Can anyone tell me the correct CPT code for noninvasive vascular study of extremity arteries without the ABI result (without the index itself) but only with the statement of "ABI noncompressible", or "ABI nondiagnostic", or "ABI unobtainable"? Do we consider these statements as equivalent to having the ABI result? Per AMA, the ABI is a requirement for coding 93922/93923. And based on CPT Assistant, noninvasive vascular testing without an ABI yields to an unlisted CPT code (93998).