In simple words: This code is for rheumatic fever when the heart isn't affected.Rheumatic fever is a condition causing inflammation, often in the joints. This code specifically means the heart is not involved.

This ICD-10-CM code classifies rheumatic fever without any mention of cardiac involvement.It encompasses cases of acute or subacute rheumatic arthritis,excluding instances where rheumatic fever affects the heart (which would fall under codes I01.0-I01.9).

Example 1: A 10-year-old presents with migratory polyarthritis, fever, and elevated inflammatory markers.Cardiac examination is normal.Code I00 is appropriate., A 15-year-old has a history of rheumatic fever, with past joint pain that has resolved.Current examination shows no cardiac involvement, no joint pain, and no fever. Code I00 could be used for the resolved episode., An adult patient presents with recurrent episodes of joint pain consistent with rheumatic fever, but cardiac evaluation reveals no abnormalities. Code I00 is assigned.

Detailed history of presenting symptoms (e.g., joint pain, fever, rash).Physical examination findings, including joint examination.Laboratory results (e.g., inflammatory markers, throat culture for streptococcal infection).Cardiac evaluation (ECG, echocardiogram) to rule out heart involvement.

** Accurate coding requires careful differentiation between rheumatic fever with and without heart involvement.If cardiac involvement is suspected, further evaluation is crucial and appropriate I01 codes should be used.