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A key characteristic of HMO (Health Maintenance Organization) MA (Medicare Advantage) Plans is that members must receive services from contracted network providers. This structure is fundamental to how HMOs operate, as they focus on providing care through a specific network of doctors, hospitals, and other healthcare providers. By utilizing network providers, HMOs can better manage costs and provide coordinated care for their members.

This requirement encourages patients to utilize preventive services and seek care from providers who work closely together, ultimately guiding them through their healthcare journey. It's essential for members to understand that the network is designed to streamline services and create efficiencies in care delivery.

In contrast, options that suggest no referrals for specialists or the ability to use any healthcare provider do not align with the HMO model, which typically does require referrals for specialist services and restricts members to the network of contracted providers. Additionally, suggesting HMOs are only available in urban areas ignores the variety of locations in which these plans can operate, which may include many rural areas as well.