ICD-10 Guide

Stemi

ICD-10 Coding for ST-Elevation Myocardial Infarction(I21.01, I21.02, I21.11)

PRIMARY SPECIALTYEmergency Medicine

COMPLEXITYHigh

LAST UPDATED09/15/2025

Sam Tuffun, PT, DPT

Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Stemi?

Essential facts and insights about ST-Elevation Myocardial Infarction

Key Clinical Considerations:

Chest pain or discomfort, often described as pressure or squeezing
Elevated troponin levels, ST-segment elevation on ECG
Diaphoresis, nausea, shortness of breath

Clinical Information

Clinical Criteria & Documentation Requirements

Patient history including risk factors and presenting symptoms
ECG findings and troponin test results
Treatment administered and response to treatment

Coding Guidelines

Usage Guidelines & Examples

Follow AHA/ACC guidelines for coding STEMI
Common errors include misclassifying STEMI as NSTEMI

Code Exclusions

Important Exclusions

Non-ST elevation myocardial infarction (NSTEMI)
Unstable angina
Other cardiac conditions

Specialty Focus

Primary Specialty

Emergency Medicine

Specialty Applications

Adults with risk factors for coronary artery disease
Emergency departments and urgent care settings

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

Comprehensive clinical documentation
Accurate code selection based on clinical criteria
Proper exclusion considerations
Specialty-specific coding guidelines

Documentation

Documentation Templates

Billing Information

Billing Considerations

Ensure proper documentation for billing
Verify code specificity requirements
Check for any additional codes needed
Review payer-specific guidelines

Common Issues

Insufficient clinical documentation
Incorrect code selection
Missing supporting diagnoses
Timing and frequency documentation

Frequently Asked Questions

Documentation requirements?

Document all clinical findings, ECG results, and treatment details.

Billing considerations?

Ensure accurate coding of the specific type of STEMI for appropriate reimbursement.

Stemi

Diagnosis Overview

Key Clinical Considerations:

Clinical Information

Clinical Criteria & Documentation Requirements

Coding Guidelines

Usage Guidelines & Examples

Code Exclusions

Important Exclusions

Related ICD-10 Codes

Related CPT Codes

Specialty Focus

Primary Specialty

Specialty Applications

Coding Complexity

Documentation

Documentation Templates

Billing Information

Billing Considerations

Common Issues

Frequently Asked Questions

Documentation requirements?

Billing considerations?

Stemi

Diagnosis Overview

Key Clinical Considerations:

Clinical Information

Clinical Criteria & Documentation Requirements

Coding Guidelines

Usage Guidelines & Examples

Code Exclusions

Important Exclusions

Related ICD-10 Codes

Related CPT Codes

Specialty Focus

Primary Specialty

Specialty Applications

Coding Complexity

Documentation

Documentation Templates

Billing Information

Billing Considerations

Common Issues

Frequently Asked Questions

Documentation requirements?

Billing considerations?