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v1.0.0
ICD-10 Guide
DiagnosesArterial Insufficiency

Arterial Insufficiency

ICD-10 Coding for Arterial Insufficiency(I70.21, I70.23)

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

Diagnosis Overview

What is Arterial Insufficiency?
Essential facts and insights about Arterial Insufficiency

Key Clinical Considerations:

  • Patients may present with claudication, rest pain, or non-healing wounds in the lower extremities.
  • Doppler ultrasound may reveal reduced blood flow or abnormal waveforms in affected arteries.
  • Physical examination may show diminished or absent pulses in the affected limb, coolness to touch, or skin changes.
  • Angiography may demonstrate stenosis or occlusion in the arterial supply to the lower extremities.
  • Severity can be staged using the Rutherford classification, ranging from asymptomatic to critical limb ischemia.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Medical records must include a detailed history of symptoms, risk factors, and physical examination findings.
  • Terms such as 'peripheral artery disease' or 'ischemic limb' should be documented clearly.
  • Examples include: 'Patient presents with intermittent claudication in the left calf' or 'Doppler studies indicate significant arterial occlusion.'
  • Documentation must support medical necessity for diagnostic tests and treatments provided.
  • Quality measures may include documenting the patient's functional status and treatment outcomes.

Coding Guidelines

Usage Guidelines & Examples

  • Use I70.21 for atherosclerosis of native arteries of the extremities with intermittent claudication and I70.23 for atherosclerosis with critical limb ischemia.
  • Do not use these codes for venous insufficiency or other non-arterial conditions.
  • I73.9 (Peripheral vascular disease, unspecified) may be used when the specific cause is not determined.
  • Common errors include using the wrong code for the severity of symptoms or failing to document the clinical rationale.
  • In complex cases, ensure to review all clinical findings and consider additional codes for co-morbid conditions.

Code Exclusions

Important Exclusions

  • Do not use these codes for venous insufficiency (I87.2) or other non-arterial conditions.
  • Alternative codes for excluded conditions include I83 (Varicose veins) for venous issues.
  • Conditions are excluded to ensure accurate representation of arterial pathology.
  • Common mistakes include misclassifying venous conditions as arterial insufficiency.
  • Related conditions such as Raynaud's phenomenon (I73.00) should be coded separately.

Related ICD-10 Codes

Primary Codes
I70.21
Atherosclerosis of native arteries of the extremities with intermittent claudication
I70.23
Atherosclerosis of native arteries of the extremities with critical limb ischemia
Ancillary Codes
E11.51
E11.52
Differential Codes
I73.9
I73.9
only if atherosclerosis is not confirmed.
L97.-
L97
.- for ulcer site specification.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Vascular Surgery

Specialty Applications

  • This diagnosis applies to patients with peripheral artery disease, particularly in the lower extremities.
  • Higher prevalence in older adults, smokers, and those with diabetes or hyperlipidemia.
  • Clinical settings include outpatient vascular clinics, inpatient surgical units, and emergency departments.
  • Vascular surgery specialists often manage these cases, particularly for surgical interventions.
  • Treatment contexts include lifestyle modifications, pharmacotherapy, and surgical revascularization.

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 arterial insufficiency based on clinical findings of claudication.'

Template 2

Template: 'Clinical presentation consistent with arterial insufficiency including rest pain and non-healing ulcers.'

Template 3

Template: 'Diagnostic criteria for arterial insufficiency met as evidenced by Doppler ultrasound findings.'

Template 4

Template: 'Treatment plan initiated for arterial insufficiency with lifestyle modifications and pharmacotherapy.'

Template 5

Template: 'Follow-up care for arterial insufficiency including monitoring of blood flow and symptom resolution.'

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 should include patient history, physical exam findings, and results from diagnostic tests.

How does this differ from similar diagnoses?

Arterial insufficiency is characterized by reduced blood flow due to arterial blockage, unlike venous insufficiency which involves venous return issues.

What are common billing considerations?

Ensure that the diagnosis is supported by clinical documentation and that all services provided are medically necessary.

What procedures are typically associated?

Commonly associated procedures include angioplasty, stenting, and bypass surgery.

Are there any quality reporting implications?

Quality measures may include tracking patient outcomes and adherence to treatment protocols.