When is ICD-10 code I70.40 used?

Doctors, hospitals, and insurers may use ICD-10 code I70.40 when recording unspecified atherosclerosis of autologous vein bypass graft(s) of the extremities in a standardized format. This entry may also act as a broader category that points toward more specific child codes.

Does ICD-10 code I70.40 confirm a diagnosis?

No. A code helps standardize documentation and claims, but it should not be read as a substitute for a clinician's full assessment.

ICD10

ICD-10 Code I70.40: Unspecified atherosclerosis of autologous vein bypass graft(s) of the extremities

Name: ICD-10 Code I70.40: Unspecified atherosclerosis of autologous vein bypass graft(s) of the extremities
Creator: HealthAssure Clinical Team
Published: 2026-05-21T06:13:39.286Z

I70.40 is an ICD-10 diagnosis entry used to group records related to Unspecified atherosclerosis of autologous vein bypass graft(s) of the extremities. You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen. ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the circulatory system (I00-I99).

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. 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 in a patient's medical record.
May appear in hospital records, claims, referrals, and clinical documentation.
This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.

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.
This entry may represent a broader category rather than the most specific billable code.

Code hierarchy

chapter

9Diseases of the circulatory system (I00-I99)

block

I70-I79Diseases of arteries, arterioles and capillaries

Where you may see this code

You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.

Related specialists

CardiologistGeneral Physician

Sibling codes

I70.41Atherosclerosis of autologous vein bypass graft(s) of the extremities with intermittent claudication I70.42Atherosclerosis of autologous vein bypass graft(s) of the extremities with rest pain I70.43Atherosclerosis of autologous vein bypass graft(s) of the right leg with ulceration I70.44Atherosclerosis of autologous vein bypass graft(s) of the left leg with ulceration I70.45Atherosclerosis of autologous vein bypass graft(s) of other extremity with ulcerationbillable I70.46Atherosclerosis of autologous vein bypass graft(s) of the extremities with gangrene I70.49Other atherosclerosis of autologous vein bypass graft(s) of the extremities

Coding guidelines

Common synonyms

Unspecified atherosclerosis of autologous vein bypass graft(s) of the extremitiesUnspecified atherosclerosis of autologous vein bypass graftUnspecified atherosclerosis of autologous vein bypass graft s of the extremities

Frequently asked questions

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.