No Surprises Act IDR Fight at HaloMD: What It Means for Your $400 vs $4,200 MRI Bill

Your doctor orders a knee MRI. Here's the question nobody in Washington is answering for you.

Say your orthopedist wants imaging on that knee that's been bothering you since your last pickup basketball game. You've got a referral, a CPT code (73721, MRI lower extremity without contrast), and zero idea what it's going to cost. Meanwhile, there's a real fight happening in D.C. over the No Surprises Act's arbitration system — and it has almost nothing to do with the number that's about to show up on your bill.

That's the disconnect worth understanding this week. A recent Healthcare Dive interview with Patrick Velliky, a top lobbyist for HaloMD — a company that helps out-of-network providers file Independent Dispute Resolution (IDR) claims — dug into why HaloMD has become a lightning rod. Critics argue the IDR system, meant to settle billing disputes between insurers and out-of-network providers without dragging patients into the middle, is instead being used to push billed charges upward. Velliky's counter-argument: IDR is doing exactly what it was designed to do, and it's keeping patients out of the fight.

Here's the part that matters for you, the person with a referral in hand: the No Surprises Act and IDR only govern out-of-network emergency care and certain ancillary services. It says nothing about what an MRI, colonoscopy, or knee replacement costs when you schedule it yourself, in-network, at a facility of your choosing. That's a totally separate battlefield — and on that battlefield, the only protection you have is checking the price yourself before you book the appointment.

The IDR fight, translated into plain English

If you've never dealt with an EOB (Explanation of Benefits) that made you want to throw your laptop, here's the short version of what IDR does and doesn't do:

• No Surprises Act: Protects you from "balance billing" — being charged the difference between what an out-of-network provider billed and what your insurer paid — in emergency situations and for certain out-of-network specialists at in-network facilities (anesthesiologists, radiologists, etc.).
• IDR: The arbitration process insurers and providers use between themselves to settle what the insurer actually owes when they disagree on a fair price. You're not in the room. You shouldn't be affected either way.
• What it doesn't touch: Elective, scheduled, in-network care — which is most MRIs, most colonoscopies, most outpatient surgeries. For those, the facility's chargemaster rate and your plan's negotiated rate determine what you owe, and neither is required to be handed to you in a way a normal human can read.

We've written before about how the allowed amount on your EOB determines what you actually owe on a surprise ER bill, but for scheduled procedures, there's no arbitration system standing between you and the price. There's only the price itself — and whether you checked it first.

What that knee MRI actually costs, by facility type

Based on Privenox's analysis of CMS fee schedule data covering thousands of MRI, CT, and outpatient procedure line items, alongside hospital price transparency files, the spread for CPT 73721 (knee MRI without contrast) commonly looks like this in a mid-sized metro market:

Facility Type	Typical Cash/Self-Pay Price	Typical Insurance-Negotiated Rate	Typical Hospital Chargemaster Rate
Independent imaging center	$375 – $450	$410 – $600	N/A
Ambulatory/freestanding radiology	$450 – $700	$550 – $950	N/A
Hospital outpatient department	$1,400 – $2,600	$900 – $1,800	$3,200 – $4,800
Hospital-owned physician practice (post-acquisition)	$1,200 – $2,200	$850 – $1,600	$2,900 – $4,400

That's not a typo. The same scan, same magnet strength, frequently the same radiologist reading the images, can run 5 to 10 times more depending purely on which building you walk into. We broke this exact gap down with real chargemaster figures in MRI Bills $4,200 at the Hospital and $400 at the Imaging Center — the IDR fight over out-of-network billing doesn't move a single one of those numbers.

This is the kind of analysis Privenox runs for you — so you don't have to pull chargemaster files and CMS rate data yourself before every appointment.

Why "in-network" doesn't mean "cheap" anymore

Here's where a separate story from this week connects directly to your MRI bill. Healthcare Dive also reported on a survey showing a widening mental health gap between employed and independent physicians — employed doctors reporting worse well-being. Buried in the "why" of that story is the broader trend we track constantly: physician practices are being acquired by hospital systems at a fast clip, and employed doctors report less autonomy over how and where they refer patients.

The billing consequence is direct. When your longtime doctor's independent practice gets bought by the regional hospital system, the same office, same staff, same equipment can start billing under a hospital facility fee — turning a $425 MRI referral into a $1,850 one overnight, simply because of who owns the building now. We modeled this exact scenario in Knee MRI Price Comparison: $425 vs $1,850 After a Hospital Acquisition. If your doctor's practice has changed ownership in the last two years — worth checking — your old assumption about what "getting an MRI at my doctor's building" costs may no longer be true.

Running the numbers: what shopping around is actually worth you

Let's say you're on an ACA marketplace plan. Per Privenox's aca-marketplace-premiums dataset, average deductibles on Silver and Bronze tier plans have climbed toward $4,800-plus in many states for 2026. Here's the out-of-pocket math at three common deductible positions, assuming a 20% coinsurance once the deductible is met:

Scenario: You haven't touched your deductible yet this year

• Hospital outpatient MRI, insurance-negotiated rate $1,500: you owe the full $1,500 (deductible not met)
• Independent imaging center, negotiated rate $500: you owe the full $500
• Difference: $1,000 saved by booking at the imaging center, immediately, no arbitration required.

Scenario: You're $200 short of meeting your deductible

• Hospital MRI at $1,500: you pay $200 to finish the deductible, then 20% coinsurance on the remaining $1,300 = $260. Total owed: $460
• Imaging center at $500: you pay the full $200 remaining deductible, then 20% of $300 = $60. Total owed: $260
• Difference: $200 saved — smaller, but the imaging center still wins.

Scenario: You already met your deductible this year

• Hospital MRI at $1,500: 20% coinsurance = $300
• Imaging center at $500: 20% coinsurance = $100
• Difference: $200 saved, even after the deductible's already been satisfied — because coinsurance is a percentage, and percentages of a smaller number are always smaller.

In every single deductible position, the lower-priced facility wins for you in dollars. The only scenario where it doesn't matter is if you're already at your out-of-pocket maximum for the year — worth checking your EOB history before you decide it's not worth the phone call to compare. You can model this for your specific plan, deductible status, and location at Privenox.

The AI wrinkle nobody's watching yet

One more thread from this week's coverage worth flagging: Healthcare Dive reported that agentic AI adoption in healthcare — including in billing, coding, and prior authorization workflows — is outpacing governance and oversight. Translation: more of your bill, your prior auth decision, and your claim's coding are being touched by automated systems with limited human review before the number reaches you. That's one more reason the burden keeps landing on you to verify the price and the coding yourself rather than assume the system got it right. We've covered how AI-driven prior auth denials and billing errors are already showing up in AI Prior Auth Denied Your $1,200 Procedure — Now the Chargemaster Says You Owe $8,600.

A quieter risk: alternative plans exempt from ACA rules

A separate legal fight is also relevant here. KFF Health News reported on a lawsuit against the Department of Labor that could expand how "employer health plans" are defined — potentially letting more limited, ACA-exempt plans qualify as group coverage. If your plan comes through an arrangement like this rather than a standard ACA marketplace or employer plan, it may carry fewer of the transparency and coverage protections you'd assume apply. That makes checking the actual dollar price before scheduling even more important — you may not have the deductible/coinsurance structure you think you do.

What to actually do before you book that MRI

1. Pull the CMS-required price transparency file for any hospital you're considering — every hospital has had to post one since 2021, though compliance is still spotty. We walk through how to read one in MRI Price Transparency Check: $750 vs $3,900.
2. Call independent imaging centers within 15 miles and ask for the self-pay cash price for your specific CPT code — often cheaper than going through insurance at all if your deductible isn't met.
3. Check whether your doctor's practice has recently been acquired by a hospital system — it changes where the referral defaults to and what it bills under.
4. Confirm your deductible status before assuming insurance makes the price irrelevant — as the math above shows, it rarely does.

None of this requires waiting on Congress, the DOL lawsuit, or the IDR arbitration fight to resolve. The price gap between the $400 imaging center and the $4,200 hospital exists today, in your ZIP code, for the exact procedure your doctor just ordered. Check it at Privenox before you schedule — not after the bill arrives.

Data behind this post

The figures above are computed from the product's own reference tables, last refreshed 2026-04-15:

• 3,060 rows from aca-marketplace-premiums
• 1,080 rows from bls-medical-cpi
• 6,286 rows from census-acs-health-context
• 5,700 rows from cms-fee-schedule
• 31 rows from healthcare-defaults
• 200 rows from kff-insurance-benchmarks

Sources

• Why HaloMD became a target — and what its top lobbyist says critics get wrong — Healthcare Dive
• Outcome of Suit Against Department of Labor Could Boost Skimpy Employer Health Plans — KFF Health News
• Healthcare’s agentic AI boom is outpacing governance: report — Healthcare Dive
• Mental health gap widens between employed and independent physicians: survey — Healthcare Dive
• Listen to the Latest ‘KFF Health News Minute’ — KFF Health News