G03

Non-Billable
ChapterG00–G99
Rankcategory
Official Description

Meningitis due to other and unspecified causes

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
  • arachnoiditis NOS
  • leptomeningitis NOS
  • meningitis NOS
  • pachymeningitis NOS
Excludes1(Not coded here)
  • meningoencephalitis (G04.-)
  • meningomyelitis (G04.-)

Clinical Hierarchy

CH6Diseases of the nervous system (G00-G99)
G00-G09Inflammatory diseases of the central nervous system (G00-G09)
G03Meningitis due to other and unspecified causes
G03.0Nonpyogenic meningitis
G03.1Chronic meningitis
G03.2Benign recurrent meningitis [Mollaret]
G03.8Meningitis due to other specified causes
G03.9Meningitis, unspecified

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to G03:

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

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to G03. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

14 raw paths
Complication (s) (from) (of)1 unique routes
vaccination
meningitis→G03
Meningitis (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic)13 unique routes
Direct index entry→G03
abacterial→G03
aseptic (acute)→G03
benign recurrent (Mollaret)→G03
chronic NEC→G03
clear cerebrospinal fluid NEC→G03
in (due to)(2 variants)
preventive immunization, inoculation or vaccination→G03
specified cause NEC→G03
Mollaret (benign recurrent)→G03
nonbacterial→G03
nonpyogenic NEC→G03
serosa circumscripta NEC→G03
sterile→G03

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

Find Procedures (ICD-10-PCS)

Find surgical and procedural codes related to Meningitis due to other and unspecified causes.

Search PCS Codes