ICDxICD-10 Medical Coding

ICDxICD-10 Medical Coding

ICD-10 Guide

Atherosclerotic Coronary Artery Disease

ICD-10 Coding for Atherosclerotic Coronary Artery Disease(I25.10, I25.110)

PRIMARY SPECIALTYCardiology

COMPLEXITYHigh

LAST UPDATED09/15/2025

Sam Tuffun, PT, DPT

Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Atherosclerotic Coronary Artery Disease?

Essential facts and insights about Atherosclerotic Coronary Artery Disease

Key Clinical Considerations:

Patients may present with chest pain (angina), shortness of breath, or fatigue during exertion.
Laboratory findings may include elevated cholesterol levels, particularly low-density lipoprotein (LDL) and triglycerides.
Physical examination may reveal signs of heart failure, such as edema, elevated jugular venous pressure, or abnormal heart sounds.
Imaging findings may include coronary angiography showing stenosis or occlusion of coronary arteries, or non-invasive imaging such as stress tests indicating ischemia.
Severity criteria may be assessed using the Canadian Cardiovascular Society (CCS) classification for angina or the New York Heart Association (NYHA) classification for heart failure.

Clinical Information

Clinical Criteria & Documentation Requirements

Medical records must document the patient's symptoms, clinical findings, and any diagnostic tests performed.
Specific terminology such as 'atherosclerotic coronary artery disease' or 'CAD' must be used consistently.
Examples include documenting the degree of stenosis found on angiography or the patient's functional capacity.
Medical necessity must be established through documentation of symptoms and the need for diagnostic testing or treatment.
Quality measures may require documentation of risk factor management, such as smoking cessation or lipid management.

Coding Guidelines

Usage Guidelines & Examples

Use I25.10 for unspecified atherosclerotic heart disease and I25.110 for atherosclerotic heart disease with angina.
Do not use these codes for non-atherosclerotic causes of coronary artery disease, such as vasospastic angina.
Related codes include I25.2 (old myocardial infarction) and I25.3 (other forms of chronic ischemic heart disease).
Common errors include using the code for acute coronary syndromes or failing to specify the type of angina.
In complex cases, ensure to document all contributing factors and specify the type of coronary artery disease.

Code Exclusions

Important Exclusions

Excludes conditions such as I20.0 (unstable angina) and I21 (acute myocardial infarction).
Alternative codes for excluded conditions include I20.9 for unspecified angina.
Conditions are excluded to ensure accurate representation of chronic versus acute coronary syndromes.
Common mistakes include misclassifying acute coronary syndromes as chronic atherosclerotic disease.
Related but distinct conditions include coronary artery spasm (I24.0) and other forms of ischemic heart disease.

Specialty Focus

Primary Specialty

Cardiology

Specialty Applications

This diagnosis applies to patients with a history of coronary artery disease, myocardial infarction, or angina.
Patient populations include adults, particularly those over 45 years of age, with risk factors such as obesity, smoking, and family history.
Clinical settings include outpatient cardiology clinics, inpatient hospital settings, and emergency departments.
Specialty-specific applications are relevant in cardiology, internal medicine, and primary care.
Treatment contexts include management of chronic stable angina and post-myocardial infarction care.

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

Template 1

Template: 'Patient diagnosed with atherosclerotic coronary artery disease based on clinical findings of chest pain and stress test results.'

Template 2

Template: 'Clinical presentation consistent with atherosclerotic coronary artery disease including exertional angina and positive angiography.'

Template 3

Template: 'Diagnostic criteria for atherosclerotic coronary artery disease met as evidenced by significant stenosis on coronary angiography.'

Template 4

Template: 'Treatment plan initiated for atherosclerotic coronary artery disease with lifestyle modifications and statin therapy.'

Template 5

Template: 'Follow-up care for atherosclerotic coronary artery disease including monitoring of lipid levels and exercise tolerance.'

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

What documentation is required for this diagnosis?

Documentation must include clinical symptoms, diagnostic test results, and treatment plans.

How does this differ from similar diagnoses?

Atherosclerotic coronary artery disease is chronic, while acute coronary syndromes are time-sensitive and require different coding.

What are common billing considerations?

Ensure that documentation supports the medical necessity of tests and treatments to optimize reimbursement.

What procedures are typically associated?

Commonly associated procedures include coronary angiography (CPT 93452) and stress testing (CPT 93015).

Are there any quality reporting implications?

Quality measures may include monitoring lipid levels and adherence to guidelines for managing cardiovascular risk factors.