ICD-10-CM 2027
ICD-10 code for meningococcal myocarditis
From the official ICD-10-CM alphabetic index entry “Myocarditis (with arteriosclerosis)(chronic)(fibroid) (interstitial) (old) (progressive) (senile) › meningococcal”. Page updated September 29, 2026.
About coding meningococcal myocarditis
The ICD-10-CM code for meningococcal myocarditis is A39.52 (Meningococcal myocarditis).
Within A39.5 (meningococcal heart disease), A39.52 is specifically for meningococcal myocarditis. Related codes cover carditis, unspecified (A39.50), endocarditis (A39.51) and pericarditis (A39.53).
As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" 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 314 (Other Circulatory System Diagnoses with MCC, relative weight 2.0873), DRG 315 (Other Circulatory System Diagnoses with CC, relative weight 0.9508), DRG 316 (Other Circulatory System Diagnoses without CC/MCC, relative weight 0.6677), DRG 791 (Prematurity with Major Problems, relative weight 4.1075) and DRG 793 (Full Term Neonate with Major Problems, relative weight 4.2195), in MDC 05 (Diseases and Disorders of the Circulatory System) and MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), 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 meningococcal myocarditis ICD-10 codes
What is the ICD-10 code for meningococcal myocarditis?
- A39.52 — Meningococcal myocarditis.
Is A39.52 billable?
- Yes. A39.52 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can A39.52 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict A39.52 as a principal diagnosis.
Is A39.52 a CC or MCC?
- A39.52 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.