ICD-10-CM 2027
ICD-10 code for rheumatic pericarditis
From the official ICD-10-CM alphabetic index entry “Pericarditis (with decompensation) (with effusion) › rheumatic (active) (acute) (with effusion) (with pneumonia)”. Page updated September 29, 2026.
About coding rheumatic pericarditis
The ICD-10-CM code for rheumatic pericarditis is I01.0 (Acute rheumatic pericarditis). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on I01.0.
Within I01 (rheumatic fever with heart involvement), I01.0 is specifically for acute rheumatic pericarditis. Related codes cover acute rheumatic endocarditis (I01.1), acute rheumatic myocarditis (I01.2), other acute rheumatic heart disease (I01.8) and acute rheumatic heart disease, unspecified (I01.9).
Don't report I01.0 together with the conditions in its Excludes1 note: acute pericarditis not specified as rheumatic (I30.-).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
More specific rheumatic pericarditis codes (official index)
Don't confuse with (Excludes1 for I01.0)
- acute pericarditis not specified as rheumatic (I30.-)
Common questions about rheumatic pericarditis ICD-10 codes
What is the ICD-10 code for rheumatic pericarditis?
- I01.0 — Acute rheumatic pericarditis. More specific codes apply when the documentation supports them: I02.0, I09.2.
What is the ICD-10 code for chronic or inactive rheumatic pericarditis?
- I09.2 — Chronic rheumatic pericarditis.
Is I01.0 billable?
- Yes. I01.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I01.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I01.0 as a principal diagnosis.
Is I01.0 a CC or MCC?
- I01.0 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.