I20-I25 ICD-10-CA block: Ischaemic heart diseases
I20-I25 isn’t a code on its own. Choose one of the 45 codes beneath it, the one the documentation supports.
Official description
I20-I25Ischaemic heart diseases (I20-I25)
ICD-10-CA · Canada
Codes in I20-I25
I20-I25 isn’t a code on its own. Open the group that matches what the note documents.
Notes for I20-I25
As CIHI prints them, with any note I20-I25 takes from the headings above it.
Includes
- With mention of hypertension (I10-I15)
Use additional code
Add a code for this detail when the note documents it.
- Use additional code to identify presence of hypertension.
Excludes
Conditions classified elsewhere.
- 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.
Where I20-I25 sits
- 1ChapterChapter 9: Diseases of the circulatory system (I00-I99)
- 2Block I20-I25Ischaemic heart diseases
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 I20-I25 a valid ICD-10-CA code?
No. I20-I25 (Ischaemic heart diseases) is a block heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 45 codes; record the one the documentation supports.
Where is I20-I25 in ICD-10-CA?
I20-I25 sits under Chapter 9: Diseases of the circulatory system (I00-I99).
What coding notes apply to I20-I25?
ICD-10-CA lists Note, Includes, Use additional code, Excludes notes for I20-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.
Codes beside I20-I25
I00-I02Acute rheumatic feverI05-I09Chronic rheumatic heart diseasesI10-I15Hypertensive diseasesI26-I28Pulmonary heart disease and diseases of pulmonary circulationI30-I52Other forms of heart diseaseI60-I69Cerebrovascular diseasesI70-I79Diseases of arteries, arterioles and capillariesI80-I89Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classifiedI95-I99Other and unspecified disorders of the circulatory system