Other rheumatic heart diseases (I09) ICD-10-CM
The I09 code range covers other rheumatic heart diseases with 8 ICD-10-CM diagnosis codes. 6 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Codes in the I09 Range 8 codes · 6 billable
- I09 Other rheumatic heart diseasesNon-billable
- I09.0 Rheumatic myocarditis
- I09.1 Rheumatic diseases of endocardium, valve unspecified
- I09.2 Chronic rheumatic pericarditis
- I09.8 Other specified rheumatic heart diseasesNon-billable
- I09.81 Rheumatic heart failure
- I09.89 Other specified rheumatic heart diseases
- I09.9 Rheumatic heart disease, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the I09 range.
Rheumatic Heart Disease
Cardiac manifestation of systemic rheumatological conditions, such as RHEUMATIC FEVER. Rheumatic heart disease can involve any part the heart, most often the HEART VALVES and the ENDOCARDIUM.
About the I09 Code Range
The ICD-10 code section I09 covers various other rheumatic heart diseases, which are heart conditions caused by rheumatic fever affecting different heart layers and valves. These codes help specify conditions like rheumatic myocarditis, pericarditis, and rheumatic heart failure.
This section is used for diagnosing and coding less common rheumatic heart diseases beyond typical valvular issues. For example, I09.0 is for rheumatic myocarditis, also known as chronic rheumatic carditis or rheumatoid myocarditis, indicating inflammation of the heart muscle from rheumatic fever. I09.1 applies to rheumatic diseases affecting the heart’s endocardium or valves when the valve involved is not specified; terms like chronic rheumatic carditis and rheumatic heart valve stenosis relate directly to this code. Similarly, I09.2 defines chronic rheumatic pericarditis, where inflammation involves the heart’s outer lining. Rheumatic heart failure, with synonyms such as chronic congestive rheumatic heart failure, falls under I09.81. This section also includes two codes (I09.8 and I09.89) for other specified rheumatic heart diseases and I09.9 for unspecified rheumatic heart disease, supporting precise documentation in clinical and billing contexts. Understanding the synonyms helps in selecting the accurate ICD-10 code for specific rheumatic heart conditions.
Questions About This Page
How many billable codes are in the I09 range?
Of the 8 codes in this range, 6 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 I09 range classify?
The range classifies other rheumatic heart diseases. 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.
