HMO vs PPO: Which Plan Structure Fits You?

The core difference

An HMO (Health Maintenance Organization) keeps premiums lower by covering in-network care only and routing specialist visits through a primary care doctor who provides referrals. A PPO (Preferred Provider Organization) costs more but lets you see any provider — in or out of network — without referrals.

In short: HMO trades flexibility for lower cost; PPO trades higher cost for flexibility. Both are comprehensive, ACA-compliant coverage when bought on the Marketplace.

How to choose

Choose an HMO if you are comfortable staying in-network with a primary care doctor coordinating your care and you want the lowest premium and predictable copays. Choose a PPO if you want to keep specific specialists, travel often, or value skipping referrals — and you are willing to pay more for that freedom.

Two related structures sit in between: an EPO is like an HMO without referrals, and a POS is like an HMO that covers some out-of-network care. If neither pure option fits, one of these may.

Frequently asked questions

Is a PPO worth the extra cost?

It can be if you value provider choice, travel, or have established specialists. If you are happy in-network with a PCP, an HMO usually saves money.

Do HMOs require referrals?

Typically yes — you need a referral from your primary care doctor to see a specialist, except in emergencies. PPOs and most EPOs do not require referrals.