ICD-10-CM 2027
ICD-10 code for mitral valve insufficiency
From the official ICD-10-CM alphabetic index entry “Insufficiency, insufficient › mitral (valve)”. Page updated September 29, 2026.
About coding mitral valve insufficiency
The ICD-10-CM code for mitral valve insufficiency is I34.0 (Nonrheumatic mitral (valve) insufficiency). The official index lists 18 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on I34.0.
Within I34 (nonrheumatic mitral valve disorders), I34.0 is specifically for nonrheumatic mitral (valve) insufficiency. Related codes cover nonrheumatic mitral (valve) prolapse (I34.1), nonrheumatic mitral (valve) stenosis (I34.2), other nonrheumatic mitral valve disorders (I34.8) and nonrheumatic mitral valve disorder, unspecified (I34.9).
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.
More specific mitral valve insufficiency codes (official index)
- with
- aortic valve disease I08.0 — Rheumatic disorders of both mitral and aortic valves
- with tricuspid (valve) disease I08.3 — Combined rheumatic disorders of mitral, aortic and tricuspid valves
- obstruction or stenosis I05.2 — Rheumatic mitral stenosis with insufficiency
- with aortic valve disease I08.0 — Rheumatic disorders of both mitral and aortic valves
- tricuspid (valve) disease I08.1 — Rheumatic disorders of both mitral and tricuspid valves
- with aortic (valve) disease I08.3 — Combined rheumatic disorders of mitral, aortic and tricuspid valves
- congenital Q23.3 — Congenital mitral insufficiency
- rheumatic I05.1 — Rheumatic mitral insufficiency
- with
- aortic valve disease I08.0 — Rheumatic disorders of both mitral and aortic valves
- with tricuspid (valve) disease I08.3 — Combined rheumatic disorders of mitral, aortic and tricuspid valves
- obstruction or stenosis I05.2 — Rheumatic mitral stenosis with insufficiency
- with aortic valve disease I08.0 — Rheumatic disorders of both mitral and aortic valves
- with tricuspid (valve) disease I08.3 — Combined rheumatic disorders of mitral, aortic and tricuspid valves
- tricuspid (valve) disease I08.1 — Rheumatic disorders of both mitral and tricuspid valves
- with aortic (valve) disease I08.3 — Combined rheumatic disorders of mitral, aortic and tricuspid valves
- active or acute I01.1 — Acute rheumatic endocarditis
- with chorea, rheumatic (Sydenham's) I02.0 — Rheumatic chorea with heart involvement
- specified cause, except rheumatic I34.0 — Nonrheumatic mitral (valve) insufficiency
Common questions about mitral valve insufficiency ICD-10 codes
What is the ICD-10 code for mitral valve insufficiency?
- I34.0 — Nonrheumatic mitral (valve) insufficiency. More specific codes apply when the documentation supports them: I08.0, I08.3, I05.2, I08.0 and others below.
What is the ICD-10 code for congenital mitral valve insufficiency?
- Q23.3 — Congenital mitral insufficiency.
What is the ICD-10 code for rheumatic mitral valve insufficiency?
- I05.1 — Rheumatic mitral insufficiency.
Is I34.0 billable?
- Yes. I34.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I34.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I34.0 as a principal diagnosis.
Is I34.0 a CC or MCC?
- No. I34.0 is neither a CC nor an MCC under MS-DRG v44.0.