"Telephone medical advice service" means any business entity that employs, or contracts or subcontracts, directly or indirectly, with, the full-time equivalent of five or more persons functioning as health care professionals, whose primary function is to provide telephone medical advice, that provides telephone medical advice services to a patient at a California address. "Telephone medical advice service" does not include a medical group that operates in multiple locations in California if no more than five full-time equivalent persons at any one location perform telephone medical advice services and those persons limit the telephone medical advice services to patients being treated at that location.
Ca. Bus. and Prof'l. Code § 4999