G00.9 — Bacterial meningitis, unspecified
G00.9 is a billable, specific ICD-10-CM code for bacterial meningitis, unspecified. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Meningitis due to gram-negative bacteria, unspecified
- Purulent meningitis NOS
- Pyogenic meningitis NOS
- Suppurative meningitis NOS
Risk adjustment
G00.9 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
G00.9 is named in 6 Medicare coverage policies — 6 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56551Billing and Coding: Visual Fields Testing
- A56799Billing and Coding: Visual Fields Testing
- A58710Billing and Coding: MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing
- A58720Billing and Coding: MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing
How G00.9 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to G00.9.
- Meningitis›bacterial
- Meningitis›fibrinopurulent
- Meningitis›gram-negative cocci
- Meningitis›gram-positive cocci
- Meningitis›infectious
- Meningitis›purulent
- Meningitis›pyogenic
- Meningitis›septic
- Meningitis›suppurative
- Meningitis›bacterial›gram-negative
Related codes at this level
Codes that share G00. If G00.9 is not quite right, the correct code is usually one of these.
Questions about G00.9
- Is G00.9 a billable ICD-10-CM code?
- Yes. G00.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does G00.9 sit in the tabular list?
- Diseases of the nervous system (G00-G99), in the block Inflammatory diseases of the central nervous system (G00-G09).