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ICD10BillableValid for clinical use

ICD-10 Code I70.402: Unspecified atherosclerosis of autologous vein bypass graft(s) of the extremities, left leg

I70.402 is a billable ICD-10 diagnosis code used to classify Unspecified atherosclerosis of autologous vein bypass graft(s) of the extremities, left leg in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the circulatory system (I00-I99).

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the circulatory system (I00-I99).

When is it used?

  • May be used when a clinician documents unspecified atherosclerosis of autologous vein bypass graft(s) of the extremities, left leg in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
9Diseases of the circulatory system (I00-I99)
block
I70-I79Diseases of arteries, arterioles and capillaries
category
I70Atherosclerosis
category
I70.4Atherosclerosis of autologous vein bypass graft(s) of the extremities
category
I70.40Unspecified atherosclerosis of autologous vein bypass graft(s) of the extremities
currentI70.40

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

CardiologistGeneral Physician

Coverage-related procedures and services

CPT 75710high
ANGIOGRAPHY, EXTREMITY, UNILATERAL, RADIOLOGICAL SUPERVISION AND INTERPRETATION
Source: CMS coverage guidance
CPT 36140high
INTRODUCTION OF NEEDLE OR INTRACATHETER, UPPER OR LOWER EXTREMITY ARTERY
Source: CMS coverage guidance
CPT 37186high
SECONDARY PERCUTANEOUS TRANSLUMINAL THROMBECTOMY (EG, NONPRIMARY MECHANICAL, SNARE BASKET, SUCTION TECHNIQUE), NONCORONARY, NON-INTRACRANIAL, ARTERIAL OR ARTERIAL BYPASS GRAFT, INCLUDING FLUOROSCOPIC GUIDANCE AND INTRAPROCEDURAL PHARMACOLOGICAL THROMBOLYTIC INJECTIONS, PROVIDED IN CONJUNCTION WITH ANOTHER PERCUTANEOUS INTERVENTION OTHER THAN PRIMARY MECHANICAL THROMBECTOMY (LIST SEPARATELY IN ADDITION TO CODE FOR PRIMARY PROCEDURE)
Source: CMS coverage guidance
CPT 36218high
SELECTIVE CATHETER PLACEMENT, ARTERIAL SYSTEM; ADDITIONAL SECOND ORDER, THIRD ORDER, AND BEYOND, THORACIC OR BRACHIOCEPHALIC BRANCH, WITHIN A VASCULAR FAMILY (LIST IN ADDITION TO CODE FOR INITIAL SECOND OR THIRD ORDER VESSEL AS APPROPRIATE)
Source: CMS coverage guidance
CPT 36215high
SELECTIVE CATHETER PLACEMENT, ARTERIAL SYSTEM; EACH FIRST ORDER THORACIC OR BRACHIOCEPHALIC BRANCH, WITHIN A VASCULAR FAMILY
Source: CMS coverage guidance
CPT 36216high
SELECTIVE CATHETER PLACEMENT, ARTERIAL SYSTEM; INITIAL SECOND ORDER THORACIC OR BRACHIOCEPHALIC BRANCH, WITHIN A VASCULAR FAMILY
Source: CMS coverage guidance

Coding guidelines

Common synonyms

Unspecified atherosclerosis of autologous vein bypass graft(s) of the extremities, left legUnspecified atherosclerosis of autologous vein bypass graftUnspecified atherosclerosis of autologous vein bypass graft s of the extremities, left leg

Frequently asked questions

Code details

CodeI70.402
SystemICD10
Display nameUnspecified atherosclerosis of autologous vein bypass graft(s) of the extremities, left leg
ChapterDiseases of the circulatory system (I00-I99)
BlockDiseases of arteries, arterioles and capillaries

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Arteriosclerosis, arteriosclerotic(diffuse) (obliterans) (of) (senile) (with calcification)

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.