Nonrheumatic tricuspid valve disorders (I36) ICD-10-CM
The I36 code range covers nonrheumatic tricuspid valve disorders with 6 ICD-10-CM diagnosis codes. 5 of them are billable and valid for claim submission in fiscal year 2026, 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.
Codes in the I36 Range 6 codes · 5 billable
- I36 Nonrheumatic tricuspid valve disordersNon-billable
- I36.0 Nonrheumatic tricuspid (valve) stenosis
- I36.1 Nonrheumatic tricuspid (valve) insufficiency
- I36.2 Nonrheumatic tricuspid (valve) stenosis with insufficiency
- I36.8 Other nonrheumatic tricuspid valve disorders
- I36.9 Nonrheumatic tricuspid valve disorder, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the I36 range.
Tricuspid Valve Prolapse
Abnormal protrusion of one or more of the leaflets of TRICUSPID VALVE into the RIGHT ATRIUM during SYSTOLE. This allows the backflow of blood into right atrium leading to TRICUSPID VALVE INSUFFICIENCY; SYSTOLIC MURMURS. Its most common cause is not primary valve abnormality but rather the dilation of the RIGHT VENTRICLE and the tricuspid annulus.
About the I36 Code Range
Nonrheumatic tricuspid valve disorders, classified under ICD-10 code I36, cover various conditions affecting the tricuspid valve of the heart that are not caused by rheumatic fever. These codes are used specifically to identify problems such as valve narrowing, leakage, or other abnormalities unrelated to rheumatic disease.
The ICD-10 code range starting at I36 includes distinct diagnoses like I36.0 for tricuspid valve stenosis (narrowing), sometimes due to tumors or prosthetic valve issues, and I36.1 for tricuspid valve insufficiency or regurgitation, which can be functional or linked to valve prostheses. When both stenosis and insufficiency occur together, I36.2 is used. Other unique tricuspid valve abnormalities such as leaflet prolapse, chordae tendineae defects, thrombosis, or valve leaflet rupture fall under I36.8. If the disorder is nonspecific or not detailed, I36.9 covers these unspecified nonrheumatic tricuspid valve disorders. Using exact codes from the I36 section ensures precise documentation and treatment tracking for nonrheumatic tricuspid valve conditions.
Questions About This Page
How many billable codes are in the I36 range?
Of the 6 codes in this range, 5 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the I36 range classify?
The range classifies nonrheumatic tricuspid 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 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
