ICD-10-CM 2027
ICD-10 code for viral cardiomyopathy
From the official ICD-10-CM alphabetic index entry “Cardiomyopathy (familial) (idiopathic) › viral”. Page updated September 29, 2026.
About coding viral cardiomyopathy
The ICD-10-CM code for viral cardiomyopathy is B33.24 (Viral cardiomyopathy).
Within B33.2 (viral carditis), B33.24 is specifically for viral cardiomyopathy. Related codes cover unspecified (B33.20), endocarditis (B33.21), myocarditis (B33.22) and pericarditis (B33.23).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
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) and DRG 316 (Other Circulatory System Diagnoses without CC/MCC, relative weight 0.6677), in MDC 05 (Diseases and Disorders of the Circulatory 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 viral cardiomyopathy ICD-10 codes
What is the ICD-10 code for viral cardiomyopathy?
- B33.24 — Viral cardiomyopathy.
Is B33.24 billable?
- Yes. B33.24 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can B33.24 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict B33.24 as a principal diagnosis.
Is B33.24 a CC or MCC?
- No. B33.24 is neither a CC nor an MCC under MS-DRG v44.0.