ICD10
ICD-10 Code I70.21: Atherosclerosis of native arteries of extremities with intermittent claudication
Reviewed by HealthAssure Clinical TeamUpdated 26 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 atherosclerosis of native arteries of extremities with intermittent claudication 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
category
I70Atherosclerosis
category
I70.2Atherosclerosis of native arteries of the extremities
currentI70.2
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
Related codes
I70.211Atherosclerosis of native arteries of extremities with intermittent claudication, right legcodeI70.212Atherosclerosis of native arteries of extremities with intermittent claudication, left legcodeI70.213Atherosclerosis of native arteries of extremities with intermittent claudication, bilateral legscodeI70.218Atherosclerosis of native arteries of extremities with intermittent claudication, other extremitycodeI70.219Atherosclerosis of native arteries of extremities with intermittent claudication, unspecified extremitycode
Sibling codes
I70.20Unspecified atherosclerosis of native arteries of extremitiesI70.22Atherosclerosis of native arteries of extremities with rest painI70.23Atherosclerosis of native arteries of right leg with ulcerationI70.24Atherosclerosis of native arteries of left leg with ulcerationI70.25Atherosclerosis of native arteries of other extremities with ulcerationbillableI70.26Atherosclerosis of native arteries of extremities with gangreneI70.29Other atherosclerosis of native arteries of extremities
Mapped diagnoses and classifications
SNOMED_CT 49176002high
Arteriosclerotic gangrene
Source: SNOMED International ICD-10 map
SNOMED_CT 15649941000119102high
Bilateral atherosclerosis of lower limbs with gangrene
Source: SNOMED International ICD-10 map
SNOMED_CT 15649991000119105high
Gangrene of left lower limb due to atherosclerosis
Source: SNOMED International ICD-10 map
SNOMED_CT 16065651000119107high
Gangrene of left lower limb due to atherosclerosis of autologous bypass graft
Source: SNOMED International ICD-10 map
SNOMED_CT 15650031000119103high
Gangrene of left upper limb due to atherosclerosis
Source: SNOMED International ICD-10 map
SNOMED_CT 792843009high
Gangrene of limb due to atherosclerosis of artery of limb
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.
Legacy codes
I70.21
Replacement codes
I70.211 — Atherosclerosis of native arteries of extremities with intermittent claudication, right legI70.212 — Atherosclerosis of native arteries of extremities with intermittent claudication, left legI70.213 — Atherosclerosis of native arteries of extremities with intermittent claudication, bilateral legsI70.218 — Atherosclerosis of native arteries of extremities with intermittent claudication, other extremityI70.219 — Atherosclerosis of native arteries of extremities with intermittent claudication, unspecified extremity
Common synonyms
Atherosclerosis of native arteries of extremities with intermittent claudication
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.