I42.4
✓ Billable
Endocardial fibroelastosis
ICD-10-CM · FY2026 · Diseases of the Circulatory System
Code
I42.4
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Diseases of the Circulatory System
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code I42.4?
ICD-10-CM code I42.4 represents Endocardial fibroelastosis. It is a billable diagnosis code in the Diseases of the Circulatory System chapter, effective October 1, 2025 – September 30, 2026.
Is I42.4 billable?
Yes. I42.4 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is I42.4 in?
I42.4 belongs to the Diseases of the Circulatory System chapter (I00–I99) of ICD-10-CM.
Related codes in the I42 category
I42
Cardiomyopathy
Non-billable
I42.0
Dilated cardiomyopathy
Billable
I42.1
Obstructive hypertrophic cardiomyopathy
Billable
I42.2
Other hypertrophic cardiomyopathy
Billable
I42.3
Endomyocardial (eosinophilic) disease
Billable
I42.5
Other restrictive cardiomyopathy
Billable
I42.6
Alcoholic cardiomyopathy
Billable
I42.7
Cardiomyopathy due to drug and external agent
Billable
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