ICD-10-CM 2027
ICD-10 code for suppurative myocarditis
From the official ICD-10-CM alphabetic index entry “Myocarditis (with arteriosclerosis)(chronic)(fibroid) (interstitial) (old) (progressive) (senile) › suppurative”. Page updated September 29, 2026.
About coding suppurative myocarditis
The ICD-10-CM code for suppurative myocarditis is I40.0 (Infective myocarditis).
Within I40 (acute myocarditis), I40.0 is specifically for infective myocarditis. Related codes cover isolated myocarditis (I40.1), other acute myocarditis (I40.8) and unspecified (I40.9).
Use an additional code (B95-B97) to identify infectious agent.
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.
Common questions about suppurative myocarditis ICD-10 codes
What is the ICD-10 code for suppurative myocarditis?
- I40.0 — Infective myocarditis.
Is I40.0 billable?
- Yes. I40.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I40.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I40.0 as a principal diagnosis.
Is I40.0 a CC or MCC?
- I40.0 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.