Other laboratory and X-ray services means professional and technical laboratory and radiological services—
(a)
Ordered and provided by or under the direction of a physician or other licensed practioner of the healing arts within the scope of his practice as defined by State law or ordered by a physician but provided by referral laboratory;
(b)
Provided in an office or similar facility other than a hospital outpatient department or clinic; and
[46 FR 42672, Aug. 24, 1981, as amended at 57 FR 7135, Feb. 28, 1992]