ICDxICD-10 Medical Coding

ICDxICD-10 Medical Coding

ICD-10 Guide

Atherosclerotic Disease

ICD-10 Coding for Atherosclerotic Disease(I25.10, I70.2)

PRIMARY SPECIALTYCardiology

COMPLEXITYHigh

LAST UPDATED09/15/2025

Sam Tuffun, PT, DPT

Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Atherosclerotic Disease?

Essential facts and insights about Atherosclerotic Disease

Key Clinical Considerations:

Presence of symptoms such as chest pain, 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 peripheral artery disease, such as diminished pulses or skin changes.
Imaging findings may include angiography showing narrowed or blocked arteries, or ultrasound revealing plaque buildup.
Severity criteria may include the degree of arterial blockage or the presence of ischemic heart disease.

Clinical Information

Clinical Criteria & Documentation Requirements

Medical records must document the patient's symptoms, risk factors, and any relevant family history.
Specific terminology such as 'atherosclerosis', 'coronary artery disease', or 'peripheral vascular disease' must be used.
Examples include documenting the patient's presenting symptoms, diagnostic tests performed, and treatment plans.
Medical necessity must be established through documentation of symptoms and the need for diagnostic testing or treatment.
Quality measures may include documentation of lifestyle modifications, medication adherence, and follow-up care.

Coding Guidelines

Usage Guidelines & Examples

Use I25.10 for atherosclerotic heart disease without angina; use I70.2 for atherosclerosis of the aorta.
Do not use these codes for non-atherosclerotic vascular diseases such as vasculitis or thromboembolic disease.
I25.9 (chronic ischemic heart disease, unspecified) may be used when the specific type of atherosclerosis is not documented.
Common errors include using the wrong code for the type of atherosclerosis or failing to document the severity.
In complex cases, ensure to document all relevant clinical findings and consider multiple codes if necessary.

Code Exclusions

Important Exclusions

Excludes conditions such as acute myocardial infarction (I21) and unstable angina (I20.0).
Alternative codes for excluded conditions include I21.9 for unspecified myocardial infarction.
Conditions are excluded to ensure accurate representation of the patient's diagnosis and treatment needs.
Common mistakes include misclassifying acute events as chronic atherosclerotic disease.
Related but distinct conditions include coronary artery spasm and vasculitis.

Specialty Focus

Primary Specialty

Cardiology

Specialty Applications

Applies to patients with coronary artery disease, peripheral artery disease, and cerebrovascular disease.
Patient populations include adults, particularly those over 45 years, with risk factors such as smoking, obesity, and diabetes.
Clinical settings include outpatient cardiology clinics, inpatient hospital settings, and emergency departments.
Specialty-specific applications are relevant in cardiology, vascular surgery, and primary care.
Treatment contexts include management of cardiovascular risk factors and interventions such as angioplasty or bypass surgery.

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 disease based on clinical findings of chest pain and imaging results.'

Template 2

Template: 'Clinical presentation consistent with atherosclerosis including symptoms of intermittent claudication.'

Template 3

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

Template 4

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

Template 5

Template: 'Follow-up care for atherosclerotic disease including monitoring of blood pressure and lipid levels.'

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 patient history, clinical findings, and diagnostic test results.

How does this differ from similar diagnoses?

Atherosclerotic disease is characterized by plaque buildup, while other conditions may involve inflammation or thrombosis.

What are common billing considerations?

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

What procedures are typically associated?

CPT codes for related procedures include 92928 for coronary angioplasty and 33533 for coronary artery bypass.

Are there any quality reporting implications?

Quality measures may include monitoring lipid levels and adherence to prescribed medications.