I21.29
BillableSTEMI involving oth sites
ST elevation (STEMI) myocardial infarction involving other sites
Coding Notes
Inclusion Terms
Alternative clinical terms for this condition
- Acute transmural myocardial infarction of other sites
- Apical-lateral transmural (Q wave) infarction (acute)
- Basal-lateral transmural (Q wave) infarction (acute)
- High lateral transmural (Q wave) infarction (acute)
- Lateral (wall) NOS transmural (Q wave) infarction (acute)
- Posterior (true) transmural (Q wave) infarction (acute)
- Posterobasal transmural (Q wave) infarction (acute)
- Posterolateral transmural (Q wave) infarction (acute)
- Posteroseptal transmural (Q wave) infarction (acute)
- Septal transmural (Q wave) infarction (acute) NOS
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
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
Related Codes(1)
Also Known As / Clinical Terms(62)
SNOMED CT
- Acute myocardial infarction of posterolateral wall15990001
- Acute myocardial infarction of basal inferior segment of left ventricle70998009
- Acute myocardial infarction of posterobasal wall70998009
- Acute myocardial infarction of septum79009004
- Acute myocardial infarction of septum alone79009004
- Acute septal infarction79009004
- Acute Q wave infarction - lateral233833005
- Acute posterior myocardial infarction233838001
- Acute Q wave myocardial infarction304914007
- Acute Q-wave infarct304914007
- Acute ST segment elevation myocardial infarction of anterior wall703164000
- Acute STEMI (ST elevation myocardial infarction) of anterior wall703164000
- Acute anterior ST segment elevation myocardial infarction703164000
- Acute ST segment elevation myocardial infarction due to occlusion of intermediate artery846683001
- Acute STEMI (ST elevation myocardial infarction) due to occlusion of ramus intermedius artery846683001
- Acute ST segment elevation myocardial infarction of lateral wall15712921000119103
- Acute ST segment elevation myocardial infarction of posterior wall15713041000119103
- Acute ST segment elevation myocardial infarction of posterobasal wall15713201000119105
- Acute ST segment elevation myocardial infarction of posterolateral wall15712841000119100
- Acute ST segment elevation myocardial infarction of septum15713161000119100
UMLS
- Acute transmural myocardial infarction of other sitesC0494579
- Apical-lateral transmural (Q wave) infarction (acute)C2882109
- Basal-lateral transmural (Q wave) infarction (acute)C2882110
- High lateral transmural (Q wave) infarction (acute)C2882111
- Lateral (wall) NOS transmural (Q wave) infarction (acute)C2882112
- Posterior (true) transmural (Q wave) infarction (acute)C2882113
- Posterobasal transmural (Q wave) infarction (acute)C2882114
- Posterolateral transmural (Q wave) infarction (acute)C2882115
- Posteroseptal transmural (Q wave) infarction (acute)C2882116
- ST elevation (STEMI) myocardial infarction involving other sitesC2882118
- STEMI involving oth sitesC2882118
- Septal transmural (Q wave) infarction (acute) NOSC2882117
Clinical Terms
- Acute myocardial infarction of posterobasal wall
- Acute ST segment elevation myocardial infarction of posterior wall
- Acute ST segment elevation myocardial infarction of posterolateral wall
- Acute myocardial infarction of septum alone
- Acute myocardial infarction of septum
- Acute STEMI (ST elevation myocardial infarction) of anterior wall
- Acute Q wave infarction - lateral
- Acute septal infarction
- Acute transmural myocardial infarction of other sites
- Acute posterior myocardial infarction
- Lateral (wall) NOS transmural (Q wave) infarction (acute)
- Posterolateral transmural (Q wave) infarction (acute)
- Acute myocardial infarction of basal inferior segment of left ventricle
- Acute STEMI (ST elevation myocardial infarction) due to occlusion of ramus intermedius artery
- Basal-lateral transmural (Q wave) infarction (acute)
- High lateral transmural (Q wave) infarction (acute)
- Septal transmural (Q wave) infarction (acute) NOS
- Posteroseptal transmural (Q wave) infarction (acute)
- Acute ST segment elevation myocardial infarction of lateral wall
- Posterobasal transmural (Q wave) infarction (acute)
- Acute ST segment elevation myocardial infarction of septum
- Acute Q wave myocardial infarction
- Acute myocardial infarction of posterolateral wall
- Apical-lateral transmural (Q wave) infarction (acute)
- Acute anterior ST segment elevation myocardial infarction
- Acute ST segment elevation myocardial infarction of anterior wall
- Posterior (true) transmural (Q wave) infarction (acute)
- Acute ST segment elevation myocardial infarction of posterobasal wall
- Acute Q-wave infarct
- Acute ST segment elevation myocardial infarction due to occlusion of intermediate artery
Frequently Asked Questions
What is the ICD-10 code for stemi involving oth sites?
The ICD-10-CM code for stemi involving oth sites is I21.29. The full clinical description is "ST elevation (STEMI) myocardial infarction involving other sites". I21.29 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code I21.29 mean?
ICD-10-CM code I21.29 represents “ST elevation (STEMI) myocardial infarction involving other sites”. 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 I21.29 a billable code?
Yes, I21.29 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is I21.29 in?
I21.29 is in Chapter 9: Diseases of the Circulatory System (codes I00-I99).
Are additional codes required with I21.29?
Yes, when using I21.29, 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 I21.29 map to?
I21.29 maps to 13 SNOMED CT concepts: 233833005, 304914007, 846683001, 703164000, 15712921000119103, and 8 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for I21.29?
I21.29 is linked to 11 UMLS Concept Unique Identifiers: C0494579, C2882109, C2882110, C2882111, C2882112, and 6 more. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does I21.29 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like stemi involving oth sites 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 I21.29?
There is no direct ICD-11 mapping available for I21.29 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.
Automate ICD-10 Coding With AI
Send clinical text to the AutoICD API and get back structured ICD-10 codes with confidence scores. Integrates into any EHR or billing system in minutes.
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.