Most Common Types of Medicare Advantage Plans There are various types of Medicare Advantage plans. The two most frequently used are: HMOs (Health Maintenance Organizations). HMOs have closed provider networks and you usually have to get all care within your plan’s network except for emergency services. You choose a primary care doctor (PCP) who manages all of your medical care. These plans often require a referral for specialist care and prior authorization for certain tests and procedures from your PCP. HMO