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v1.0.0
ICD-10 Guide
DiagnosesNon Obstructive Coronary Artery Disease

Non Obstructive Coronary Artery Disease

ICD-10 Coding for Non-Obstructive Coronary Artery Disease(I25.84, I25.83)

PRIMARY SPECIALTYCardiology
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Non Obstructive Coronary Artery Disease?
Essential facts and insights about Non-Obstructive Coronary Artery Disease

Key Clinical Considerations:

  • Chest pain or discomfort
  • Shortness of breath during exertion
  • Fatigue or weakness
  • Key diagnostic tests/findings: Coronary angiography showing no significant stenosis, Stress testing results indicating ischemia without obstruction
  • Physical exam findings: Normal heart sounds, absence of peripheral edema

Clinical Information

Clinical Criteria & Documentation Requirements

  • Required documentation elements: Patient history, symptom description, test results, treatment plan
  • Specific coding terminology: Non-obstructive coronary artery disease, stable angina, ischemic heart disease
  • Documentation examples: 'Patient presents with chest pain, stress test shows ischemic changes without obstructive lesions.'

Coding Guidelines

Usage Guidelines & Examples

  • Usage guidelines: Use specific codes for non-obstructive cases to ensure proper reimbursement.
  • Common errors: Misclassifying as obstructive coronary artery disease.

Code Exclusions

Important Exclusions

  • Excluded conditions: Obstructive coronary artery disease, myocardial infarction.
  • Alternative codes: I25.2 (Old myocardial infarction) may be considered if applicable.

Related ICD-10 Codes

Primary Codes
I25.10
Atherosclerotic heart disease of native coronary artery without angina pectoris
I25.110
Atherosclerotic heart disease of native coronary artery with unstable angina pectoris
Ancillary Codes
I20.8
Differential Codes
I25.83
I25.83
when the plaque is lipid-rich rather than calcified.
I25.84
I25.84
when the plaque is calcified rather than lipid-rich.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Cardiology

Specialty Applications

  • Patient populations: Adults with risk factors for coronary artery disease, those with atypical chest pain.
  • Clinical settings: Cardiology clinics, outpatient settings, emergency departments.

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?

Include detailed patient history, symptomatology, and results from diagnostic tests.

Billing considerations?

Ensure accurate coding to reflect non-obstructive nature to avoid denials.