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I70.539 vs I70.549

I70.539 (Atherosclerosis of nonautologous biological bypass graft(s) of the right leg with ulceration of unspecified site) compared with I70.549 (Atherosclerosis of nonautologous biological bypass graft(s) of the left leg with ulceration of unspecified site), from the official CMS tabular data. I70.539 and I70.549 code the same condition on opposite sides. MedCoder-derived

Relationship

Review

Laterality relationship

I70.539
Right
Atherosclerosis of nonautologous biological bypass graft(s) of the right leg with ulceration of unspecified site
↔
I70.549
Left
Atherosclerosis of nonautologous biological bypass graft(s) of the left leg with ulceration of unspecified site

Same condition; these differ only in which side is documented.

These codes share a category and title and differ only in the side affected. The documentation decides which applies, and a bilateral code is reported only where the code set provides one.

Source: ICD-10-CM tabular list (laterality variant derived from the code title)

Can these codes be reported together?

Same condition, opposite side. I70.539 and I70.549 name the same condition on opposite sides of the body.

Same category and title, differing only in which side is affected — the documentation decides which one applies, and a bilateral code is reported only where the code set provides one.

Side by side

I70.539Atherosclerosis of nonautologous biological bypass graft(s) of the right leg with ulceration of unspecified siteI70.549Atherosclerosis of nonautologous biological bypass graft(s) of the left leg with ulceration of unspecified site
Billing statusBillableBillable
ClassificationI00-I99 — Diseases of the circulatory systemI00-I99 — Diseases of the circulatory system
DefinitionAtherosclerosis of nonautologous biological bypass graft(s) of the right leg with ulceration of unspecified site is a billable ICD-10-CM diagnosis code (I70.539).Atherosclerosis of nonautologous biological bypass graft(s) of the left leg with ulceration of unspecified site is a billable ICD-10-CM diagnosis code (I70.549).
Includes
any condition classifiable to I70.511 and I70.521
chronic limb-threatening ischemia of nonautologous biological bypass graft(s) of the right leg with ulceration
critical limb ischemia of nonautologous biological bypass graft(s) of the right leg with ulceration
arteriolosclerosis
any condition classifiable to I70.512 and I70.522
chronic limb-threatening ischemia of nonautologous biological bypass graft(s) of the left leg with ulceration
critical limb ischemia of nonautologous biological bypass graft(s) of the left leg with ulceration
arteriolosclerosis
Use additional code
code to identify severity of ulcer (L97.-)
code, if applicable, to identify chronic total occlusion of artery of extremity (I70.92)
code to identify:
code to identify severity of ulcer (L97.-)
code, if applicable, to identify chronic total occlusion of artery of extremity (I70.92)
code to identify:
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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources