I70.503 — Unspecified atherosclerosis of nonautologous biological bypass graft(s) of the extremities, bilateral legs
I70.503 is a billable, specific ICD-10-CM code for unspecified atherosclerosis of nonautologous biological bypass graft(s) of the extremities, bilateral legs. It is valid for submission on a claim.
Risk adjustment
I70.503 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
I70.503 is named in 12 Medicare coverage policies — 12 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
- A56232Billing and Coding: Foot Care
- A56460Billing and Coding: Dialysis Access Maintenance
- A56476Billing and Coding: Cardiac Radionuclide Imaging
How I70.503 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 I70.503.
- Arteriosclerosis, arteriosclerotic›extremities›bypass graft›nonautologous biological graft›leg›bilateral
Related codes at this level
Codes that share I70.50. If I70.503 is not quite right, the correct code is usually one of these.
- I70.501Unspecified atherosclerosis of nonautologous biological bypass graft(s) of the extremities, right leg
- I70.502Unspecified atherosclerosis of nonautologous biological bypass graft(s) of the extremities, left leg
- I70.508Unspecified atherosclerosis of nonautologous biological bypass graft(s) of the extremities, other extremity
- I70.509Unspecified atherosclerosis of nonautologous biological bypass graft(s) of the extremities, unspecified extremity
Questions about I70.503
- Is I70.503 a billable ICD-10-CM code?
- Yes. I70.503 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does I70.503 sit in the tabular list?
- Diseases of the circulatory system (I00-I99), in the block Diseases of arteries, arterioles and capillaries (I70-I79).