ICDxICD-10 Medical Coding

ICDxICD-10 Medical Coding

ICD-10 Guide

Atherosclerosis Iliac Artery

ICD-10 Coding for Atherosclerosis of Iliac Artery(I70.8)

PRIMARY SPECIALTYVascular Surgery

COMPLEXITYHigh

LAST UPDATED09/15/2025

Sam Tuffun, PT, DPT

Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Atherosclerosis Iliac Artery?

Essential facts and insights about Atherosclerosis of Iliac Artery

Key Clinical Considerations:

Patients may present with intermittent claudication, leg pain during exertion, or rest pain in severe cases.
Doppler ultrasound may show reduced blood flow in the iliac arteries, and angiography can reveal stenosis or occlusion.
Physical examination may reveal diminished or absent pulses in the lower extremities, coolness of the skin, or hair loss on the legs.
Imaging studies such as CT angiography or MR angiography may demonstrate atherosclerotic changes in the iliac arteries.
Severity can be assessed based on the degree of stenosis (e.g., <50%, 50-70%, >70%) and the presence of symptoms.

Clinical Information

Clinical Criteria & Documentation Requirements

Medical records must include a clear diagnosis of atherosclerosis of the iliac artery supported by clinical findings.
Specific terminology such as 'stenosis', 'occlusion', or 'atherosclerotic plaque' must be documented.
Examples include: 'Patient diagnosed with atherosclerosis of the iliac artery based on imaging findings.'
Documentation must demonstrate medical necessity for any procedures or treatments related to the diagnosis.
Quality measures may include documentation of risk factor management and follow-up care.

Coding Guidelines

Usage Guidelines & Examples

Use this diagnosis code when a patient has confirmed atherosclerosis affecting the iliac artery with symptoms.
Do not use this code for patients with atherosclerosis affecting other vascular territories or without symptoms.
Related codes include I70.9 (Atherosclerosis, unspecified) and I70.2 (Atherosclerosis of native arteries of the extremities).
Common errors include using the code without sufficient documentation of symptoms or imaging findings.
In complex cases, ensure to document all relevant clinical details to support the selected code.

Code Exclusions

Important Exclusions

Excluded conditions include acute arterial occlusion (I74) and atherosclerosis affecting other arteries.
Alternative codes for excluded conditions may include I73.9 for unspecified peripheral vascular disease.
Conditions are excluded to ensure accurate representation of the specific vascular pathology.
Common mistakes include misclassifying acute occlusions as chronic atherosclerosis.
Related but distinct conditions include thromboangiitis obliterans (Buerger's disease) and venous disease.

Specialty Focus

Primary Specialty

Vascular Surgery

Specialty Applications

This diagnosis applies to patients with atherosclerosis affecting the iliac artery, often presenting with claudication.
Patient populations include adults, particularly those over 50, with risk factors such as smoking, diabetes, and hypertension.
Clinical settings include outpatient vascular clinics, inpatient hospital settings, and emergency departments.
Specialty-specific applications are relevant in vascular surgery and interventional radiology.
Treatment contexts include surgical interventions like 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 atherosclerosis of the iliac artery based on imaging findings.'

Template 2

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

Template 3

Template: 'Diagnostic criteria met as evidenced by Doppler ultrasound showing reduced blood flow.'

Template 4

Template: 'Treatment plan initiated for atherosclerosis with angioplasty scheduled.'

Template 5

Template: 'Follow-up care for atherosclerosis including monitoring of blood pressure and cholesterol 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 clinical findings, imaging results, and symptom descriptions.

How does this differ from similar diagnoses?

Differentiation is based on the location and severity of atherosclerosis and associated symptoms.

What are common billing considerations?

Ensure that all services provided are medically necessary and supported by documentation.

What procedures are typically associated?

Common procedures include angioplasty, stenting, and bypass surgery.

Are there any quality reporting implications?

Quality measures may include monitoring of risk factors and outcomes related to vascular health.