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I23.8 ICD-10-CA subcategory: Other current complications following acute myocardial infarction

I23.8 isn’t a code on its own. Choose one of the 4 codes beneath it, the one the documentation supports.

Official description

I23.8

Other current complications following acute myocardial infarction

ICD-10-CA · Canada · Also written I238

Codes in I23.8

I23.8 isn’t a code on its own. Open the code that matches what the note documents.

I23.80Papillary muscle dysfunction as current complication following acute myocardial infarctionI23.81Pericarditis as current complication following acute myocardial infarctionI23.82Postmyocardial infarction angina as current complication following acute myocardial infarctionI23.88Other current complications following acute myocardial infarction

Notes for I23.8

As CIHI prints them, with any note I23.8 takes from the headings above it.

Includes

Use additional code

Add a code for this detail when the note documents it.

Excludes

Conditions classified elsewhere.

  • The listed conditions, when:• concurrent with acute myocardial infarction (I21-I22)• not specified as current complications following acute myocardial infarction (I31.-)(I51.-)From I23 Certain current complications following acute myocardial infarction
  • 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 I23.8 sits

  1. 1ChapterChapter 9: Diseases of the circulatory system (I00-I99)
  2. 2Block I20-I25Ischaemic heart diseases
  3. 3Category I23Certain current complications following acute myocardial infarction
  4. 4Subcategory I23.8Other current complications following acute myocardial infarction

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 I23.8 in the CIHI source

Frequently asked questions

Is I23.8 a valid ICD-10-CA code?

No. I23.8 (Other current complications following acute myocardial infarction) is a subcategory heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 4 codes; record the one the documentation supports.

Where is I23.8 in ICD-10-CA?

I23.8 sits under I23 Certain current complications following acute myocardial infarction, within I20-I25 Ischaemic heart diseases, within Chapter 9: Diseases of the circulatory system (I00-I99).

What coding notes apply to I23.8?

ICD-10-CA lists Excludes, Note, Includes, Use additional code notes for I23.8, 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 I23.8

I23.0Haemopericardium as current complication following acute myocardial infarctionI23.1Atrial septal defect as current complication following acute myocardial infarctionI23.2Ventricular septal defect as current complication following acute myocardial infarctionI23.3Rupture of cardiac wall without haemopericardium as current complication following acute myocardial infarctionI23.4Rupture of chordae tendineae as current complication following acute myocardial infarctionI23.5Rupture of papillary muscle as current complication following acute myocardial infarctionI23.6Thrombosis of atrium, auricular appendage, and ventricle as current complications following acute myocardial infarction