Other forms of heart disease (I30-I5A) ICD-10-CM
The I30–I5A section covers other forms of heart disease with 176 ICD-10-CM diagnosis codes, of which 140 are billable in fiscal year 2026. The section is organized into the 24 code ranges listed below.
Code Ranges in This Section 24 ranges · 176 codes
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the I30–I5A Code Range
ICD-10 codes I30 through I5A cover a variety of heart conditions outside the commonly classified types, focusing on inflammatory diseases, valve disorders, conduction problems, arrhythmias, cardiomyopathies, and heart failure. These codes help specify unique heart diseases like pericarditis, endocarditis, and different types of cardiomyopathy for precise diagnosis and treatment planning.
This range includes acute and chronic pericarditis (including idiopathic and infective forms), detailed nonrheumatic valve disorders affecting mitral, aortic, tricuspid, and pulmonary valves, and conduction abnormalities such as atrioventricular blocks and bundle-branch blocks. For example, code I30.0 corresponds to “acute nonspecific idiopathic pericarditis,” also known as idiopathic recurrent pericarditis, while I34.1 is used for nonrheumatic mitral valve prolapse. It also covers various forms of myocarditis and cardiomyopathies, like dilated (I42.0) and hypertrophic cardiomyopathy (I42.1), essential for distinguishing different myocardial disorders. Codes for heart rhythm disturbances such as atrial fibrillation (I48) and ventricular tachycardia (I47.2) are included, aiding in recognizing cardiac dysrhythmias. Additionally, heart failure forms—including systolic, diastolic, and combined types—are classified (e.g., I50.21 for acute systolic heart failure). This grouping also specifies complications and ill-defined heart diseases, ensuring thorough coding for complex cardiac conditions beyond ischemic heart disease.
Questions About This Page
How many codes are in the I30-I5A range?
The I30-I5A range contains 176 ICD-10-CM diagnosis codes in FY 2026. 140 of them are billable, and the rest are category headers that organize the section.
What conditions does I30-I5A cover?
The range covers other forms of heart disease. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
