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v1.0.0
ICD-10 Guide
DiagnosesPad Unspecified

Pad Unspecified

ICD-10 Coding for Peripheral Artery Disease (PAD) Unspecified(I73.9)

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

Diagnosis Overview

What is Pad Unspecified?
Essential facts and insights about Peripheral Artery Disease (PAD) Unspecified

Key Clinical Considerations:

  • Intermittent claudication
  • Rest pain in lower extremities
  • Non-healing wounds or ulcers on feet or legs

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient history of vascular disease
  • Assessment of limb perfusion
  • Detailed description of symptoms and their duration

Coding Guidelines

Usage Guidelines & Examples

  • Follow guidelines for coding unspecified conditions to avoid denials.
  • Common errors include using more specific codes when unspecified is appropriate.

Code Exclusions

Important Exclusions

  • Acute limb ischemia
  • Chronic venous insufficiency
  • Other specified peripheral vascular diseases

Related ICD-10 Codes

Primary Codes
I73.9
Peripheral vascular disease, unspecified
Ancillary Codes
R02.0
Z79.84
Differential Codes
I70.2
I70.2
when atherosclerosis is confirmed by imaging.
E11.51
E11.51
when PAD is due to diabetes.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Internal Medicine

Specialty Applications

  • Adults with risk factors for vascular disease
  • Outpatient internal medicine settings

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?

Document patient history, symptoms, and any diagnostic tests performed.

Billing considerations?

Ensure accurate coding to reflect the severity and specificity of the condition.