MedCodeSearch
ICD-10-CM Current in FY 2027

I21.A9

Other myocardial infarction type

Release
FY 2027
Effective
Official source (opens in a new tab)

Hierarchy

Where I21.A9 sits in the official hierarchy. Each level is the code it is classified under.

  1. I21 Acute myocardial infarction
  2. I21.A Parent Other type of myocardial infarction
  3. I21.A9 This code Other myocardial infarction type

Official Coding Notes

Reproduced verbatim from the FY 2027 ICD-10-CM files. Notes labelled as inherited are declared on a parent code and apply here too.

Includes

cardiac infarction

Inherited from I21 — Acute myocardial infarction

Includes

coronary (artery) embolism

Inherited from I21 — Acute myocardial infarction

Includes

coronary (artery) occlusion

Inherited from I21 — Acute myocardial infarction

Includes

coronary (artery) rupture

Inherited from I21 — Acute myocardial infarction

Includes

coronary (artery) thrombosis

Inherited from I21 — Acute myocardial infarction

Includes

infarction of heart, myocardium, or ventricle

Inherited from I21 — Acute myocardial infarction

Includes

myocardial infarction specified as acute or with a stated duration of 4 weeks (28 days) or less from onset

Inherited from I21 — Acute myocardial infarction

Inclusion Terms

Myocardial infarction associated with revascularization procedure

Inclusion Terms

Myocardial infarction type 3

Inclusion Terms

Myocardial infarction type 4a

Inclusion Terms

Myocardial infarction type 4b

Inclusion Terms

Myocardial infarction type 4c

Inclusion Terms

Myocardial infarction type 5

Excludes2

old myocardial infarction ( I25.2 )

Inherited from I21 — Acute myocardial infarction

Excludes2

postmyocardial infarction syndrome ( I24.1 )

Inherited from I21 — Acute myocardial infarction

Excludes2

subsequent type 1 myocardial infarction ( I22 .-)

Inherited from I21 — Acute myocardial infarction

Code First

, if applicable, postprocedural myocardial infarction following cardiac surgery ( I97.190 ), or postprocedural myocardial infarction during cardiac surgery ( I97.790 )

Use Additional Code

code, if applicable, to identify:

Inherited from I21 — Acute myocardial infarction

Use Additional Code

exposure to environmental tobacco smoke ( Z77.22 )

Inherited from I21 — Acute myocardial infarction

Use Additional Code

history of tobacco dependence ( Z87.891 )

Inherited from I21 — Acute myocardial infarction

Use Additional Code

occupational exposure to environmental tobacco smoke ( Z57.31 )

Inherited from I21 — Acute myocardial infarction

Use Additional Code

status post administration of tPA (rtPA) in a different facility within the last 24 hours prior to admission to current facility ( Z92.82 )

Inherited from I21 — Acute myocardial infarction

Use Additional Code

tobacco dependence ( F17 .-)

Inherited from I21 — Acute myocardial infarction

Use Additional Code

tobacco use ( Z72.0 )

Inherited from I21 — Acute myocardial infarction

Code Also

complication, if known and applicable, such as:

Code Also

(acute) stent occlusion ( T82.897- )

Code Also

(acute) stent stenosis ( T82.855- )

Code Also

(acute) stent thrombosis ( T82.867- )

Code Also

cardiac arrest due to underlying cardiac condition ( I46.2 )

Code Also

complication of percutaneous coronary intervention (PCI) ( I97.89 )

Code Also

occlusion of coronary artery bypass graft ( T82.218- )

Version History

How I21.A9 appears in each release imported from the official files, newest first.

  1. FY 2027 Effective

    Current

    Other myocardial infarction type

  2. FY 2026 Effective

    Unchanged

    Other myocardial infarction type

Related Codes

Other codes under I21.A

Codes whose official notes reference I21.A9

Data Source

Code information on this page is derived from the FY 2027 ICD-10-CM files published by CDC NCHS and CMS.

Release
FY 2027
Effective
Source file
icd10cm-code-descriptions-2027.zip

Official ICD-10-CM source files (opens in a new tab)

MedCodeSearch is an independent reference service and is not affiliated with CMS, CDC, or the U.S. government.

Look up another code

Search ICD-10-CM, ICD-10-PCS and HCPCS Level II by code or description.