I24.0
BillableAcute coronary thrombosis not resulting in myocardial infarction
HCC Category Mapping
V28HCC 229 — Unstable Angina and Other Acute Ischemic Heart Disease
0.000V24HCC 87 — Unstable Angina and Other Acute Ischemic Heart Disease
0.274ESRDHCC 87 — Unstable Angina and Other Acute Ischemic Heart Disease
0.000RxHCCHCC 188 — Coronary Artery Disease and Angina
0.000What This Code Means
A blood clot in a coronary artery that does not result in a heart attack.
Coding Tips
- •Distinguish this from I21 codes (actual MI); confirm that myocardial necrosis did not occur
- •This represents thrombosis without infarction, so troponin levels and EKG changes should support this distinction
Clinical Significance
Acute coronary thrombosis not resulting in myocardial infarction represents a significant acute coronary event where a blood clot forms in a coronary artery but does not cause myocardial necrosis. This may be due to spontaneous thrombolysis, collateral circulation, or timely intervention. This condition still indicates high-risk coronary disease and typically warrants aggressive management including anticoagulation and possible revascularization.
Documentation Requirements
- ✓Documentation of acute coronary thrombosis
- ✓Confirmation that myocardial infarction did NOT occur (normal or non-diagnostic troponin levels)
- ✓Angiographic or imaging evidence of coronary thrombus
- ✓Clinical presentation and symptoms
- ✓Treatment approach (anticoagulation, percutaneous coronary intervention)
- ✓Follow-up troponin levels confirming no myocardial necrosis
Excludes 1 — Do NOT code together
- atherosclerotic heart disease (I25.1-)
Commonly Confused Codes
I21.01-I21.4 — Acute myocardial infarction codes: these require evidence of myocardial necrosisI20.0 — Unstable angina: ischemia without thrombosis being specifically documentedI24.9 — Acute ischemic heart disease, unspecified: less specificI25.82 — Chronic total occlusion of coronary artery: chronic condition, not acute
Code Hierarchy
└I24Other acute ischemic heart diseases└I24.0Acute coronary thrombosis not resulting in myocardial infarction
└I24.0Acute coronary thrombosis not resulting in myocardial infarction