In McKinney, Texas, two hospitals sit a few miles apart. For a knee replacement, one of them — Methodist McKinney Hospital — puts $44,077 on the bill. The other — Medical City McKinney — puts $294,654. Same operation, same town, same year, 6.7 times the sticker price. Run the numbers for a hip replacement at those exact two hospitals and the pattern repeats almost perfectly: $37,449 versus $286,907, a 7.7x gap.
These are real figures from Medicare's hospital charge data for fiscal year 2023 — the same dataset behind every procedure page on this site. And the McKinney example isn't a fluke. Across the country, the biggest single driver of what a surgery bill says isn't your state, your insurer, or even the procedure. It's which building you walk into. This is the price gap almost nobody talks about, because it hides inside a single city where you'd assume prices are basically the same.
Here's what that gap actually is, why it gets so large, and — the part that matters — when it's something you can do anything about.
The same operation, two prices, one city
Cost comparisons usually run state by state: California versus Mississippi, that kind of thing. That's useful, but you can't move states to save on a knee. The more actionable question is narrower: within my own metro, how much does the hospital I choose change the bill?
We looked at every U.S. metro with at least two full-service hospitals reporting the same operation to Medicare (surgery centers excluded, so this is hospital-versus-hospital). The typical spread is real but moderate: in the median metro, the most expensive hospital's billed charge runs about 1.5 to 1.8 times the cheapest one for the same procedure. In a quarter of metros it's 2x or more. The eye-popping 6-to-9x cases are the tail of that distribution, not the average — but the tail is not rare, and it's where the real money hides:
- Knee replacement, McKinney TX: Methodist McKinney $44,077 vs. Medical City McKinney $294,654 — 6.7x. Both hospitals reported hundreds of Medicare cases, so neither number is a small-sample quirk.
- Hip replacement, same two McKinney hospitals: $37,449 vs. $286,907 — 7.7x. The consistency across two different operations is the tell: this is about the hospital's pricing, not the surgery.
- Heart bypass, Wichita KS: Kansas Heart Hospital $69,410 vs. Wesley Medical Center $639,696 — 9.2x.
Every figure above is a gross “chargemaster” charge — the hospital's list price before any insurance discount, financial assistance, or negotiation. It is not what most patients pay. Keep that label in mind; it does a lot of work below.
Why the gap gets this big
Two things are going on, and it's worth separating them honestly.
First, part of the gap is real structural difference. In each of these pairs, the cheaper hospital is a physician-owned specialty facility and the pricier one is a full-service acute-care hospital. Methodist McKinney is a physician joint-venture hospital; Medical City McKinney is an HCA hospital with a full emergency department, ICU, and a trauma center. Kansas Heart Hospital does cardiovascular work almost exclusively; Wesley Medical Center is an HCA Level I trauma center. A hospital running a 24/7 ER, intensive care, and absorbing uncompensated emergency care carries overhead that a focused specialty hospital simply doesn't. Some of the price gap reflects that.
But structure can't explain a 6.7x gap. The clearest evidence is what Medicare actually paid. Because Medicare reimburses inpatient surgery through a fixed formula tied to the diagnosis group (adjusted for local wages and a hospital's teaching and safety-net role), the two McKinney hospitals were paid almost the same for that knee replacement — roughly $10,400 and $11,400. That near-match doesn't prove the two operations cost the hospitals the same to deliver; it proves the program that pays for most of these surgeries assigned them nearly identical value. The 6.7x difference lives entirely in what each hospital chose to write on the bill. As we explain in what a hospital chargemaster actually is, that list price is set by each hospital and is mostly a negotiating instrument for commercial insurance contracts — not a readout of cost or quality.
One case-mix caveat: a full-service hospital may treat sicker patients for the same procedure code, which can nudge its average charge up. That's a real confound at the margins. It is not a 6.7x confound.
What the billed number means for you
Whether that gap touches your wallet depends entirely on how you're paying.
If you have insurance, the chargemaster number is mostly noise. You pay your plan's negotiated rate up to your out-of-pocket maximum, and the sticker price scrolls past on the statement without ever being what you owe. We walk through that gap between billed and collected in what surgery actually costs. For you, the hospital-choice question is about network status and quality far more than the chargemaster.
If you're uninsured or paying cash, the billed number is your starting line — and this is where hospital choice can genuinely swing what you owe. The initial bill for an uninsured patient is typically generated at those gross chargemaster rates, and discounts are applied afterward. But “afterward” is uneven, and knowing your rights changes the math:
- At non-profit hospitals, IRS rules (Section 501(r)) cap what a financial-assistance-eligible patient can be charged at the “amounts generally billed” to insured patients — roughly the negotiated rate, not the sticker. But that protection only kicks in if you qualify and apply. Many for-profit hospitals (including HCA facilities like the McKinney and Wichita examples above) aren't bound by 501(r) at all.
- For any scheduled procedure, the No Surprises Act entitles a self-pay patient to a written good faith estimate of expected charges in advance.
- Under the federal Hospital Price Transparency rule, hospitals must post a discounted cash price for their services. That's the number to ask for — and to compare across hospitals in your area.
So the practical takeaway for a self-pay patient isn't “the high-chargemaster hospital will bill you 6.7x more.” It's this: your final bill starts from that list price and gets negotiated down from there, and the patient who walks into the $294,654 hospital without asking for the cash price, the good faith estimate, or financial assistance is starting from a much worse anchor than the one who walked across town.
How to actually use this
The honest limit first: you often can't just pick a hospital. Surgeons operate where they have privileges, so choosing a hospital usually means choosing (or being referred to) a surgeon who works there. And in a true emergency — an inflamed appendix, say — there's no shopping at all; you go to the nearest capable ER. Anyone telling you to comparison-shop your way out of an emergency surgery is selling something.
But for a planned procedure — a knee replacement at $30,000–$60,000 in real terms, a hip replacement, an elective bypass — the hospital is a variable, and here's how to work it:
- Ask your surgeon where they operate. Many admit at more than one facility. If one is a specialty hospital and one is a big medical center, ask whether both are appropriate for your case.
- Request the discounted cash price and a good faith estimate from each hospital in play — it's your legal right, and it converts the abstract chargemaster into a real number.
- If you're uninsured, ask about financial assistance before the procedure, and confirm whether the hospital is non-profit (501(r)-bound) or for-profit. The answer changes your protection.
- Then bring quality back in. Cost is one input, not the whole decision. For a complex operation, a hospital's surgical volume, your surgeon's experience, and the presence of an ICU and complication-management capability can matter more than the price — and are sometimes exactly what the pricier full-service hospital is charging for. The goal isn't the cheapest hospital; it's not overpaying for the same care by default.
If a bill has already landed and it's steep, that's a different playbook — see how to negotiate a surgery bill and how hospital charity care works. The chargemaster is where the negotiation starts, not where it ends.
Frequently asked questions
Does a higher billed price mean better surgery?
No. In our data the price gap doesn't track quality — Medicare paid the cheap and expensive hospitals nearly the same for the identical procedure. Chargemaster prices are set for insurance-contract reasons, not to signal quality. Judge quality on surgical volume, outcomes, and your surgeon, not the sticker.
Will I actually be billed the higher chargemaster amount?
Only if you're uninsured, don't pursue a discount, and go to a hospital that isn't bound by non-profit charity-care rules. Insured patients pay negotiated rates. Self-pay patients can ask for the discounted cash price, a good faith estimate, and financial assistance — all of which pull the final number well below the list price.
Why does Medicare pay both hospitals about the same when they bill so differently?
Medicare doesn't pay off the chargemaster. It pays a fixed amount per diagnosis group, adjusted for local wages and a hospital's teaching and safety-net status. So two hospitals doing the same operation in the same area get reimbursed similarly no matter what their list price says — which is exactly why the billed gap is a pricing choice, not a cost difference.
Can I really choose which hospital does my surgery?
For planned procedures, often yes — but it's tied to your surgeon's privileges, so it's a conversation to have with your surgeon, not a solo decision. For emergencies, no. Use the leverage where you have it.
Data source: CMS Medicare Provider Utilization and Payment Data (Inpatient and Outpatient, FY2023). Billed figures are gross hospital chargemaster charges and match the “Real Hospital Charges” tables on this site's procedure pages. They are not what insured or most self-pay patients ultimately pay.