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I70.243

✓ Billable

Atherosclerosis of native arteries of left leg with ulceration of ankle

Diseases of the circulatory system (I00-I99)

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⚠️ Excludes2

inherited

Rules inherited from parent codes.

I70.2
  • • atherosclerosis of bypass graft of extremities (I70.30-I70.79)
I70
  • • arteriosclerotic cardiovascular disease (I25.1-)
  • • arteriosclerotic heart disease (I25.1-)
  • • atheroembolism (I75.-)
  • • cerebral atherosclerosis (I67.2)
  • • coronary atherosclerosis (I25.1-)
  • • mesenteric atherosclerosis (K55.1)
  • • precerebral atherosclerosis (I67.2)
  • • primary pulmonary atherosclerosis (I27.0)

📋 Code Instructions

inherited
I70.24
  • • code to identify severity of ulcer (L97.-)
I70.2
  • • code, if applicable, to identify chronic total occlusion of artery of extremity (I70.92)
I70
  • • code to identify:
  • • exposure to environmental tobacco smoke (Z77.22)
  • • history of tobacco dependence (Z87.891)
  • • occupational exposure to environmental tobacco smoke (Z57.31)
  • • tobacco dependence (F17.-)
  • • tobacco use (Z72.0)

Clinical Description

ICD-10-CM code I70.243 represents atherosclerosis of native arteries of left leg with ulceration of ankle. This code falls under the Diseases of the circulatory system (I00-I99) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.

This is a 7-character code at the 6th level of specificity. This is the most specific code available in this subcategory.

Frequently Asked Questions

What is ICD-10 code I70.243?

ICD-10-CM code I70.243 is "Atherosclerosis of native arteries of left leg with ulceration of ankle". It belongs to the category: Diseases of the circulatory system (I00-I99).

Is I70.243 a billable ICD-10 code?

Yes, I70.243 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

Can I70.243 be coded with other codes?

I70.243 has 9 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.

Related Codes in I70.24

Other codes in the same category that may be relevant for differential coding:

I70.241Atherosclerosis of native arteries of left leg with ulceration of thighI70.242Atherosclerosis of native arteries of left leg with ulceration of calfI70.244Atherosclerosis of native arteries of left leg with ulceration of heel and midfootI70.245Atherosclerosis of native arteries of left leg with ulceration of other part of footI70.248Atherosclerosis of native arteries of left leg with ulceration of other part of lower legI70.249Atherosclerosis of native arteries of left leg with ulceration of unspecified site

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Code Information

CodeI70.243
BillableYes
ParentI70.24
CategoryDiseases of the circulatory system (I00-I99)
Excludes10 rule(s)
Excludes29 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)