I25 ICD-10-CA category: Chronic ischaemic heart disease
I25 isn’t a code on its own. Choose one of the 15 codes beneath it, the one the documentation supports.
Official description
I25Chronic ischaemic heart disease
ICD-10-CA · Canada
Codes in I25
I25 isn’t a code on its own. Open the group that matches what the note documents.
I25.0Atherosclerotic cardiovascular disease, so describedI25.1Atherosclerotic heart disease (7 codes)I25.2Old myocardial infarctionI25.3Aneurysm of heartI25.4Coronary artery aneurysm and dissectionI25.5Ischaemic cardiomyopathyI25.6Silent myocardial ischaemiaI25.8Other forms of chronic ischaemic heart diseaseI25.9Chronic ischaemic heart disease, unspecifiedNotes for I25
As CIHI prints them, with any note I25 takes from the headings above it.
Includes
- With mention of hypertension (I10-I15)From I20-I25 Ischaemic heart diseases
Use additional code
Add a code for this detail when the note documents it.
- Use additional code from category (E10-E14) with fourth and fifth characters .52 to classify any associated diabetes mellitus.
- Use additional code to identify presence of hypertension.From I20-I25 Ischaemic heart diseases
Excludes
Conditions classified elsewhere.
- Cardiovascular disease NOS (I51.6)
- 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)
Note
- For morbidity, duration as used in categories (I21, I22, I24 and I25) refers to the interval elapsing between onset of the ischaemic episode and admission to care.From I20-I25 Ischaemic heart diseases
Where I25 sits
- 1ChapterChapter 9: Diseases of the circulatory system (I00-I99)
- 2Block I20-I25Ischaemic heart diseases
- 3Category I25Chronic ischaemic 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.
Frequently asked questions
Is I25 a valid ICD-10-CA code?
No. I25 (Chronic ischaemic heart disease) is a category heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 15 codes; record the one the documentation supports.
Where is I25 in ICD-10-CA?
I25 sits under I20-I25 Ischaemic heart diseases, within Chapter 9: Diseases of the circulatory system (I00-I99).
What coding notes apply to I25?
ICD-10-CA lists Use additional code, Excludes, Note, Includes notes for I25, 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.