Nonrheumatic mitral valve disorders (I34) ICD-10-CM
The I34 code range covers nonrheumatic mitral valve disorders with 8 ICD-10-CM diagnosis codes. 6 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- mitral valve disease I05.9
- mitral valve failure I05.8
- mitral valve stenosis I05.0
- mitral valve disorder of unspecified cause with diseases of aortic and/or tricuspid valves I08
- mitral valve disorder of unspecified cause with mitral stenosis or obstruction I05.0
- mitral valve disorder specified as congenital Q23.2 Q23.9
- mitral valve disorder specified as rheumatic I05
Codes in the I34 Range 8 codes · 6 billable
- I34 Nonrheumatic mitral valve disordersNon-billable
- I34.0 Nonrheumatic mitral (valve) insufficiency
- I34.1 Nonrheumatic mitral (valve) prolapse
- I34.2 Nonrheumatic mitral (valve) stenosis
- I34.8 Other nonrheumatic mitral valve disordersNon-billable
- I34.81 Nonrheumatic mitral (valve) annulus calcification
- I34.89 Other nonrheumatic mitral valve disorders
- I34.9 Nonrheumatic mitral valve disorder, unspecified
About the I34 Code Range
These heart conditions affect the mitral valve and are not rheumatic.
The subdivisions distinguish valve leakage (I34.0), prolapse (I34.1), and narrowing (I34.2). Under other mitral valve disorders (I34.8), I34.81 identifies calcium buildup in the valve’s ring, while I34.89 covers other disorders. I34.9 identifies an unspecified nonrheumatic mitral valve disorder.
Questions About This Page
How many billable codes are in the I34 range?
Of the 8 codes in this range, 6 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the I34 range classify?
The range classifies nonrheumatic mitral valve disorders. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
