Understanding Health Plan Network Types: PPO, HMO, and POS

A straightforward guide to the common health insurance network structures and how they impact your care choices and costs.

By Garret Merkley · Explainer · Jul 4, 2026

Branched from What is a Third-Party Administrator (TPA) in Health Plans?

Quick take

HMOs require a primary care provider (PCP) referral for specialists and generally only cover in-network care, offering lower premiums.
PPOs offer more flexibility with choosing doctors and don't always require referrals, but often come with higher premiums and out-of-network costs.
POS plans combine elements of both HMO and PPO, usually offering lower costs for in-network care but allowing out-of-network options with higher costs.
Your network type determines your doctor choices, referral requirements, and out-of-pocket expenses.

Health plan network types, like PPO, HMO, and POS, define how your health insurance plan structures your access to doctors, specialists, and hospitals. They determine which providers you can see, whether you need referrals, and how much you'll pay out-of-pocket for different services.

How Different Networks Shape Your Care

When you choose a health insurance plan, one of the most significant decisions involves its network type. This choice directly impacts your freedom to pick doctors, whether you need a referral to see a specialist, and ultimately, how much you pay for medical services. Each type offers a different balance of flexibility, cost, and control over your healthcare.

Health Maintenance Organization (HMO)

An HMO plan typically requires you to choose a primary care provider (PCP) within its network. Your PCP acts as your central point of contact for all your healthcare needs and must refer you to any specialists you need to see. Except in emergencies, HMOs generally do not cover care from providers outside their network. This structure often results in lower monthly premiums and predictable co-payments, but with less flexibility in choosing your doctors.

Preferred Provider Organization (PPO)

PPO plans offer more flexibility than HMOs. You usually don't need to choose a PCP, and you can see specialists without a referral. PPOs cover care from both in-network and out-of-network providers, though you'll pay significantly less if you choose doctors and hospitals within the plan's preferred network. This freedom comes with higher monthly premiums and potentially higher out-of-pocket costs, especially if you frequently use out-of-network services.

Point of Service (POS)

A POS plan is a hybrid, combining features of both HMOs and PPOs. Like an HMO, you might be required to choose a PCP and get referrals for specialists to receive the highest level of coverage. However, similar to a PPO, a POS plan also allows you to seek care outside the network without a referral, albeit at a higher cost to you. This structure offers a middle ground, providing some flexibility while still encouraging in-network care for cost savings.

Feature	HMO	PPO	POS
Primary Care Provider (PCP) Required?	Yes	No	Often (for best savings)
Referral for Specialists?	Yes	No	Often (for best savings)
Out-of-Network Coverage?	No (except emergencies)	Yes (higher cost)	Yes (higher cost)
Monthly Premiums (Generally)	Lower	Higher	Moderate
Flexibility/Choice of Doctors	Limited (in-network only)	High	Moderate

Understanding these network types is crucial because it directly impacts your healthcare experience and budget. If you prioritize lower monthly costs and don't mind coordinating care through a single doctor, an HMO or POS might be a good fit. If you value the freedom to choose any doctor or specialist without referrals and are willing to pay more for that flexibility, a PPO could be better. Your choice should align with your health needs, financial situation, and how you prefer to manage your medical care.

Can I change my network type after I enroll?

Generally, you can only change your health plan, including its network type, during your employer's annual open enrollment period or if you experience a qualifying life event, such as marriage, birth of a child, or loss of other coverage.

What happens if I see an out-of-network doctor with an HMO?

With an HMO, if you see an out-of-network doctor for non-emergency care, your plan typically won't cover any of the costs, leaving you responsible for the entire bill. Always confirm a provider's network status before your visit.

Is one network type always better than the others?

No, there isn't a universally "best" network type. The ideal choice depends on your individual circumstances: your budget, how often you see specialists, whether you have preferred doctors, and your comfort with managing referrals.

How do I find out which doctors are in my plan's network?

Most health insurance companies provide an online provider directory on their website where you can search for in-network doctors, specialists, and facilities by name, specialty, or location. You can also call the member services number on your insurance card.