HEALTH MAINTENANCE ORGANIZATION (HMO) ACT of 1973

Define an HMO and list the four main models of organization.

Also, define a PPO and the major models of organization. 

How do HMO and PPOs differ from each other? Perform an internet search and list three HMO organizations and three PPO organizations. Summarize their mission, vision, and copy/paste each weblink into your summary.

APA format and citation including a conclusion