ApexHealth is a Medicare Advantage HMO with a Medicare contract. Enrollment in ApexHealth depends on contract renewal. Out of network/non-contracted providers are under no obligation to treat ApexHealth members, except in emergency situations. Please call our customer service number or see your Evidence of Coverage for more information, including the cost-sharing that applies to out-of-network services. Every year, Medicare evaluates plans based on a 5-star rating system.