Medica Central Health Plan is an HMO/HMO-POS with a Medicare contract. Enrollment in Medica Central Health Plan depends on contract renewal. Medica Central Health Plan markets under the name Medica. This information is not a complete description of benefits. Call 833-551-0565 (TTY: 711) for more information. You must continue to pay your Medicare Part B premium. Every year, Medicare evaluates plans based on a 5-star rating system.