ICD-10 Code G00.1 – Pneumococcal Meningitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G00.1 – Pneumococcal meningitis
What it is
G00.1 identifies meningitis caused by Streptococcus pneumoniae. Use it when the record clearly documents pneumococcal meningitis rather than another bacterial or viral cause.
Clinical signs
Clinical features vary; refer to documentation. Typical meningitis findings may include headache, fever, neck stiffness, altered mental status, or photophobia, with pneumococcal infection confirmed or stated by the provider.
When to use this code
Use G00.1 when the provider diagnoses pneumococcal meningitis, including suspected or confirmed cases documented as due to Streptococcus pneumoniae. Code from the final diagnosis and supporting notes, not from culture results alone unless linked in the record.
Do not use for
Do not use this code for meningitis caused by other organisms, unspecified bacterial meningitis, or meningitis without documented pneumococcal etiology. Check documentation if the cause is unclear.
Coding tip
Verify that pneumococcal cause is explicitly documented before assigning G00.1.