What are the three main types of health insurance?

For a lot of people who get their health insurance through their employer, it comes down to what options are available. If there is more than one choice, you likely have to decide between an HMO, PPO, EPO or POS option.

https://www.uhc.com/understanding-health-insurance/types-of-health-insurance#:~:text=For%20a%20lot%20of%20people,PPO%2C%20EPO%20or%20POS%20option.