I09.0

Billable
ChapterI00–I99
Ranksubcategory
Official Description

Rheumatic myocarditis

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Billable/specific code (valid for reimbursement).
  • •Chapter 9: Diseases of the Circulatory System (I00-I99).

Instructional Notes

Excludes1(Not coded here)
  • myocarditis not specified as rheumatic (I51.4)
General instructions are available for the parent sections:
View CH9 Notes

Clinical Hierarchy

CH9Diseases of the circulatory system (I00-I99)
I05-I09Chronic rheumatic heart diseases (I05-I09)
I09Other rheumatic heart diseases
I09.0Rheumatic myocarditis

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to I09.0:

chapterCH9
Diseases of the circulatory system (I00-I99)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to I09.0. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

12 raw paths
Cardiomyopathy (familial) (idiopathic)1 unique routes
rheumatic→I09.0
Degeneration, degenerative2 unique routes
myocardial, myocardium (fatty) (hyaline) (senile)(2 variants)
with rheumatic fever (conditions in I00)→I09.0(2 variants)
inactive or quiescent (with chorea)→I09.0
Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)1 unique routes
rheumatic (active) (acute) (chronic) (subacute)
inactive or quiescent with
myocarditis, myocardial degeneration (conditions in I51.4)→I09.0
Insufficiency, insufficient3 unique routes
myocardial, myocardium (with arteriosclerosis)(3 variants)
rheumatic→I09.0
with(2 variants)
rheumatic fever (conditions in I00)→I09.0(2 variants)
inactive or quiescent (with chorea)→I09.0
Myocarditis (with arteriosclerosis)(chronic)(fibroid) (interstitial) (old) (progressive) (senile)3 unique routes
rheumatic (chronic) (inactive) (with chorea)→I09.0
with(2 variants)
rheumatic fever (conditions in I00)→I09.0(2 variants)
inactive or quiescent (with chorea)→I09.0
Rheumatic (acute) (subacute)2 unique routes
degeneration, myocardium→I09.0
myocarditis (chronic) (inactive) (with chorea)→I09.0

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 314
Other Circulatory System Diagnoses with MCC
DRG 315
Other Circulatory System Diagnoses with CC
DRG 316
Other Circulatory System Diagnoses without CC/MCC

Cross Reference

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Find surgical and procedural codes related to Rheumatic myocarditis.

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