ICD-10 Code I36 – Nonrheumatic tricuspid valve disorders (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I36 – Nonrheumatic tricuspid valve disorders
What it is
I36 identifies disorders of the tricuspid valve that are not caused by rheumatic heart disease. Use it when documentation describes tricuspid valve disease, but rheumatic origin is not stated.
Clinical signs
Clinical features vary; refer to documentation. Commonly documented findings may include tricuspid regurgitation, tricuspid stenosis, or mixed valve dysfunction confirmed by exam or imaging.
When to use this code
Use I36 when the record clearly documents a nonrheumatic tricuspid valve disorder and does not specify a more detailed subcode. It may also apply when the provider describes tricuspid valve disease without rheumatic cause. Check documentation if the etiology is unclear or another valve disorder is the primary diagnosis.
Do not use for
Do not use this code for rheumatic tricuspid valve disease. Also avoid it when the record identifies a different valve disorder or a more specific tricuspid code is available.
Coding tip
Review the note for rheumatic versus nonrheumatic wording before assigning I36.