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I43 ICD-10-CM Code: Cardiomyopathy in diseases classified elsewhere

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Official description

I43

Cardiomyopathy in diseases classified elsewhere

ICD-10-CM diagnosis code · United States clinical modification

Where I43 sits

  1. 1

    Chapter 9

    Diseases of the circulatory system (I00-I99)

  2. 2

    Section

    Other forms of heart disease (I30-I5A)

  3. 3

    Category I43

    Cardiomyopathy in diseases classified elsewhere

  4. 4

    Code I43

    Cardiomyopathy in diseases classified elsewhere

Notes for this code

Inclusion terms

No inclusion terms are listed for I43.

Code first

  • underlying disease, such as:
  • amyloidosis (E85.-)
  • glycogen storage disease (E74.0-)
  • gout (M10.0-)
  • thyrotoxicosis (E05.0-E05.9-)

Use additional code

No “use additional code” instruction is listed for I43.

Excludes1

Conditions that should not be reported together with this code.

  • cardiomyopathy (in):
  • coxsackie (virus) (B33.24)
  • diphtheria (A36.81)
  • sarcoidosis (D86.85)
  • tuberculosis (A18.84)

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for I43.

Source and release

Data release
U.S. ICD-10-CM · FY 2027
Effective date
Oct 1, 2026

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Frequently asked questions

What does ICD-10-CM code I43 mean?

I43 is the FY 2027 U.S. ICD-10-CM code for “Cardiomyopathy in diseases classified elsewhere.”

Is I43 a billable or specific ICD-10-CM code?

Yes. In the FY 2027 reference data used on this page, I43 has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.

Where is I43 located in ICD-10-CM?

I43 is listed in Chapter 9, Diseases of the circulatory system (I00-I99), within Other forms of heart disease (I30-I5A) (I30–I5A), under category I43, Cardiomyopathy in diseases classified elsewhere.

What coding notes are listed for I43?

No inclusion terms are listed for I43 in this reference record. Code-first instructions: underlying disease, such as:; amyloidosis (E85.-); glycogen storage disease (E74.0-); gout (M10.0-); thyrotoxicosis (E05.0-E05.9-). Excludes1 notes: cardiomyopathy (in):; coxsackie (virus) (B33.24); diphtheria (A36.81); sarcoidosis (D86.85); tuberculosis (A18.84). No Excludes2 note is listed.