Which statement best describes the primary difference between HMO and PPO in terms of network flexibility and referrals?

• A. HMO requires using in-network providers and usually requires primary care physician referrals; PPO offers more network flexibility and does not require referrals but at higher costs for out-of-network care.
• B. PPO requires all services to be in-network and referrals; HMO offers more flexibility.
• C. HMO allows unrestricted access to specialists without referrals but has higher premiums.
• D. PPO restricts to a single network and requires a gatekeeper.

Answer: (A)

The main idea is how much control you have over who you can see and how a doctor is chosen for you. HMOs operate with a closed network and a gatekeeper: you typically must use in-network providers, and you usually need to get a referral from a primary care physician to see a specialist. PPOs, on the other hand, give more freedom to choose providers, allowing in-network or out-of-network options, and you generally don’t need referrals to see specialists, though going out-of-network costs more.

That’s why the best description is that HMOs require using in-network providers and usually require PCP referrals, while PPOs offer more network flexibility and do not require referrals, with higher costs for out-of-network care. The other statements mix up these roles—PPOs aren’t restricted to a single network with a gatekeeper, and HMOs aren’t known for unrestricted specialist access without referrals or for higher premiums as a defining trait.