ICD-10-CM 2027
ICD-10 code for tricuspid endocarditis
From the official ICD-10-CM alphabetic index entry “Endocarditis (chronic) (marantic) (nonbacterial) (thrombotic) (valvular) › tricuspid (chronic) (heart) (inactive) (rheumatic) (valve) (with chorea)”. Page updated September 29, 2026.
About coding tricuspid endocarditis
The ICD-10-CM code for tricuspid endocarditis is I07.9 (Rheumatic tricuspid valve disease, unspecified). The official index lists 11 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on I07.9.
Within I07, choose I07.9 (Rheumatic tricuspid valve disease, unspecified) only when documentation doesn't support a more specific option: rheumatic tricuspid stenosis (I07.0), rheumatic tricuspid insufficiency (I07.1), rheumatic tricuspid stenosis and insufficiency (I07.2) and other rheumatic tricuspid valve diseases (I07.8).
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.
More specific tricuspid endocarditis codes (official index)
- with
- aortic (valve) disease I08.2 — Rheumatic disorders of both aortic and tricuspid valves
- mitral (valve) disease I08.3 — Combined rheumatic disorders of mitral, aortic and tricuspid valves
- mitral (valve) disease I08.1 — Rheumatic disorders of both mitral and tricuspid valves
- aortic (valve) disease I08.3 — Combined rheumatic disorders of mitral, aortic and tricuspid valves
- rheumatic fever (conditions in I00)
- active
- inactive or quiescent (with chorea) I07.8 — Other rheumatic tricuspid valve diseases
- active or acute I01.1 — Acute rheumatic endocarditis
- with chorea (acute) (rheumatic) (Sydenham's) I02.0 — Rheumatic chorea with heart involvement
- arteriosclerotic I36.8 — Other nonrheumatic tricuspid valve disorders
- nonrheumatic I36.8 — Other nonrheumatic tricuspid valve disorders
- acute or subacute I33.9 — Acute and subacute endocarditis, unspecified
- specified cause, except rheumatic I36.8 — Other nonrheumatic tricuspid valve disorders
Common questions about tricuspid endocarditis ICD-10 codes
What is the ICD-10 code for tricuspid endocarditis?
- I07.9 — Rheumatic tricuspid valve disease, unspecified. More specific codes apply when the documentation supports them: I08.2, I08.3, I08.1, I08.3 and others below.
What is the ICD-10 code for active or acute tricuspid endocarditis?
- I01.1 — Acute rheumatic endocarditis.
What is the ICD-10 code for arteriosclerotic tricuspid endocarditis?
- I36.8 — Other nonrheumatic tricuspid valve disorders.
What is the ICD-10 code for nonrheumatic tricuspid endocarditis?
- I36.8 — Other nonrheumatic tricuspid valve disorders.
Is I07.9 billable?
- Yes. I07.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I07.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I07.9 as a principal diagnosis.
Is I07.9 a CC or MCC?
- No. I07.9 is neither a CC nor an MCC under MS-DRG v44.0.