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Health Insurance Basics4 min read

The top 5 mistakes people make when choosing a health plan

Picking a plan is one of the bigger financial decisions you'll make all year, and most of the regret traces back to the same five errors. Here's each one — and the fix.

Matt Briegel
Matt BriegelFounder & Licensed Broker · Published May 30, 2025 · Reviewed July 22, 2026
The short answer

Most health-plan regret comes from five avoidable errors: shopping on premium alone, skipping the network check, ignoring the drug list, going it alone, and auto-renewing on autopilot. Each one takes minutes to avoid — and the checks below are the same ones we run for every client.

01Shopping on the monthly premium alone

The premium is the number every comparison site prints in the biggest font, so it’s the number most people shop on. But it’s only one piece of what a plan costs you. Deductibles, copays, coinsurance and out-of-network charges are the rest — and a low premium usually means those other numbers run high.

A high-deductible plan can look great in May and hurt in November: one unexpected hospital visit and you’re covering thousands out of pocket before the plan pays much of anything. The fix is to compare plans on your total cost of care — premium plus what you’ll realistically spend on doctor visits, prescriptions and any planned procedures — not on the sticker price alone.

02Assuming your doctors are in the network

No plan covers every doctor and hospital, and people routinely discover their physician or local hospital is out-of-network after they’ve enrolled — when the only options left are switching doctors or paying full price. Out-of-network care can cost several times the in-network rate, or not be covered at all.

Before you pick a plan, check every doctor, specialist and hospital you actually use against that plan’s provider directory. It’s tedious, and directories aren’t always current — which is exactly why we cross-reference them for clients — but it’s the single check that prevents the most painful surprises.

03Ignoring the prescription drug list

Every plan has a formulary — the list of medications it covers, and at what price tier. Most people never open it. If you take anything regularly, especially for a chronic condition, that’s an expensive skip: a drug that isn’t on the list, or sits in a high-cost tier, can mean a copay that wrecks your monthly math — and skipped doses when the price stings.

Before enrolling, check each of your prescriptions against the formulary and note the tier it lands in. If a medication you rely on isn’t covered affordably, that plan probably isn’t your plan, no matter what the premium says.

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04Going it alone

Plan documents are written in jargon, comparison tools show you premiums but bury the trade-offs, and internet forums are full of confident answers about somebody else’s situation. One wrong assumption — about a network, a deductible, a subsidy — can cost thousands.

A licensed broker reads these documents for a living, and the help costs you nothing: brokers are paid a commission by the carrier, and your premium is identical either way. Free expert help with no markup on the price is a rare deal — take it.

05Auto-renewing year after year

Letting last year’s plan roll over is the default, and the default gets expensive. Plans change their prices, networks and drug lists every year — and your life changes too. The plan that fit before the new job, the new baby or the new prescription may fit badly now, and you could be missing better options that didn’t exist when you enrolled.

Put an annual review on the calendar for open enrollment — November 1 to January 15 for marketplace plans — and after big life events like marriage, a birth, a job change or retirement. We run these reviews for clients at no cost, and “you’re already in the right plan” is a common answer. The point is knowing, not switching.

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