ICD-10 Code for Meningitis
Also indexed as (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic)
The ICD-10-CM code for meningitis is G03.9 — Meningitis, unspecified. This is the code the Alphabetic Index gives for meningitis with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
BillableUnspecified
G03.9 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which meningitis code should you use?
The Alphabetic Index lists 54 codes under Meningitis. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| abacterial | G03.0 | Nonpyogenic meningitis | |
| actinomycotic | A42.81 | Actinomycotic meningitis | |
| adenoviral | A87.1 | Adenoviral meningitis | |
| arbovirus | A87.8 | Other viral meningitis | |
| aseptic | G03.0 | Nonpyogenic meningitis | |
| bacterial | G00.9 | Bacterial meningitis, unspecified | |
| benign recurrent | G03.2 | Benign recurrent meningitis [Mollaret] | |
| candidal | B37.5 | Candidal meningitis | |
| caseous | A17.0 | Tuberculous meningitis | |
| cerebrospinal | A39.0 | Meningococcal meningitis | |
| chronic NEC | G03.1 | Chronic meningitis | |
| clear cerebrospinal fluid NEC | G03.0 | Nonpyogenic meningitis | |
| coxsackievirus | A87.0 | Enteroviral meningitis | |
| cryptococcal | B45.1 | Cerebral cryptococcosis | |
| diplococcal | A39.0 | Meningococcal meningitis | |
| echovirus | A87.0 | Enteroviral meningitis | |
| enteroviral | A87.0 | Enteroviral meningitis | |
| eosinophilic | B83.2 | Angiostrongyliasis due to Parastrongylus cantonensis | |
| epidemic NEC | A39.0 | Meningococcal meningitis | |
| Escherichia coli | G00.8 | Other bacterial meningitis | |
| fibrinopurulent | G00.9 | Bacterial meningitis, unspecified | |
| Friedländer | G00.8 | Other bacterial meningitis | |
| gonococcal | A54.81 | Gonococcal meningitis | |
| gram-negative cocci | G00.9 | Bacterial meningitis, unspecified | |
| gram-positive cocci | G00.9 | Bacterial meningitis, unspecified | |
| Haemophilus | G00.0 | Hemophilus meningitis | |
| H. influenzae | G00.0 | Hemophilus meningitis | |
| infectious | G00.9 | Bacterial meningitis, unspecified | |
| influenzal | G00.0 | Hemophilus meningitis | |
| Klebsiella | G00.8 | Other bacterial meningitis | |
| leptospiral | A27.81 | Aseptic meningitis in leptospirosis | |
| lymphocytic | A87.2 | Lymphocytic choriomeningitis | |
| meningococcal | A39.0 | Meningococcal meningitis | |
| Mima polymorpha | G00.8 | Other bacterial meningitis | |
| Mollaret | G03.2 | Benign recurrent meningitis [Mollaret] | |
| monilial | B37.5 | Candidal meningitis | |
| mycotic NEC | B49 | Unspecified mycosis | |
| Neisseria | A39.0 | Meningococcal meningitis | |
| nonbacterial | G03.0 | Nonpyogenic meningitis | |
| nonpyogenic NEC | G03.0 | Nonpyogenic meningitis | |
| ossificans | G96.198 | Other disorders of meninges, not elsewhere classified | |
| pneumococcal streptococcus pneumoniae | G00.1 | Pneumococcal meningitis | |
| poliovirus | A80.9 | Acute poliomyelitis, unspecified | |
| postmeasles | B05.1 | Measles complicated by meningitis | |
| purulent | G00.9 | Bacterial meningitis, unspecified | |
| pyogenic | G00.9 | Bacterial meningitis, unspecified | |
| Salmonella | A02.21 | Salmonella meningitis | |
| septic | G00.9 | Bacterial meningitis, unspecified | |
| serosa circumscripta NEC | G03.0 | Nonpyogenic meningitis | |
| serous NEC | G93.2 | Benign intracranial hypertension | |
| specified organism NEC | G00.8 | Other bacterial meningitis | |
| sporotrichosis | B42.81 | Cerebral sporotrichosis | |
| staphylococcal | G00.3 | Staphylococcal meningitis | |
| sterile | G03.0 | Nonpyogenic meningitis | |
| Streptococcal | G00.2 | Streptococcal meningitis | |
| suppurative | G00.9 | Bacterial meningitis, unspecified | |
| syphilitic | A52.13 | Late syphilitic meningitis | |
| Torula histolytica | B45.1 | Cerebral cryptococcosis | |
| traumatic | T79.8 | Other early complications of trauma | not billable |
| tuberculous | A17.0 | Tuberculous meningitis | |
| typhoid | A01.01 | Typhoid meningitis | |
| viral NEC | A87.9 | Viral meningitis, unspecified | |
| Yersinia pestis | A20.3 | Plague meningitis |
Meningitis bacterial
| Escherichia coli | G00.8 | Other bacterial meningitis | |
| Friedländer | G00.8 | Other bacterial meningitis | |
| gram-negative | G00.9 | Bacterial meningitis, unspecified | |
| H. influenzae | G00.0 | Hemophilus meningitis | |
| Klebsiella | G00.8 | Other bacterial meningitis | |
| pneumococcal | G00.1 | Pneumococcal meningitis | |
| specified organism NEC | G00.8 | Other bacterial meningitis | |
| staphylococcal | G00.3 | Staphylococcal meningitis | |
| streptococcal | G00.2 | Streptococcal meningitis |
Meningitis fibrinopurulent
| specified organism NEC | G00.8 | Other bacterial meningitis |
Meningitis in
| adenovirus | A87.1 | Adenoviral meningitis | |
| African trypanosomiasis | B56.9 | African trypanosomiasis, unspecified | |
| anthrax | A22.8 | Other forms of anthrax | |
| bacterial disease NEC | A48.8 | Other specified bacterial diseases | |
| Chagas' disease | B57.41 | Meningitis in Chagas' disease | |
| chickenpox | B01.0 | Varicella meningitis | |
| coccidioidomycosis | B38.4 | Coccidioidomycosis meningitis | |
| Diplococcus pneumoniae | G00.1 | Pneumococcal meningitis | |
| enterovirus | A87.0 | Enteroviral meningitis | |
| herpesvirus | B00.3 | Herpesviral meningitis | |
| infectious mononucleosis | B27.92 | Infectious mononucleosis, unspecified with meningitis | |
| leptospirosis | A27.81 | Aseptic meningitis in leptospirosis | |
| Listeria monocytogenes | A32.11 | Listerial meningitis | |
| Lyme disease | A69.21 | Meningitis due to Lyme disease | |
| measles | B05.1 | Measles complicated by meningitis | |
| mumps | B26.1 | Mumps meningitis | |
| neurosyphilis | A52.13 | Late syphilitic meningitis | |
| parasitic disease NEC | B89 | Unspecified parasitic disease | |
| poliovirus | A80.9 | Acute poliomyelitis, unspecified | |
| preventive immunization, inoculation or vaccination | G03.8 | Meningitis due to other specified causes | |
| rubella | B06.02 | Rubella meningitis | |
| Salmonella infection | A02.21 | Salmonella meningitis | |
| specified cause NEC | G03.8 | Meningitis due to other specified causes | |
| Streptococcal pneumoniae | G00.1 | Pneumococcal meningitis | |
| typhoid fever | A01.01 | Typhoid meningitis | |
| varicella | B01.0 | Varicella meningitis | |
| viral disease NEC | A87.8 | Other viral meningitis | |
| whooping cough | A37.90 | Whooping cough, unspecified species without pneumonia | |
| zoster | B02.1 | Zoster meningitis | |
| herpesvirus › zoster | B02.1 | Zoster meningitis |
Meningitis purulent
| specified organism NEC | G00.8 | Other bacterial meningitis |
Meningitis pyogenic
| specified organism NEC | G00.8 | Other bacterial meningitis |
Meningitis septic
| specified organism NEC | G00.8 | Other bacterial meningitis |
Meningitis Streptococcal
| pneumoniae | G00.1 | Pneumococcal meningitis |
Meningitis suppurative
| specified organism NEC | G00.8 | Other bacterial meningitis |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources