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ICD-10 Guide
ICD-10 CodesChapter 9: Diseases of the circulatory systemI22

I22

Non-billable

Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction

Chapter 9:Diseases of the circulatory system

BILLABLE STATUSNo
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/06/2025

Code Description

ICD-10 I22 is a used to indicate a diagnosis of subsequent st elevation (stemi) and non-st elevation (nstemi) myocardial infarction.

Key Diagnostic Point:

I22 codes are used to classify subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarctions, which are critical cardiovascular events characterized by the interruption of blood supply to the heart muscle. The clinical presentation often includes chest pain, shortness of breath, and other symptoms indicative of acute coronary syndrome. The anatomy involved primarily includes the coronary arteries, which supply blood to the heart. Disease progression can lead to complications such as heart failure, arrhythmias, or even sudden cardiac death if not managed promptly. Diagnostic considerations for I22 include a thorough patient history, physical examination, and diagnostic tests such as ECG, cardiac biomarkers, and imaging studies to confirm the diagnosis and assess the extent of myocardial damage. Accurate coding is essential for appropriate treatment planning and reimbursement, as well as for tracking the incidence and outcomes of myocardial infarctions in the population.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Diagnostic complexity
  • Treatment complexity
  • Documentation requirements
  • Coding specificity

Audit Risk Factors

  • Common coding errors
  • Documentation gaps
  • Billing challenges

Specialty Focus

Medical Specialties

Cardiology

Documentation Requirements

Standard ICD-10-CM documentation requirements apply

Common Clinical Scenarios

Various clinical presentations within this specialty area

Billing Considerations

Follow specialty-specific billing guidelines

Emergency Medicine

Documentation Requirements

Standard ICD-10-CM documentation requirements apply

Common Clinical Scenarios

Various clinical presentations within this specialty area

Billing Considerations

Follow specialty-specific billing guidelines

Related CPT Codes

CPT Code

Clinical Scenario

Documentation Requirements

CPT Code

Clinical Scenario

Documentation Requirements

CPT Code

Clinical Scenario

Documentation Requirements

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The clinical significance of I22 lies in its association with increased morbidity and mortality in patients with cardiovascular disease. Understanding the prevalence of subsequent myocardial infarctions can inform population health strategies and improve quality measures. Effective management of these conditions can lead to reduced healthcare utilization and better patient outcomes, highlighting the importance of accurate coding and documentation in tracking and addressing cardiovascular health issues.

ICD-9 vs ICD-10

The clinical significance of I22 lies in its association with increased morbidity and mortality in patients with cardiovascular disease. Understanding the prevalence of subsequent myocardial infarctions can inform population health strategies and improve quality measures. Effective management of these conditions can lead to reduced healthcare utilization and better patient outcomes, highlighting the importance of accurate coding and documentation in tracking and addressing cardiovascular health issues.

Reimbursement & Billing Impact

The clinical significance of I22 lies in its association with increased morbidity and mortality in patients with cardiovascular disease. Understanding the prevalence of subsequent myocardial infarctions can inform population health strategies and improve quality measures. Effective management of these conditions can lead to reduced healthcare utilization and better patient outcomes, highlighting the importance of accurate coding and documentation in tracking and addressing cardiovascular health issues.

Resources

Clinical References

  • •
    ICD-10 Official Guidelines for I00-I99
  • •
    Clinical Documentation Requirements

Coding & Billing References

  • •
    ICD-10 Official Guidelines for I00-I99
  • •
    Clinical Documentation Requirements

Frequently Asked Questions

What specific conditions are covered by I22?

I22 codes cover subsequent myocardial infarctions that occur after an initial event, including both STEMI and NSTEMI types. These codes are used when a patient has a new myocardial infarction following a previous one, indicating the need for careful monitoring and management.

When should I22 be used instead of related codes?

I22 should be used when a patient presents with a subsequent myocardial infarction after an initial event has been documented. It is crucial to differentiate between initial and subsequent events to ensure accurate coding and appropriate treatment.

What documentation supports I22?

Documentation for I22 should include a detailed patient history, evidence of previous myocardial infarction, current clinical findings, and results from diagnostic tests that confirm the occurrence of a subsequent myocardial infarction.