Overview: Not everyone wants the tight network restrictions of an HMO — PPOs and POS plans offer progressively more provider flexibility, while traditional indemnity plans provide maximum freedom at the highest cost.

Traditional Indemnity (Fee-for-Service) Insurance

Traditional indemnity plans — also called fee-for-service plans — are the historical baseline for health insurance. They have no provider network, no referral requirements, and no gatekeeping. A member can see any licensed physician, specialist, or hospital anywhere without restriction.

The insurer reimburses based on Usual, Customary, and Reasonable (UCR) charges — what it considers the reasonable fee for a service in that geographic area. If a doctor charges more than the UCR, the patient pays the entire excess (known as balance billing). There are no negotiated rates with providers. Members often pay the full bill upfront and then submit claims for reimbursement — a significant administrative burden.

The financial structure typically involves a high deductible, followed by coinsurance (the insurer pays 70–80% of UCR costs, the patient pays 20–30%), with no network discounts or managed care protections. Traditional indemnity plans have largely been displaced by managed care alternatives because of their higher costs and lack of coordination.

Preferred Provider Organizations (PPOs)

A PPO offers a middle ground: substantial provider choice combined with financial incentives to use a contracted network. The insurer contracts with a network of "preferred" providers who agree to accept negotiated, discounted rates. These providers also agree not to balance-bill patients for the difference between their standard fee and the insurer's negotiated rate — a significant consumer protection.

Members are not required to use the network or get referrals to see specialists. However, the financial consequences of going out-of-network are significant:

In-network: lower deductible, lower coinsurance (e.g., 20%), no balance billing, direct claims submission by the provider
Out-of-network: separate and higher deductible, higher coinsurance (e.g., 40%), risk of balance billing, often requires patient to pay upfront and file their own claim

PPOs are the most popular plan type in the employer market because they combine broad choice (no referrals, out-of-network option) with meaningful cost savings for in-network use.

Point-of-Service (POS) Plans

A POS plan is a hybrid that blends HMO and PPO features. At each "point of service" — every time the member needs care — they choose which set of rules to follow.

Acting as an HMO (in-network): The member uses their designated PCP, gets referrals for specialist care, and pays low copays or coinsurance. The insurer handles all paperwork, and costs are minimized.

Acting as a PPO (out-of-network): The member bypasses the PCP, self-refers to any provider, and is covered — but at significantly higher cost sharing. A separate, high out-of-network deductible applies, coinsurance rates are higher (often 50%), and the member may need to pay upfront and file claims. Balance billing risk returns.

One important nuance: in some POS plans, if the PCP provides a referral to an out-of-network specialist, the care may be processed at in-network rates, offering a cost-effective path to seeing an out-of-network provider while avoiding the severe financial penalties of a pure self-referral. This makes the POS plan particularly valuable for members who mostly want in-network coordination but occasionally need specific out-of-network specialists.

POS plans generally have premiums between HMOs (lowest) and PPOs (highest), making them a cost-conscious compromise for members who want the flexibility of occasional out-of-network access without paying full PPO premiums.

Feature	HMO	POS	PPO	Indemnity
PCP required?	Yes	Yes (in-network)	No	No
Referrals required?	Yes	Yes (in-network)	No	No
Out-of-network coverage?	No (except emergency)	Yes, higher cost	Yes, higher cost	Yes, all equal
Network discounts?	Yes	Yes (in-network)	Yes (in-network)	No
Balance billing risk?	None (in-network)	High (if self-referred OON)	High (OON)	High
Typical premium	Lowest	Moderate	Higher	Highest