Medicare offers many services. Some our better than others. We will briefly discuss the main difference between HMO & PPO plans. HMO stands for health maintenance organization. These plans limit what doctors you can see. The doctors must be with the HMO network. However with a PPO plan, preferred provider organization does not limit your choices. You may see whatever in-network doctor you want without having to get a referral from a primary physician first.
— The Coalition for Medicare Choices (@protectmyMA) April 8, 2019