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ICD-10 Guide
ICD-10 CodesI24.81

I24.81

Billable

Acute coronary microvascular dysfunction

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

Code Description

ICD-10 I24.81 is a billable code used to indicate a diagnosis of acute coronary microvascular dysfunction.

Key Diagnostic Point:

Acute coronary microvascular dysfunction (CMD) is a condition characterized by impaired function of the small blood vessels in the heart, leading to inadequate blood flow and oxygen delivery to the myocardium despite normal coronary artery anatomy. Clinically, patients may present with chest pain, shortness of breath, and fatigue, often without the typical signs of obstructive coronary artery disease. The anatomy involved includes the coronary microvasculature, which plays a crucial role in regulating myocardial blood flow. Disease progression can vary; some patients may experience recurrent episodes of angina, while others may develop heart failure or other complications over time. Diagnostic considerations include the use of advanced imaging techniques such as cardiac MRI, PET scans, and invasive coronary function tests to assess microvascular function. The diagnosis is often challenging due to the absence of significant findings on standard coronary angiography, necessitating a high index of suspicion and thorough evaluation of symptoms and risk factors.

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

Internal 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 ICD-10 Codes

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

Acute coronary microvascular dysfunction significantly impacts clinical outcomes, as it can lead to persistent symptoms and decreased quality of life. Understanding this condition is crucial for improving population health, as it is often underdiagnosed and can contribute to increased healthcare utilization. Quality measures should focus on timely diagnosis and appropriate management strategies to enhance patient care and reduce hospitalizations related to heart failure and other complications.

ICD-9 vs ICD-10

Acute coronary microvascular dysfunction significantly impacts clinical outcomes, as it can lead to persistent symptoms and decreased quality of life. Understanding this condition is crucial for improving population health, as it is often underdiagnosed and can contribute to increased healthcare utilization. Quality measures should focus on timely diagnosis and appropriate management strategies to enhance patient care and reduce hospitalizations related to heart failure and other complications.

Reimbursement & Billing Impact

Reimbursement considerations include ensuring that the medical necessity for tests and treatments is well-documented. Common denials may arise from insufficient documentation of symptoms or failure to demonstrate the need for advanced imaging. Best practices include maintaining thorough records of patient interactions, test results, and treatment plans to support claims and reduce the risk of audits.

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 I24.81?

I24.81 specifically covers acute coronary microvascular dysfunction, which may include conditions such as microvascular angina and other forms of ischemic heart disease that do not involve significant coronary artery obstruction.

When should I24.81 be used instead of related codes?

I24.81 should be used when there is evidence of acute coronary microvascular dysfunction without significant obstructive coronary artery disease, particularly when patients present with symptoms of angina and normal coronary angiography.

What documentation supports I24.81?

Documentation should include clinical symptoms, results from non-invasive tests, and any imaging studies that support the diagnosis of microvascular dysfunction. Detailed notes on patient history and risk factors are also essential.