A network is a group of providers with whom the insurance company has negotiated specific rates for specific services for plan members. These providers are called in-network providers. Any provider who has not contracted with the health insurance company is considered out-of-network. Services rendered out-of-network will either be covered at a much lower percentage or, as frequently occurs with HMOs, not covered at all. By and large, provider networks are generally utilized by PPOs, POS plans, and HMOs while Indemnity plans allow their policy holders to visit any provider at their discretion at the same level of coverage.