
Haemophilus (influenzae)→G00
in (due to)(2 variants)
Diplococcus pneumoniae→G00
Streptococcal pneumoniae→G00
infectious→G00
Klebsiella→G00
Mima polymorpha→G00
Streptococcal (acute)→G00(2 variants)
pneumoniae→G00

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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