ICD-10-CM 2027
ICD-10 code for rheumatic pancarditis
From the official ICD-10-CM alphabetic index entry “Pancarditis (acute) (chronic) › rheumatic”. Page updated September 29, 2026.
About coding rheumatic pancarditis
The ICD-10-CM code for rheumatic pancarditis is I09.89 (Other specified rheumatic heart diseases). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on I09.89.
Within I09.8, choose I09.89 (Other specified rheumatic heart diseases) only when documentation doesn't support a more specific option: rheumatic heart failure (I09.81).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 306 (Cardiac Congenital and Valvular Disorders with MCC, relative weight 1.546) and DRG 307 (Cardiac Congenital and Valvular Disorders without MCC, relative weight 0.9148), in MDC 05 (Diseases and Disorders of the Circulatory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific rheumatic pancarditis codes (official index)
- active or acute I01.8 — Other acute rheumatic heart disease
Common questions about rheumatic pancarditis ICD-10 codes
What is the ICD-10 code for rheumatic pancarditis?
- I09.89 — Other specified rheumatic heart diseases. More specific codes apply when the documentation supports them: I01.8.
What is the ICD-10 code for active or acute rheumatic pancarditis?
- I01.8 — Other acute rheumatic heart disease.
Is I09.89 billable?
- Yes. I09.89 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I09.89 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I09.89 as a principal diagnosis.
Is I09.89 a CC or MCC?
- No. I09.89 is neither a CC nor an MCC under MS-DRG v44.0.