The same MRI of the same knee, ordered by the same doctor, can cost $380 at a freestanding imaging center and $3,200 at the hospital three miles away. Both are billing for the exact same CPT codeCPT CodeCPT stands for Current Procedural Terminology. It's the five-digit code system, maintained by the American Medical Association, that identifies every medical procedure and service billable to insurance. Every line on a m… Read the full definition → (73721). Neither is doing anything illegal. Welcome to American healthcare pricing.

I have spent years explaining this to employers and members. The short answer is that there is no single price for anything in this system — there are at least three, and often five or six, and which one you pay depends on who you are, what plan you have, and whether anyone bothered to shop.

1. The Three Prices That Coexist for Every Procedure

The chargemaster (list price)

Every hospital maintains a chargemaster — an internal price list for every billable service. It is, essentially, a fiction. Chargemaster prices are set high on purpose because they become the anchor for insurance negotiations and because a small number of self-pay and out-of-networkOut-of-NetworkOut-of-network means a provider has no contract with your health plan. The plan will typically pay something toward the bill (usually at a lower allowed amount and higher coinsuranceCoinsuranceCoinsurance is the percentage of the allowed amount you pay after your deductibleDeductibleA deductible is the dollar amount you pay out of pocket for covered services each plan year before your health plan starts sharing the cost. If your deductible is $3,000, you pay the first $3,000 of allowed charges yours… Read the full definition → is met, up until you hit your out-of-pocket maximum. If your plan is "80/20 after deductible," the plan pays 80% and you pay 20% of every … Read the full definition →), and the provider is generally free … Read the full definition → patients actually get billed at this rate. A knee MRI chargemaster priceChargemasterA chargemaster is the master price list a hospital keeps for every single item and service it can bill for — from a Tylenol tablet to a heart valve replacement. It's the sticker price, not the price anyone actually pays.… Read the full definition → of $4,800 is not unusual. Almost no one pays it, but its existence shapes every other number.

The negotiated (allowed) rate

When a payer (Blue Cross, Aetna, UHC, Cigna) contracts with a hospital, they negotiate a discount off the chargemaster. This is the "allowed amountAllowed AmountThe allowed amount is the maximum dollar figure your health plan will recognize for a covered service. It's the number the plan uses to calculate what it pays and what you owe. Anything the provider bills above the allow… Read the full definition →" you see on your EOB. For that same knee MRI, the allowed rate might be $1,150 at the hospital and $340 at the imaging center — even though the hospital's chargemaster was $4,800 and the imaging center's was $600. The negotiated rateNegotiated RateA negotiated rate is the price a health plan and a provider have agreed to in a written contract. It sits between the hospital's chargemaster (the sticker price) and the cash price (what someone pays with no insurance at… Read the full definition → depends almost entirely on leverage: how much market share the payer has, how much of the hospital's business it represents, and what other hospitals in town are willing to accept.

The cash price

This is what a facility will accept if you pay upfront, no insurance involved. It is often — surprisingly — lower than the negotiated rate. Freestanding surgery centers publish cash prices publicly. Hospitals will quote them if you ask, though usually only if you explicitly say "I'm paying out of pocket today." A knee MRI cash price at a good imaging center in Austin is around $380. Compare that to $1,150 negotiated at the hospital and $4,800 chargemaster.

2. Why the Spread Is 10x for the Exact Same Test

The Health Care Cost Institute's landmark 2019 study found that commercial insurers pay hospitals, on average, 224% of what Medicare pays for the same services. In some markets it hits 340%. A RAND Corporation study in 2024 refined this further, showing that outpatient services average 289% of Medicare across all payers.

Why? Three reasons:

3. Hospital vs. ASC vs. Independent Clinic

The single largest driver of price variation for outpatient procedures is site of service. The same surgeon can perform the exact same colonoscopy in three settings, with three completely different prices:

The difference is the "facility fee." Hospitals add a facility fee on top of the professional (physician) fee. ASCs charge a lower facility fee. Independent offices charge none. CMS has documented this repeatedly — for the exact same CPT code, Medicare pays the HOPD roughly 79% more than the ASC. In commercial markets the gap is often larger.

Worse: when a hospital system acquires an independent physician group, that group's office often gets reclassified as a "hospital outpatient department" overnight — and the same visit that cost $200 now costs $600. This is called "site-of-service arbitrage" and it is one of the biggest drivers of healthcare inflation over the past decade.

4. The CMS Price Transparency Mandate (and Why It Barely Works)

On January 1, 2021, CMS required all U.S. hospitals to publish a machine-readable file (MRF) listing every negotiated rate they have with every payer, plus their gross charges and cash prices, plus a consumer-friendly display of 300 shoppable services. The penalty for non-compliance was $300–$5,500 per day, later raised to as high as $2 million/year for large hospitals.

The good news: the data now exists. TruePrice Care and other pricing engines pull from these files daily.

The bad news: compliance is inconsistent. A 2024 Patient Rights Advocate audit found only 34.5% of hospitals fully compliant. Many publish files that are technically valid but effectively unreadable — coded in ways that make comparison nearly impossible, using non-standard payer names, missing plan tiers, or bundling procedures in ways that obscure the actual per-service cost. Real transparency requires third-party tools to normalize this data.

5. Cash Is Often Cheaper Than Insurance — 47% of the Time

A 2020 Peterson-KFF Health System Tracker analysis of 100 shoppable services found that the cash price beat the average commercial negotiated rate 47% of the time. For imaging alone, cash was cheaper 62% of the time.

This is deeply counterintuitive. You pay for insurance so you don't have to pay cash. But the negotiated rate reflects your insurer's leverage — not the underlying cost. A hospital may accept $380 cash for that MRI (their actual cost plus a modest margin) but the negotiated rate through Blue Cross is $1,150 because that's what the hospital-insurer contract locked in years ago.

The practical implications: if you have a high-deductible planHDHP (High-Deductible Health Plan)An HDHP is a health plan with a deductible above IRS-set minimums ($1,600 individual / $3,200 family for 2024) and an out-of-pocket maximum below IRS-set ceilings ($8,050 / $16,100). Meeting both bars makes the plan "HSA… Read the full definition → and haven't met your deductible, you are literally paying the negotiated rate out of pocket. Cash may be lower. Always ask. See When Paying Cash Is Cheaper Than Using Insurance for the full framework.

6. Prescription Drugs: PBMs Add Another Layer

Retail prescription drug pricing is even more opaque. A Pharmacy Benefit Manager (PBM) sits between your insurer and the pharmacy, negotiating rebates from drug manufacturers and setting formularyFormularyA formulary is your plan's list of covered prescription drugs, usually organized into tiers that determine what you pay. Tier 1 is generics (lowest cost-share), Tier 2 is preferred brand-name drugs, Tier 3 is non-preferr… Read the full definition → tiersDrug Tiers (Tier 1 through Tier 5)Drug tiers are the pricing levels a health plan or PBM assigns to prescription drugs on the formulary. The tier a drug falls into determines the member's copayCopayA copay is a flat dollar amount you pay for a specific service, usually collected at the time of care. A $30 primary care copay, a $75 specialist copay, a $10 generic drug copay. It's the simplest form of cost-sharing — … Read the full definition → or coinsurance at the pharmacy counter, from the lowest-cost… Read the full definition →. Three PBMs control roughly 80% of the U.S. market: Caremark (owned by CVS Health), Express Scripts (owned by Cigna), and OptumRx (owned by UnitedHealth Group).

The PBM's incentive is not always aligned with yours. Rebates from manufacturers are calculated as a percentage of list priceList PriceThe list price of a prescription drug is the manufacturer's publicly stated price before any negotiated discounts, rebates, or patient-assistance programs apply. It's the number you see quoted in pharmaceutical company p… Read the full definition →, so higher list prices generate larger rebates — which flow to the PBM and (some to) the plan. This is why brand-name drugs with high list prices sometimes get better formulary placement than generics or biosimilars with lower list prices.

The Cost Plus Drugs model (Mark Cuban Company) bypasses the PBM entirely: buy the drug wholesale, add a 15% margin plus a fixed dispensing fee, publish the price. For most generics, the Cost Plus price is 60–90% below what a PBM-mediated pharmacy would charge. Same molecule, same manufacturer, different distribution economics.

7. Vertical Integration Is Structural — Not Accidental

The largest health insurers in the U.S. are no longer just insurance companies. UnitedHealth Group owns Optum, which owns 90,000+ employed and affiliated physicians, hundreds of surgery centers, urgent care clinics, home health operations, and the largest PBM in the country. CVS Health owns Aetna (insurer), Caremark (PBM), 9,000+ retail pharmacies, and thousands of MinuteClinic locations. Cigna owns Express Scripts.

When your insurer, your PBM, and your provider are all the same corporate parent, the "negotiated rate" between them is a transfer price — a bookkeeping entry, not a market outcome. Investor returns are extracted at each step: underwriting margin at the insurer, spread pricingSpread PricingSpread pricing is a PBM revenue model where the pharmacy benefit manager charges the plan sponsor one price for a drug and pays the dispensing pharmacy a lower price, keeping the difference. The plan is billed $80, the p… Read the full definition → at the PBM, facility fees at the clinic, dispensing margin at the pharmacy.

This is why the system isn't broken — it was built this way. Every transaction is designed to generate a return for someone, and the patient is the terminal payer for all of them.

8. What This Means Practically for You

Three habits will save you thousands per year:

  1. Always ask for the cash price before scheduling. For any scheduled procedure, imaging test, or elective surgery, call the facility and ask "What is your self-pay priceCash PriceA cash price is what a facility charges when a patient pays directly at the time of service, with no insurance claim filed. It bypasses the entire billing, coding, denial, and collections machine — which is expensive to … Read the full definition → for CPT [code]?" Compare to your negotiated rate on the pricing tool your plan provides (or on TruePrice Care).
  2. Choose ASCs and independent clinics over hospitals for outpatient care. For colonoscopies, orthopedic surgery, imaging, and most procedures, the ASC or independent option is 40–70% cheaper for identical quality outcomes.
  3. Check GoodRx, Cost Plus Drugs, and Amazon Pharmacy on every prescription. If any of them beats your insurance copay — which they frequently do on generics — pay cash. Your out-of-pocket dollars can still count toward your deductible with a cash-claim submission on many plans.

The prices exist. The variation is real. Knowing this is the first step toward not being the person overpaying by 10x.