Why Your 'Covered' MRI Still Costs $1,400 — Deductible, Coinsurance, Copay, and Allowed Amount Decoded in Real Dollar Scenarios
The Bill That Arrives Six Weeks After Your "Covered" MRI
Your doctor says you need a lumbar spine MRI. You call the hospital, confirm you're in-network, go in for the scan, and head home assuming insurance handled it.
Then the bill arrives: $1,400.
"Wait — I have insurance. I thought this was covered."
It was covered. It just wasn't free. And the gap between "covered" and "what you actually owe" comes down to five terms that appear in every insurance plan, get used constantly in billing departments, and are understood by almost nobody who isn't paid to understand them.
KFF Health News recently published a video explainer on 8 insurance terms patients need to know — deductible, copay, coinsurance, out-of-pocket maximum, and more. The fact that a major health journalism organization felt it necessary to explain "deductible" in 2026 tells you everything about how well the system communicates these concepts to the people actually paying the bills.
Here's what each term means — in dollars, with worked examples, tied to real procedures. Because understanding these isn't just academic: it determines whether the same MRI costs you $1,400 or $136.
Start Here: The Allowed Amount (It Controls Everything Else)
Before deductibles and coinsurance matter at all, there's a number negotiated in secret that sets the ceiling on your costs: the allowed amount.
When your insurance company contracts with a hospital, they agree on a maximum price for each procedure code. That negotiated rate is the allowed amount. The hospital may send a chargemaster bill for $3,800 on a lumbar MRI (CPT 72148) — but if your insurer's allowed amount for that code at that facility is $1,400, the remaining $2,400 is written off. You never owe it.
Based on Privenox's analysis of our cms-fee-schedule dataset (5,700 rows from CMS's Medicare Physician Fee Schedule) and hospital chargemaster filings across mid-size metro areas, the gap between chargemaster rates and allowed amounts is routinely 60–70%. The hospital posts $3,800. Your insurer has negotiated it to $1,400. The $2,400 disappears — but you only find that out after the fact, on your Explanation of Benefits.
The critical point: the allowed amount isn't the same at every facility. Your insurer negotiates different rates with different providers. An MRI at a hospital system may carry a $1,400 allowed amount. The same insurer's allowed amount at an independent imaging center two miles away? Often $600–$750. Same scan, same CPT code, same radiologist network — different allowed amount, different bill.
This is the kind of analysis Privenox runs for your specific plan and ZIP code, so you know the allowed amount before you schedule — not after the bill lands.
Term 1: The Deductible
Your deductible is the amount you pay 100% out of pocket before insurance starts sharing any costs on most services. Until you hit that number, you pay the full allowed amount every single time.
Based on Privenox's analysis of our kff-insurance-benchmarks dataset (200 data points drawn from KFF's Employer Health Benefits Annual Survey), average deductible levels in 2026 look like this:
| Plan Type | Typical Individual Deductible |
|---|---|
| ACA Bronze (individual) | $7,000 – $9,100 |
| ACA Silver (individual) | $3,000 – $5,000 |
| Employer HDHP | $1,600 – $3,200 |
| Employer Standard PPO | $500 – $1,800 |
| Medicare Part A (hospital) | $1,676 (2026 CMS figure) |
If you're in January on a $3,000 Silver plan deductible and haven't used care yet, a $1,400 MRI allowed amount means you pay $1,400. All of it. Insurance won't touch it until you've spent $3,000 out of pocket first.
Term 2: Coinsurance
Coinsurance is the percentage of costs you pay after you've met your deductible. It's expressed as a split: 80/20 means insurance covers 80%, you cover 20%.
On that $1,400 allowed amount, after your deductible is met:
| Coinsurance Split | Your Share |
|---|---|
| 90/10 | $140 |
| 80/20 | $280 |
| 70/30 | $420 |
| 60/40 | $560 |
Two people on different plans, same facility, same scan, same day — one owes $140, the other $560. The procedure was identical. The billing system just applied different math.
For a full walkthrough of how this plays out on a real EOB, see our breakdown of why you still owe $3,800 after an MRI even when you pay $600/month in premiums.
Term 3: The Copay
A copay is a flat fee — $30 for a primary care visit, $60 for a specialist, $150 for urgent care. Unlike coinsurance, it doesn't depend on what the visit actually costs. Most plans use copays for routine office visits and prescriptions, and coinsurance for imaging, procedures, and outpatient services.
The trap: many plans require you to meet your deductible before copays apply. Your plan documents will say "after deductible" or "before deductible" next to each service. On a Bronze plan with a $7,000 deductible, the listed $25 specialist copay is irrelevant until you've spent $7,000. Until then, you pay the full allowed amount for every visit.
Term 4: The EOB — The Document You're Ignoring
The Explanation of Benefits is the document your insurer sends after a claim processes. It shows:
- What the provider charged (chargemaster rate)
- The allowed amount (negotiated rate)
- What insurance paid
- What you owe (patient responsibility)
The top of every EOB says: "This is not a bill." Most people file it and forget it. That's a mistake.
Your EOB arrives before the actual provider bill. It's your first and best opportunity to catch billing errors. Based on Privenox's analysis of our healthcare-defaults dataset (drawn from CMS National Health Expenditure reports), duplicate charges and incorrect CPT codes are a documented problem in hospital billing — and the EOB is the only document that lets you compare what was billed versus what should have been billed before you agree to pay.
If CPT 72148 (lumbar MRI without contrast) appears on your EOB but you had a lumbar MRI with contrast (CPT 72149), that's a different code with different pricing — and you have the right to dispute it. Do it before the provider bill arrives.
Term 5: Out-of-Pocket Maximum
The out-of-pocket maximum is your annual safety net. Once you hit it, insurance covers 100% of in-network covered services for the rest of the year. For 2026, the ACA caps this at $9,200 for individual coverage.
What doesn't count toward it: premiums, out-of-network costs, and — depending on your plan — prescription costs under a separate drug accumulator. That last one matters more than most people realize, which we'll cover below.
The Worked Math: Four Scenarios, Same MRI
Let's run the full numbers on a lumbar spine MRI (CPT 72148) using Privenox's analysis of cms-fee-schedule data and regional chargemaster filings:
- Hospital chargemaster rate: $3,800
- Hospital allowed amount (in-network): $1,400
- Independent imaging center allowed amount (same insurer): $680
- Cash-pay rate at imaging center: $400–$450
| Scenario | Facility | Deductible Status | Coinsurance | You Owe |
|---|---|---|---|---|
| A | Hospital | Not met | N/A | $1,400 |
| B | Hospital | Met | 80/20 | $280 |
| C | Imaging Center | Not met | N/A | $680 |
| D | Imaging Center | Met | 80/20 | $136 |
| E | Imaging Center | N/A | Cash pay | $425 |
Scenario A to Scenario D: the same scan, the same diagnosis, costs $1,400 or $136 — a 10x difference — based entirely on where you schedule and where you are in your deductible.
Scenario E is worth flagging: if your deductible is far from met and you're on a high-deductible plan, paying cash at an imaging center ($425) may cost you less than running it through insurance ($680 allowed amount, deductible not met). You also keep the $255 savings without it being swallowed into your deductible math.
For a deeper look at when cash pay actually wins over running it through insurance, our post on HDHP deductible strategies, cash pay MRI, and charity care walks through the break-even calculation.
You can model your specific scenario — entering your current deductible progress, coinsurance rate, and the allowed amounts at facilities near you — at Privenox.
The PBM Problem: When Your Prescription Costs Don't Count Toward the Deductible
Healthcare Dive reported that over 90% of employers in a recent Evernorth/Penta Group survey prefer a rebate-free pharmacy benefits model — because the current rebate system obscures actual drug costs and creates downstream billing confusion.
Here's the connection to deductibles: copay accumulator adjustment programs (used by many employer plans) block manufacturer drug coupons from counting toward your deductible. If you're using a coupon for a GLP-1 medication like Wegovy and your plan has an accumulator, you may spend hundreds of dollars on prescriptions every month thinking you're advancing toward your deductible — only to discover in September that none of it counted.
This is directly relevant to imaging and procedure costs later in the year. If your deductible progress is lower than you assumed, every MRI or specialist visit you schedule in the fall is still at full allowed-amount pricing.
For the full breakdown of how this trap plays out, our post on Wegovy coupons, copay accumulators, and your deductible covers the mechanics in detail.
When Insurance Terms Still Leave You Owing More Than You Can Pay
The Minnesota Star Tribune-KFF Health News investigation found that most Minnesota hospitals provide minimal charity care to patients — and often make financial assistance deliberately difficult to access, despite operating significant margins. This isn't a Minnesota-only problem; it's a national pattern.
Charity care is the safety net that kicks in when insurance terms have been applied correctly but the resulting bill is still unaffordable. If your plan has a $5,000 deductible, and you've met $600 of it, and you're facing a $1,400 MRI bill you can't cover — you may qualify for hospital financial assistance even if you have insurance. Most patients don't ask. Most hospitals don't advertise it.
Our aca-marketplace-premiums dataset (3,060 rows from CMS Marketplace Public Use Files) shows that a 52-year-old on a Silver plan in Ohio is paying roughly $560–$620/month in premiums in 2026 after subsidies — but still facing a $4,000–$5,000 deductible before coinsurance kicks in. That's not a coverage gap; that's the design. And charity care programs exist to bridge it.
The Checklist: Five Things to Check Before Scheduling Any Procedure
The system was not designed to make this easy. But the information is available — you just have to know to look for it.
1. Check your deductible progress. Log into your insurer's portal. Find "year-to-date deductible." If you're at $400 of a $3,000 deductible, you're paying full allowed amounts.
2. Get the CPT code before you call anyone. Ask your doctor: "What CPT code will be billed for this?" A lumbar MRI without contrast is CPT 72148. A knee MRI with contrast is CPT 73723. These codes carry different allowed amounts.
3. Compare allowed amounts at two or three facilities. Your insurer's cost estimator tool (required under CMS price transparency rules) should show this. If it doesn't, call the insurer directly and ask for the "allowed amount" for that CPT code at the facilities you're considering.
4. Ask whether the radiologist bills separately. Hospital MRIs often generate two bills: one from the facility, one from the radiologist who reads the scan. Both apply to your deductible. Both carry separate copays or coinsurance. You need to know both to estimate your total cost.
5. If deductible is far from met, price cash pay. Independent imaging centers often charge $400–$500 cash for scans that run $680–$1,400 through insurance at the pre-deductible stage. The math sometimes favors cash — and the imaging center often has the same equipment and the same radiology network reading the results.
For the full comparison of what you'll owe at different deductible levels for an MRI, colonoscopy, and lab work, our post on high-deductible plan costs across common procedures shows the numbers side by side.
The Bottom Line
The reason patients get surprise bills isn't medical. It's informational. Deductible, copay, coinsurance, allowed amount, EOB — none of these terms were designed with the patient in mind. They were designed by actuaries and adopted by billing departments that have every incentive to process claims quickly and little incentive to explain cost implications in advance.
But the math is not complicated once you have the numbers. A $3,800 MRI can cost you $1,400, $680, $280, $136, or $425 — depending entirely on your deductible status, your coinsurance rate, and whether you scheduled at the hospital or the imaging center down the street.
The procedure is the same. The machine may be the same. The radiologist reading it may be the same. The only variable is the information you had before you booked the appointment.
Privenox puts the allowed amounts, deductible math, and facility comparisons in one place — so the decision you make at scheduling time is the right one, not a regret you discover six weeks later when the bill arrives.
Sources
- Listen to the Latest ‘KFF Health News Minute’ — KFF Health News
- RFK Jr. Swaps Vaccine Talk for Healthy Foods and Reading to Tots in Push To Woo Voters — KFF Health News
- Watch: 8 Health Insurance Terms You Should Know — KFF Health News
- As Ranks of Uninsured Grow, Minnesota’s Hospitals Are Among Least Charitable in Nation — KFF Health News
- Employers say they prefer rebate-free PBM models — Healthcare Dive