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ICD-10 Guide
ICD-10 CodesI25.82

I25.82

Billable

Chronic total occlusion of coronary artery

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

Code Description

ICD-10 I25.82 is a billable code used to indicate a diagnosis of chronic total occlusion of coronary artery.

Key Diagnostic Point:

Chronic total occlusion (CTO) of a coronary artery is a condition characterized by a complete blockage of a coronary artery for at least three months. This occlusion can lead to significant ischemia, as the affected area of the heart muscle does not receive adequate blood supply. Clinically, patients may present with stable angina, exertional dyspnea, or may be asymptomatic. The anatomy involved typically includes the major coronary arteries such as the left anterior descending artery, right coronary artery, or circumflex artery. Disease progression can vary; some patients may develop collateral circulation, which can partially compensate for the loss of blood flow, while others may experience worsening symptoms or acute coronary syndromes. Diagnostic considerations include coronary angiography, which is the gold standard for visualizing the occlusion, along with non-invasive tests such as stress testing or cardiac imaging. Understanding the extent and location of the occlusion is crucial for determining appropriate management strategies, which may include medical therapy, percutaneous coronary intervention (PCI), or coronary artery bypass grafting (CABG).

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Diagnostic complexity: Requires advanced imaging techniques for accurate diagnosis.
  • Treatment complexity: Management may involve multiple specialties and complex interventions.
  • Documentation requirements: Detailed documentation of symptoms, diagnostic tests, and treatment plans is essential.
  • Coding specificity: Requires precise coding to differentiate from other coronary artery diseases.

Audit Risk Factors

  • Common coding errors: Misclassification with other coronary artery disease codes.
  • Documentation gaps: Incomplete records regarding the duration and severity of symptoms.
  • Billing challenges: Potential denials due to lack of supporting documentation for the necessity of procedures.

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

Interventional Radiology

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

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

Chronic total occlusion of coronary arteries significantly impacts population health, contributing to increased morbidity and mortality associated with coronary artery disease. It is a leading cause of heart failure and can lead to higher healthcare utilization patterns due to the need for advanced interventions. Quality measures often focus on timely diagnosis and effective management of CTO to improve patient outcomes and reduce the burden on healthcare systems.

ICD-9 vs ICD-10

Chronic total occlusion of coronary arteries significantly impacts population health, contributing to increased morbidity and mortality associated with coronary artery disease. It is a leading cause of heart failure and can lead to higher healthcare utilization patterns due to the need for advanced interventions. Quality measures often focus on timely diagnosis and effective management of CTO to improve patient outcomes and reduce the burden on healthcare systems.

Reimbursement & Billing Impact

Reimbursement considerations include ensuring that the medical necessity for procedures such as PCI or CABG is clearly documented. Common denials may arise from insufficient documentation or failure to demonstrate the severity of the condition. Best practices include maintaining thorough clinical notes, ensuring all imaging studies are available, and clearly outlining the treatment rationale in the patient’s medical record.

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 I25.82?

I25.82 specifically covers chronic total occlusion of coronary arteries, which may arise from atherosclerosis, thrombosis, or other vascular diseases leading to complete blockage. It does not cover partial occlusions or acute coronary syndromes.

When should I25.82 be used instead of related codes?

I25.82 should be used when there is a confirmed diagnosis of chronic total occlusion, as evidenced by imaging studies. It should not be used for patients with stable angina due to non-occlusive disease or those with acute coronary syndromes.

What documentation supports I25.82?

Documentation must include clinical evidence of chronic symptoms, results from coronary angiography confirming total occlusion, and any relevant imaging studies. Detailed notes on treatment plans and patient history are also necessary.