An in-network provider who has a contract with your health insurance plan to provide services to you at a discount. Check your policy to see if you can see all preferred providers. Some health insurance or plans have “tiered” networks, and you must pay extra to see some providers. Your health insurance plan may have preferred providers who are also “participating” providers. Participating providers also contract with your health insurer plan, but the discount may not be as great, and you may have to pay more.