ICD-10-CM 2027
ICD-10 code for aortic valve insufficiency
From the official ICD-10-CM alphabetic index entry “Insufficiency, insufficient › aortic (valve)”. Page updated September 29, 2026.
About coding aortic valve insufficiency
The ICD-10-CM code for aortic valve insufficiency is I35.1 (Nonrheumatic aortic (valve) insufficiency). The official index lists 16 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on I35.1.
Within I35 (nonrheumatic aortic valve disorders), I35.1 is specifically for nonrheumatic aortic (valve) insufficiency. Related codes cover nonrheumatic aortic (valve) stenosis (I35.0), nonrheumatic aortic (valve) stenosis with insufficiency (I35.2), other nonrheumatic aortic valve disorders (I35.8) and nonrheumatic aortic valve disorder, unspecified (I35.9).
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 aortic valve insufficiency codes (official index)
- with
- mitral (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
- stenosis I35.2 — Nonrheumatic aortic (valve) stenosis with insufficiency
- tricuspid (valve) disease I08.2 — Rheumatic disorders of both aortic and tricuspid valves
- with mitral (valve) disease I08.3 — Combined rheumatic disorders of mitral, aortic and tricuspid valves
- congenital Q23.1 — Congenital insufficiency of aortic valve
- rheumatic I06.1 — Rheumatic aortic insufficiency
- with
- mitral (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
- stenosis I06.2 — Rheumatic aortic stenosis with insufficiency
- with mitral (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 I08.2 — Rheumatic disorders of both aortic and tricuspid valves
- with mitral (valve) disease I08.3 — Combined rheumatic disorders of mitral, aortic and tricuspid valves
- specified cause NEC I35.1 — Nonrheumatic aortic (valve) insufficiency
- syphilitic A52.03 — Syphilitic endocarditis
Common questions about aortic valve insufficiency ICD-10 codes
What is the ICD-10 code for aortic valve insufficiency?
- I35.1 — Nonrheumatic aortic (valve) insufficiency. More specific codes apply when the documentation supports them: I08.0, I08.3, I35.2, I08.2 and others below.
What is the ICD-10 code for congenital aortic valve insufficiency?
- Q23.1 — Congenital insufficiency of aortic valve.
What is the ICD-10 code for rheumatic aortic valve insufficiency?
- I06.1 — Rheumatic aortic insufficiency.
What is the ICD-10 code for syphilitic aortic valve insufficiency?
- A52.03 — Syphilitic endocarditis.
Is I35.1 billable?
- Yes. I35.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I35.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I35.1 as a principal diagnosis.
Is I35.1 a CC or MCC?
- No. I35.1 is neither a CC nor an MCC under MS-DRG v44.0.