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I70.242

I70.242: Atherosclerosis of native arteries of left leg with ulceration of calf

Billable / specific codeICD-10-CMleft

I70.242 is a billable, specific ICD-10-CM code for atherosclerosis of native arteries of left leg with ulceration of calf. It is valid for submission on a claim.

Check I70.242 with the rest of the claim: free scrubber

Excludes2 inherited from the categories above I70.242

Not part of this code, but both may be coded when both are present.

Written on I70.2: Atherosclerosis of native arteries of the extremities

  • atherosclerosis of bypass graft of extremities (I70.30-I70.79)

Written on I70: Atherosclerosis

  • 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)

Other codes that can never be billed with I70.242

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • I77.6Arteritis, unspecified

Risk adjustment

I70.242 risk-adjusts. Under the CMS-HCC V28 model it maps to these categories:

  • HCC 263 Atherosclerosis of Arteries of the Extremities with Ulceration or Gangrene1.118 RAF
  • HCC 383 Chronic Ulcer of Skin, Except Pressure, Not Specified as Through to Bone or Muscle0.646 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.

Medicare coverage

I70.242 is named in 43 Medicare coverage policies: 41 listing it as supporting medical necessity, and 2 listing it as NOT covered. Which one applies depends on your Medicare contractor.

  • A56566Billing and Coding: Outpatient Physical and Occupational Therapy Servicesnot covered
  • A57067Billing and Coding: Outpatient Physical and Occupational Therapy Servicesnot covered
  • A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
  • A52996Billing and Coding: Routine Foot Care

Alphabetic index entries that lead here

  • Arteriosclerosis, arteriosclerotic›extremities›leg›left›with›ulceration›calf
  • Arteriosclerosis, arteriosclerotic›with›critical limb ischemia›leg›left›with›ulceration›calf

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under I70.24

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.