42 CFR §405.2413

1. (a)Services and supplies incident to a physician's professional service are reimbursable under this subpart if the service or supply is:
   1. (1)Of a type commonly furnished in physicians' offices;
   2. (2)Of a type commonly rendered either without charge or included in the RHC's or FQHC's bill;
   3. (3)Furnished as an incidental, although integral, part of a physician's professional services;
   4. (4)Services and supplies must be furnished in accordance with applicable State law; and
   5. (5)Furnished under the direct supervision of a physician, except that services and supplies furnished incident to Transitional Care Management, General Care Management, the Psychiatric Collaborative Care Model, and behavioral health services can be furnished under general supervision of a physician when these services or supplies are furnished by auxiliary personnel, as defined in § 410.26(a)(1) of this chapter.
2. (b)Only drugs and biologicals which cannot be self-administered are included within the scope of this benefit.