I21.A9
BillableOther myocardial infarction type
Other myocardial infarction type
Coding Notes
Inclusion Terms
Alternative clinical terms for this condition
- Myocardial infarction associated with revascularization procedure
- Myocardial infarction type 3
- Myocardial infarction type 4a
- Myocardial infarction type 4b
- Myocardial infarction type 4c
- Myocardial infarction type 5
Includes
Conditions included under this code
- cardiac infarction
- coronary (artery) embolism
- coronary (artery) occlusion
- coronary (artery) rupture
- coronary (artery) thrombosis
- infarction of heart, myocardium, or ventricle
- myocardial infarction specified as acute or with a stated duration of 4 weeks (28 days) or less from onset
Excludes 2
Conditions not included here, but the patient may have both
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations, and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
- •systemic connective tissue disordersM30-M36
- •transient cerebral ischemic attacks and related syndromesG45
- •old myocardial infarctionI25.2
- •postmyocardial infarction syndromeI24.1
- •subsequent type 1 myocardial infarctionI22
Code First
The underlying condition must be sequenced before this code
Use Additional Code
Additional codes that should follow this code
- code, if applicable, to identify:
- •exposure to environmental tobacco smokeZ77.22
- •history of tobacco dependenceZ87.891
- •occupational exposure to environmental tobacco smokeZ57.31
- •status post administration of tPA (rtPA) in a different facility within the last 24 hours prior to admission to current facilityZ92.82
- •tobacco dependenceF17
- •tobacco useZ72.0
Code Also
A second code may be required; sequencing depends on circumstances
- •the presence of hypertensionI1A)I10
- complication, if known and applicable, such as:
- •(acute) stent occlusionT82.897
- •(acute) stent stenosisT82.855
- •(acute) stent thrombosisT82.867
- •cardiac arrest due to underlying cardiac conditionI46.2
- •complication of percutaneous coronary intervention (PCI)I97.89
- •occlusion of coronary artery bypass graftT82.218
Related Codes(1)
Also Known As / Clinical Terms(40)
SNOMED CT
UMLS
- Joint ESC/ACCF/AHA/WHF Task Force Type 3 Myocardial InfarctionC3898656
- Joint Task Force Type 3 Myocardial InfarctionC3898656
- Myocardial infarction type 3C3898656
- Joint ESC/ACCF/AHA/WHF Task Force Type 4A Myocardial InfarctionC3898655
- Joint Task Force Type 4A Myocardial InfarctionC3898655
- Myocardial infarction type 4aC3898655
- Joint ESC/ACCF/AHA/WHF Task Force Type 4B Myocardial InfarctionC3898654
- Joint Task Force Type 4B Myocardial InfarctionC3898654
- Myocardial infarction type 4bC3898654
- Joint ESC/ACCF/AHA/WHF Task Force Type 4C Myocardial InfarctionC3898653
- Joint Task Force Type 4C Myocardial InfarctionC3898653
- Myocardial infarction type 4cC3898653
- Myocardial infarction associated with revascularization procedureC4509204
- Myocardial infarction type 5C5970206
- Type 5 myocardial infarctionC5970206
- Type 5 myocardial infarction (disorder)C5970206
- Other myocardial infarction typeC4509201
- Other type of myocardial infarctionC4509201
Clinical Terms
- Myocardial infarction type 3
- Postoperative myocardial infarction
- Right ventricular failure due to right ventricular infarction
- Other type of myocardial infarction
- Joint ESC/ACCF/AHA/WHF Task Force Type 3 Myocardial Infarction
- Myocardial infarction type 5
- Joint Task Force Type 4A Myocardial Infarction
- Joint ESC/ACCF/AHA/WHF Task Force Type 4A Myocardial Infarction
- Type 5 myocardial infarction (disorder)
- Myocardial infarction type 4b
- Joint Task Force Type 4C Myocardial Infarction
- Type 5 myocardial infarction
- Joint Task Force Type 3 Myocardial Infarction
- Myocardial infarction type 4c
- Joint ESC/ACCF/AHA/WHF Task Force Type 4B Myocardial Infarction
- Myocardial infarction associated with revascularization procedure
- Myocardial infarction type 4a
- Joint Task Force Type 4B Myocardial Infarction
- Joint ESC/ACCF/AHA/WHF Task Force Type 4C Myocardial Infarction
Frequently Asked Questions
What is the ICD-10 code for other myocardial infarction type?
The ICD-10-CM code for other myocardial infarction type is I21.A9. The full clinical description is "Other myocardial infarction type". I21.A9 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code I21.A9 mean?
ICD-10-CM code I21.A9 represents “Other myocardial infarction type”. It is classified under Chapter 9: Diseases of the Circulatory System and is a billable/specific code that can be used on a claim.
Is I21.A9 a billable code?
Yes, I21.A9 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is I21.A9 in?
I21.A9 is in Chapter 9: Diseases of the Circulatory System (codes I00-I99).
Are additional codes required with I21.A9?
Yes, when using I21.A9, also report: code, if applicable, to identify:; exposure to environmental tobacco smoke (Z77.22); history of tobacco dependence (Z87.891); occupational exposure to environmental tobacco smoke (Z57.31); status post administration of tPA (rtPA) in a different facility within the last 24 hours prior to admission to current facility (Z92.82); tobacco dependence (F17.-); tobacco use (Z72.0).
What SNOMED CT codes does I21.A9 map to?
I21.A9 maps to 3 SNOMED CT concepts: 129574000, 1208850004, 16837721000119105. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for I21.A9?
I21.A9 is linked to 7 UMLS Concept Unique Identifiers: C3898656, C3898655, C3898654, C3898653, C4509204, and 2 more. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does I21.A9 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like other myocardial infarction type affect a person's functioning: body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of I21.A9?
There is no direct ICD-11 mapping available for I21.A9 in the WHO crosswalk tables. This may mean the concept is classified differently in ICD-11. Use the ICD-10 to ICD-11 converter to search for related codes.
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.