Other rheumatic heart diseases (I09)

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.