MaineHealth Maine Medical Center | 27,341 followers on LinkedIn. Maine Medical Center is a complete healthcare resource for the people of greater Portland, the entire state of Maine and Northern New England. With a history dating back to 1864, Maine Medical Center is the state’s largest medical center and the flagship facility of MaineHealth, with 637 beds and more than 7,000 employees. In addition, we have achieved Magnet™ status in recognition of our commitment to the highest standards of nursing excellence.