Nothing in this section shall be construed to authorize an insurer to furnish or directly provide services of hospitals, or psychiatric health facilities, as defined in Section 1250.2 of the Health and Safety Code, or physicians and surgeons, or psychologists or in any manner to direct, participate in, or control the selection of the hospital or health facility or physician and surgeon or psychologist from whom the insured secures services or exercise medical or dental or psychological professional judgment, except that an insurer may negotiate and enter into contracts for alternative rates of payment with institutional providers, and offer the benefit of these alternative rates to insureds who select those providers. Alternatively, insurers may, by agreement with group policyholders, limit payments under a policy to services secured by insureds from institutional providers, and after July 1, 1983, from professional providers, charging alternative rates pursuant to contract with the insurer. When alternate rates of payment to providers are applicable to contracts with group policyholders, the contracts shall include programs for the continuous review of the quality of care, performance of medical or psychological personnel included in the plan, utilization of services and facilities, and costs, by professionally recognized unrelated third parties utilizing in the case of professional providers similarly licensed providers for each medical, psychological, or dental service covered under the plan and utilizing in the case of institutional providers appropriate professional providers.