ICD-10-CM 2027
ICD-10 code for tricuspid atheroma
From the official ICD-10-CM alphabetic index entry “Atheroma, atheromatous › tricuspid (heart) (valve)”. Page updated September 29, 2026.
About coding tricuspid atheroma
The ICD-10-CM code for tricuspid atheroma is I36.8 (Other nonrheumatic tricuspid valve disorders).
Within I36, choose I36.8 (Other nonrheumatic tricuspid valve disorders) only when documentation doesn't support a more specific option: nonrheumatic tricuspid (valve) stenosis (I36.0), nonrheumatic tricuspid (valve) insufficiency (I36.1), nonrheumatic tricuspid (valve) stenosis with insufficiency (I36.2) and nonrheumatic tricuspid valve disorder, unspecified (I36.9).
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 306 (Cardiac Congenital and Valvular Disorders with MCC, relative weight 1.546) and DRG 307 (Cardiac Congenital and Valvular Disorders without MCC, relative weight 0.9148), 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 tricuspid atheroma ICD-10 codes
What is the ICD-10 code for tricuspid atheroma?
- I36.8 — Other nonrheumatic tricuspid valve disorders.
Is I36.8 billable?
- Yes. I36.8 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I36.8 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I36.8 as a principal diagnosis.
Is I36.8 a CC or MCC?
- No. I36.8 is neither a CC nor an MCC under MS-DRG v44.0.