ICD-10-CM 2027
ICD-10 code for Mollaret meningitis
From the official ICD-10-CM alphabetic index entry “Meningitis (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic) › Mollaret (benign recurrent)”. Page updated September 29, 2026.
About coding Mollaret meningitis
The ICD-10-CM code for Mollaret meningitis is G03.2 (Benign recurrent meningitis [Mollaret]).
Within G03 (meningitis due to other and unspecified causes), G03.2 is specifically for benign recurrent meningitis [Mollaret]. Related codes cover nonpyogenic meningitis (G03.0), chronic meningitis (G03.1), meningitis due to other specified causes (G03.8) and meningitis, unspecified (G03.9).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 075 (Viral Meningitis with CC/MCC, relative weight 1.7707) and DRG 076 (Viral Meningitis without CC/MCC, relative weight 0.8675), in MDC 01 (Diseases and Disorders of the Nervous System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about Mollaret meningitis ICD-10 codes
What is the ICD-10 code for Mollaret meningitis?
- G03.2 — Benign recurrent meningitis [Mollaret].
Is G03.2 billable?
- Yes. G03.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G03.2 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G03.2 as a principal diagnosis.
Is G03.2 a CC or MCC?
- G03.2 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.