What is the ICD-10 code for coronary syndrome?

The ICD-10 code for unspecified acute coronary syndrome is I24.9, but specific types like STEMI and NSTEMI have their own codes such as I21.01 for STEMI involving the LAD.

How do you code a STEMI in ICD-10?

For a STEMI involving the left anterior descending artery, use ICD-10 code I21.01, ensuring documentation includes ECG and troponin results.

ICD-10 Coding for Coronary Syndrome(I21.01, I21.0, I21.4)

Save

Explore detailed ICD-10 coding guidelines for coronary syndrome, including STEMI and NSTEMI. Learn about documentation requirements and common coding pitfalls.

Also known as:

Acute Coronary SyndromeACSHeart Attack

Related ICD-10 Code Ranges

Complete code families applicable to Coronary Syndrome

I00-I99Primary Range

Diseases of the circulatory system

→

Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

Code	Description	When to Use	Key Documentation
I21.01	ST elevation (STEMI) myocardial infarction involving left anterior descending coronary artery	Use when STEMI is confirmed by ECG and troponin levels, specifically involving the LAD.	ST elevation ≥1 mm in 2 contiguous leads Troponin elevation
I24.9	Acute coronary syndrome, unspecified	Use when ACS is suspected but not yet confirmed as STEMI or NSTEMI.	Chest pain with unknown etiology Pending further diagnostic results

Primary ICD-10-CM Codes

ST elevation (STEMI) myocardial infarction involving left main coronary artery

I21.01Billable

Differential Codes

Alternative codes to consider when ruling out similar conditions

Non-ST elevation (NSTEMI) myocardial infarctionI21.4

Acute myocardial infarction, unspecifiedI21.9

Documentation & Coding Risks

Avoid these common issues when documenting Coronary Syndrome.

Coding unspecified ACS when specific MI type is known

Impact

Clinical: May lead to inappropriate treatment planning, Regulatory: Non-compliance with ICD-10 guidelines, Financial: Potential loss of reimbursement

Mitigation

Verify diagnostic results before coding, Use specific MI codes when confirmed

Using I24.9 when specific MI type is confirmed

Impact

Reimbursement: Potential underpayment due to unspecified coding, Compliance: Non-compliance with coding guidelines, Data Quality: Decreased accuracy in clinical data

Mitigation

Use specific codes like I21.01 for confirmed STEMI.

Unspecified MI coding

Impact

High risk of audit if MI type is not specified when diagnostic results are available.

Mitigation

Ensure all diagnostic tests are reviewed and documented before final coding.

Frequently Asked Questions

Documentation requirements, coding pitfalls and FAQs for conditions coded with I21.01.

Primary Code

I21.01

ST elevation (STEMI) myocardial infarction involving left main coronary artery

Quick Navigation

ICD-10 codes5

Coding risks3

FAQs2

ICD-10 Coding for Coronary Syndrome(I21.01, I21.0, I21.4)

Documentation & Coding Risks

Frequently Asked Questions

What is the ICD-10 code for coronary syndrome?

How do you code a STEMI in ICD-10?

Related condition guides