Which HMO insurance companies are mentioned as contracted services?

The correct choice highlights Memorial Care and Tricare as prominent contracted services. Memorial Care is known for its extensive network of healthcare facilities and providers, making it a sought-after option for HMO insurance plans. Tricare, on the other hand, offers health benefits for military personnel, retirees, and their dependents, thus providing a significant and specialized service addition to HMO offerings.

The presence of Greater Newport and Regal further illustrates a network of providers that health maintenance organizations rely on to deliver comprehensive care to their members. By including these entities, the response underscores the diverse nature of contracted services available through HMOs.

While other options also list various companies, they do not include the same combination of recognized healthcare providers and insurance programs that specifically align with HMO contractual arrangements. This awareness of the differences between the options can help in understanding the landscape of healthcare services provided through HMOs.