The ABI study is reimbursable using CPT code 93922, 93923. The sudomotor study is reimbursable using CPT code 95923. The ABI and the Sudomotor study are two separate and billable events.
Limited bilateral noninvasive physiologic studies of upper or lower extremity arteries (e.g. for lower extremity: ankle/brachial indices at distal posterior tibial and anterior tibial/dorsalis pedis arteries plus bidirectional, doppler waveform recording and analysis at 1-2 levels, or ankle/brachial indices at distal posterior tibial and anterior tibial/dorsalis pedis arteries plus volume plethysmography at 1-2 levels, or ankle/brachial indices at distal posterior tibial and anterior tibial/dorsalis pedis arteries with transcutaneous oxygen tension measurement at 1-2 levels)
Use procedure code 93922 as the default code for ABI studies.
CPT CODE 93923 (average fee payment) ≈ $130 to $140 reimbursement
Complete bilateral noninvasive physiologic studies of upper or lower extremity arteries, 3 or more levels (e.g., for lower extremity: ankle/brachial indices at distal posterior tibial and anterior tibial/dorsalis pedis arteries plus segmental blood pressure measurements with bidirectional doppler waveform recording and analysis, at 3 or more levels, or ankle/brachial indices at distal posterior tibial and anterior tibial/dorsalis pedis arteries plus segmental volume plethysmography at 3 or more levels, or ankle/brachial indices at distal posterior tibial and anterior tibial/dorsalis pedis arteries plus segmental transcutaneous oxygen tension measurements at 3 or more levels), or single level study with provocative functional maneuvers (e.g., measurements with postural provocative tests, or measurements with reactive hyperemia)
CPT CODE 95923 (average fee payment) ≈ $140 reimbursement
Sudomotor function testing - Used to evaluate and document neuropathic disturbances that may be associated with pain. The quantitative sudomotor axon reflex test (QSART), thermoregulatory sweat test (TST), sympathetic skin responses, and silastic sweat imprints are tests of sympathetic cholinergic sudomotor function. The QSART measures axon reflex-mediated sudomotor responses quantitatively and evaluates post-ganglionic sudomotor function. Recording is usually carried out from the forearm and three lower extremity skin sites to assess the distribution of post-ganglionic deficits. The TST evaluates the distribution of sweating by a change in color of an indicator powder. This test has a high sensitivity, and its specificity for delineating the site of lesion is greatly enhanced when used in conjunction with QSART.
Sweat imprints are formed by the secretion of active sweat glands into a plastic (silastic) imprint. The test can determine sweat gland density, a histogram of sweat droplet size and sweat volume per area.
Dr. Jeffrey Lehrman, DPM, FASPS, MAPWCA, CPC
Don't take our word for it! Click the link below to view a webinar of nationally recognized CPC Dr. Jeffrey Lehrman discussing the patient selection criteria for arterial studies as well as the coding, compliance and documentation needed to bill for these studies in your office.
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