Rheumatic chorea (I02)

The ICD-10 code I02 and its subcodes specifically identify cases of rheumatic chorea, a neurological disorder linked to rheumatic fever. The codes distinguish between symptoms with and without heart involvement.

The code I02.0 is used when rheumatic chorea affects the heart, often referred to by synonyms such as "autoimmune movement disorder," "carditis due to rheumatic fever," or "chorea due to immunological disorder." This code is crucial in documenting cases where rheumatic fever causes both movement problems and inflammation of the heart (endocarditis). Conversely, I02.9 applies to rheumatic chorea without heart complications. It covers terms like "secondary tic disorder" and focuses on movement disorders following an infectious cause but without cardiac involvement. Using these precise codes helps clinicians and coders capture the specific presentation of rheumatic chorea, whether or not it includes cardiac disease.