ICD-10 Code for Meningitis

The default ICD-10-CM 2027 code for meningitis (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic) is G03.9 – Meningitis, unspecified. More specific codes depend on the details documented, as listed in the official index (54 codes, 53 billable).

Main code: G03.9 – Meningitis, unspecified
Billable: Yes

Index entries for Meningitis

abacterial – G03.0
actinomycotic – A42.81
adenoviral – A87.1
arbovirus – A87.8
aseptic (acute) – G03.0
bacterial – G00.9
- Escherichia coli (E. coli) – G00.8
- Friedländer (bacillus) – G00.8
- gram-negative – G00.9
- H. influenzae – G00.0
- Klebsiella – G00.8
- pneumococcal – G00.1
- specified organism NEC – G00.8
- staphylococcal – G00.3
- streptococcal (acute) – G00.2
benign recurrent (Mollaret) – G03.2
candidal – B37.5
caseous (tuberculous) – A17.0
cerebrospinal – A39.0
chronic NEC – G03.1
clear cerebrospinal fluid NEC – G03.0
coxsackievirus – A87.0
cryptococcal – B45.1
diplococcal (gram positive) – A39.0
echovirus – A87.0
enteroviral – A87.0
eosinophilic – B83.2
epidemic NEC – A39.0
Escherichia coli (E. coli) – G00.8
fibrinopurulent – G00.9
- specified organism NEC – G00.8
Friedländer (bacillus) – G00.8
gonococcal – A54.81
gram-negative cocci – G00.9
gram-positive cocci – G00.9
Haemophilus (influenzae) – G00.0
H. influenzae – G00.0
in (due to)
- adenovirus – A87.1
- African trypanosomiasis – B56.9 – G02 [manifestation]
- anthrax – A22.8
- bacterial disease NEC – A48.8 – G01 [manifestation]
- Chagas' disease (chronic) – B57.41
- chickenpox – B01.0
- coccidioidomycosis – B38.4
- Diplococcus pneumoniae – G00.1
- enterovirus – A87.0
- herpes (simplex) – B00.3
  - zoster – B02.1
- infectious mononucleosis – B27.92
- leptospirosis – A27.81
- Listeria monocytogenes – A32.11
- Lyme disease – A69.21
- measles – B05.1
- mumps (virus) – B26.1
- neurosyphilis (late) – A52.13
- parasitic disease NEC – B89 – G02 [manifestation]
- poliovirus – A80.9 – G02 [manifestation]
- preventive immunization, inoculation or vaccination – G03.8
- rubella – B06.02
- Salmonella infection – A02.21
- specified cause NEC – G03.8
- Streptococcal pneumoniae – G00.1
- typhoid fever – A01.01
- varicella – B01.0
- viral disease NEC – A87.8
- whooping cough – A37.90
- zoster – B02.1
infectious – G00.9
influenzal (H. influenzae) – G00.0
Klebsiella – G00.8
leptospiral (aseptic) – A27.81
lymphocytic (acute) (benign) (serous) – A87.2
meningococcal – A39.0
Mima polymorpha – G00.8
Mollaret (benign recurrent) – G03.2
monilial – B37.5
mycotic NEC – B49 – G02 [manifestation]
Neisseria – A39.0
nonbacterial – G03.0
nonpyogenic NEC – G03.0
ossificans – G96.198
pneumococcal streptococcus pneumoniae – G00.1
poliovirus – A80.9 – G02 [manifestation]
postmeasles – B05.1
purulent – G00.9
- specified organism NEC – G00.8
pyogenic – G00.9
- specified organism NEC – G00.8
Salmonella (arizonae) (Cholerae-Suis) (enteritidis) (typhimurium) – A02.21
septic – G00.9
- specified organism NEC – G00.8
serosa circumscripta NEC – G03.0
serous NEC – G93.2
specified organism NEC – G00.8
sporotrichosis – B42.81
staphylococcal – G00.3
sterile – G03.0
Streptococcal (acute) – G00.2
- pneumoniae – G00.1
suppurative – G00.9
- specified organism NEC – G00.8
syphilitic (late) (tertiary) – A52.13
- acute – A51.41
- congenital – A50.41
- secondary – A51.41
Torula histolytica (cryptococcal) – B45.1
traumatic (complication of injury) – T79.8 (header)
tuberculous – A17.0
typhoid – A01.01
viral NEC – A87.9
Yersinia pestis – A20.3

How to choose the right code

Start with the main term, then pick the indented subterm that matches the documentation (type, cause, site, laterality, episode of care). Always confirm the code in the tabular list: follow its Excludes1/Excludes2, “code first” and “use additional code” notes, and add a 7th character where required.

Source: CDC/NCHS ICD-10-CM FY2027 alphabetic index.