I51 ICD-10-CA category: Complications and ill-defined descriptions of heart disease

I51 isn’t a code on its own. Choose one of the 10 codes beneath it, the one the documentation supports.

Official description

I51

Complications and ill-defined descriptions of heart disease

ICD-10-CA · Canada

Codes in I51

I51 isn’t a code on its own. Open the code that matches what the note documents.

I51.0Cardiac septal defect, acquired I51.1Rupture of chordae tendineae, not elsewhere classified I51.2Rupture of papillary muscle, not elsewhere classified I51.3Intracardiac thrombosis, not elsewhere classified I51.4Myocarditis, unspecified I51.5Myocardial degeneration I51.6Cardiovascular disease, unspecified I51.7Cardiomegaly I51.8Other ill-defined heart diseases I51.9Heart disease, unspecified

Notes for I51

As CIHI prints them, with any note I51 takes from the headings above it.

Excludes

Conditions classified elsewhere.

Any condition in I51.4 - I51.9 due to hypertension (I11):• with renal disease (I13)complications following acute myocardial infarction (I23.-)when specified as rheumatic (I00-I09)
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 I51 sits

1ChapterChapter 9: Diseases of the circulatory system (I00-I99)
2Block I30-I52Other forms of heart disease
3Category I51Complications and ill-defined descriptions of heart disease

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 I51 in the CIHI source

Frequently asked questions

Is I51 a valid ICD-10-CA code?

No. I51 (Complications and ill-defined descriptions of heart disease) 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 I51 in ICD-10-CA?

I51 sits under I30-I52 Other forms of heart disease, within Chapter 9: Diseases of the circulatory system (I00-I99).

What coding notes apply to I51?

ICD-10-CA lists Excludes notes for I51, 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.