I43
✓ Billable
Cardiomyopathy in diseases classified elsewhere
ICD-10-CM · FY2026 · Diseases of the Circulatory System
Code
I43
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.
Official coding notes
From CMS's ICD-10-CM Tabular List.
Excludes1 — never code together
- cardiomyopathy (in):
- coxsackie (virus) (B33.24)
- diphtheria (A36.81)
- sarcoidosis (D86.85)
- tuberculosis (A18.84)
Code first
- underlying disease, such as:
- amyloidosis (E85.-)
- glycogen storage disease (E74.0-)
- gout (M10.0-)
- thyrotoxicosis (E05.0-E05.9-)
Frequently asked questions
What is ICD-10 code I43?
ICD-10-CM code I43 represents Cardiomyopathy in diseases classified elsewhere. It is a billable diagnosis code in the Diseases of the Circulatory System chapter, effective October 1, 2025 – September 30, 2026.
Is I43 billable?
Yes. I43 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is I43 in?
I43 belongs to the Diseases of the Circulatory System chapter (I00–I99) of ICD-10-CM.
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