I70.342 — Atherosclerosis of unspecified type of bypass graft(s) of the left leg with ulceration of calf
I70.342 is a billable, specific ICD-10-CM code for atherosclerosis of unspecified type of bypass graft(s) of the left leg with ulceration of calf. It is valid for submission on a claim.
Excludes1 inherited from the categories above I70.342
These are not written on I70.342, but they bind it: a note on a category applies to every code beneath it. Billing I70.342 with anything listed here is a denial.
Excludes2 inherited from the categories above I70.342
Also inherited, and the opposite of Excludes1: these conditions are not part of I70.342, but a patient can have both, so you may code both.
Written on I70 — Atherosclerosis
Other codes that can never be billed with I70.342
These codes carry an Excludes1 note pointing at I70.342. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading I70.342 alone.
- I77.6Arteritis, unspecified
Risk adjustment
I70.342 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.
Medicare coverage
I70.342 is named in 17 Medicare coverage policies — 15 listing it as supporting medical necessity, and 2 listing it as NOT covered. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56566Billing and Coding: Outpatient Physical and Occupational Therapy Servicesnot covered
- A57067Billing and Coding: Outpatient Physical and Occupational Therapy Servicesnot covered
- A53057Billing and Coding: Home Health Occupational Therapy
- A53058Billing and Coding: Home Health Physical Therapy
How I70.342 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to I70.342.
- Arteriosclerosis, arteriosclerotic›extremities›bypass graft›leg›left›with›ulceration›calf
- Arteriosclerosis, arteriosclerotic›with›critical limb ischemia›bypass graft›leg›left›with›ulceration›calf
Code history
I70.342 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share I70.34. If I70.342 is not quite right, the correct code is usually one of these.
- I70.341Atherosclerosis of unspecified type of bypass graft(s) of the left leg with ulceration of thigh
- I70.343Atherosclerosis of unspecified type of bypass graft(s) of the left leg with ulceration of ankle
- I70.344Atherosclerosis of unspecified type of bypass graft(s) of the left leg with ulceration of heel and midfoot
- I70.345Atherosclerosis of unspecified type of bypass graft(s) of the left leg with ulceration of other part of foot
- I70.348Atherosclerosis of unspecified type of bypass graft(s) of the left leg with ulceration of other part of lower leg
- I70.349Atherosclerosis of unspecified type of bypass graft(s) of the left leg with ulceration of unspecified site
Questions about I70.342
- Is I70.342 a billable ICD-10-CM code?
- Yes. I70.342 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does I70.342 sit in the tabular list?
- Diseases of the circulatory system (I00-I99), in the block Diseases of arteries, arterioles and capillaries (I70-I79).
- What cannot be coded together with I70.342?
- I70.342 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above I70.342 (I70.3) and apply to it just the same.