I42 ICD-10-CA category: Cardiomyopathy

I42 isn’t a code on its own. Choose one of the 10 codes beneath it, the one the documentation supports.

Official description

I42

Cardiomyopathy

ICD-10-CA · Canada

Codes in I42

I42 isn’t a code on its own. Open the code that matches what the note documents.

I42.0Dilated cardiomyopathy I42.1Obstructive hypertrophic cardiomyopathy I42.2Other hypertrophic cardiomyopathy I42.3Endomyocardial (eosinophilic) disease I42.4Endocardial fibroelastosis I42.5Other restrictive cardiomyopathy I42.6Alcoholic cardiomyopathy I42.7Cardiomyopathy due to drugs and other external agents I42.8Other cardiomyopathies I42.9Cardiomyopathy, unspecified

Notes for I42

As CIHI prints them, with any note I42 takes from the headings above it.

Excludes

Conditions classified elsewhere.

Cardiomyopathy complicating:• pregnancy (O99.4)• puerperium (O90.3)ischaemic cardiomyopathy (I25.5)
Certain:• conditions originating in the perinatal period (P00-P96)• infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)systemic connective tissue disorders (M30-M36)transient cerebral ischaemic attacks and related syndromes (G45.-)From Chapter 9: Diseases of the circulatory system (I00-I99)

Where I42 sits

1ChapterChapter 9: Diseases of the circulatory system (I00-I99)
2Block I30-I52Other forms of heart disease
3Category I42Cardiomyopathy

Source and release

Data release: ICD-10-CA · FY 2026–2027
Effective date: Apr 1, 2026
Publisher: CIHI

This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.

See I42 in the CIHI source

Frequently asked questions

Is I42 a valid ICD-10-CA code?

No. I42 (Cardiomyopathy) is a category heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 10 codes; record the one the documentation supports.

Where is I42 in ICD-10-CA?

I42 sits under I30-I52 Other forms of heart disease, within Chapter 9: Diseases of the circulatory system (I00-I99).

What coding notes apply to I42?

ICD-10-CA lists Excludes notes for I42, including those from the headings it sits under. They are listed on this page with where each one comes from.

Which ICD-10-CA release does this page use?

It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.

View I30-I52