Answer:
The best answer to the question: Which type of health insurance provider generally does not allow patients to obtain services outside its preferred network of doctors and specialists, would be: D: Health maintenance organization (HMO).
Explanation:
Although there is another health insurance plan (EPO), that definitely does not allow a member to seek care outside of the network of healthcare providers that contract with the insurance company, HMO´s also have this limitation. That is why they are much cheaper than other plans, but require first the intermediation of a primary care physician (PCP), referrals to specialists from that PCP, and assistance to customers within the network contracted by the company. Any medical assistance given outside of this network will have to be covered by the insured and those under the HMO plan.
