Table I.

Procedural and diagnostic codes for inclusion

Lower-extremity vascular bypass CPT inclusion codes			ICD-9 inclusion codes
Code	Conduit	Anatomic level	Code	Diagnosis
35556	Vein	Femoral to popliteal	440.22	Atherosclerosis of native arteries of the extremities with rest pain
35566	Vein	Femoral to tibial, peroneal, or other distal vessel	440.23	Atherosclerosis of native arteries of the extremities with ulceration
35570	Vein	Tibial to tibial, peroneal, or other distal vessel	440.24	Atherosclerosis of native arteries of the extremities with gangrene
35571	Vein	Popliteal to tibial, peroneal, or other distal vessel	707.06	Chronic ulcer of skin, ankle
35583	In situ vein	Femoral popliteal bypass	707.07	Chronic ulcer of skin, heel
35585	In situ vein	Femoral to tibial, peroneal, or other distal vessel	707.1	Ulcer of lower limb, except pressure ulcer
35587	In situ vein	Popliteal to tibial, peroneal, or other distal vessel	707.10	Unspecified ulcer of lower limb
35656	Grafta	Femoral popliteal bypass	707.12	Ulcer of calf
35666	Grafta	Femoral to tibial, peroneal, or other distal vessel	707.13	Ulcer of ankle
35671	Grafta	Popliteal to tibial, peroneal, or other distal vessel	707.14	Ulcer of heel and midfoot
			707.15	Ulcer of other part of foot
			707.19	Ulcer of other part of lower limb
			707.9	Chronic ulcer of unspecified site
			785.4	Gangrene

CPT, Current Procedure Terminology; ICD-9, International Classification of Disease, ninth edition.

CPT codes and ICD-9 codes used for case selection.

At least one CPT code from this table was required for patient inclusion in the study.

In absence of rest pain variable in NSQIP database being yes, at least one of the above ICD-9 codes was required for study inclusion.

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^a“Graft” denotes use of a graft other than vein for bypass conduit.