Neurosurgeon surprise bills occur when patients receive emergency or scheduled neurosurgical care from an out-of-network provider without being told, or cannot control which surgeons assist during a procedure, and face steep balance bills after insurance pays its share. The New York Department of Financial Services found neurosurgery generated the largest dollar gaps in surprise bills: the average neurosurgery bill was $22,159, but insurers paid only $8,276 on average, leaving a gap of $13,883 per case. Neurosurgery and orthopedic surgery together accounted for roughly half of all large out-of-network bills reported by insurers. The disparity has become a chronic problem because neurosurgery is often performed in hospital settings where patients cannot choose surgeons in advance and cannot negotiate rates.
Table of Contents
- How Large Are Neurosurgeon Surprise Bills?
- What the No Surprises Act Does (and Does Not)
- How the IDR Process Has Changed the Game
- What You Can Do Before and After Surgery
- When the Balance Bill Is Legal
- Frequently Asked Questions
How Large Are Neurosurgeon Surprise Bills?
The gaps in neurosurgery are extreme. One neurosurgeon billed $159,000 for an emergency procedure that Medicare reimburses at $8,500—a markup of nearly 19 times the standard rate. This represents an outlier case, but it illustrates the absence of pricing constraints in out-of-network neurosurgery. The typical surprise bill—a $13,883 gap on top of insurance payment—can still wipe out savings or trigger medical debt. Most neurosurgery patients undergoing emergency procedures have no time to verify whether their surgeon is in-network and no ability to shop for an alternative.
What the No Surprises Act Does (and Does Not)
The No Surprises Act, effective in 2022, bans balance billing for out-of-network emergency care and scheduled procedures when the provider has not disclosed out-of-network status to the patient or when the patient did not consent in writing. For emergency neurosurgery, the law prohibits balance bills automatically. For scheduled neurosurgery, the hospital must notify the patient in writing that an out-of-network surgeon will participate.
The catch: the law does not set fees for out-of-network care. It only forbids the provider from billing the patient the difference between what they charge and what insurance pays. Providers can still bill insurance at high rates, and insurance companies can dispute those charges through a process called Independent Dispute Resolution (IDR).
How the IDR Process Has Changed the Game
When insurance refuses a provider's bill as excessive, either party can file an IDR dispute to have the amount settled by an independent arbiter. In the fourth quarter of 2024, surgery and neurology procedure disputes showed median awards of 13 times the qualifying payment amount—the lowest amount at which the arbitrator considers a dispute. This means that even though the IDR process is supposed to find a fair middle ground, it has consistently sided with high provider bills.
Through the end of 2025, 4.8 million total disputes had been filed—far exceeding the federal estimate of 17,000 annual disputes. Assistant surgeons and surgeons filed 76% of all disputes in 2025 and prevailed in 85% of cases, indicating the law has shifted leverage toward provider billing rather than protecting patients. One assistant surgeon received $50,456 through IDR for a prostate removal, while the in-network surgeon was paid only $1,843 for the same procedure.
What You Can Do Before and After Surgery
Before scheduled neurosurgery, obtain written confirmation from the hospital that all surgeons, including assistants, are in-network. Ask your surgeon's office directly whether they participate in your insurance plan and obtain this in writing. Emergency cases offer no opportunity to verify in advance, but you retain the right to dispute charges after the fact. If you receive a surprise neurosurgeon bill, verify that the provider disclosed their out-of-network status in writing before the procedure.
If not, the balance bill may be illegal under the No Surprises Act. Contact your insurance company to report the balance bill and ask whether they will dispute it with the provider. If the dispute goes to IDR, the process is handled by your insurer, not by you directly—your role is to provide documentation that you did not consent to out-of-network care.
When the Balance Bill Is Legal
Surprise bills become harder to challenge if the hospital did provide written notice that the neurosurgeon was out-of-network and you signed a consent form agreeing to that arrangement. In scheduled cases, hospitals are required to give this notice in a specific format; verify that the notice you received meets legal requirements (dated, specific about which surgeons, and separate from the general consent form). If the hospital satisfied the notice requirement and you did not object, you may not be protected from balance bills under the No Surprises Act, though you can still dispute the amount through your insurer.
Frequently Asked Questions
Can I be balance-billed for a neurosurgeon's assistant?
Yes, if the assistant surgeon was not disclosed in writing before the procedure. The No Surprises Act applies to any provider, including assistants, but only if the patient did not receive written advance notice of their out-of-network status.
What if I signed a consent form for out-of-network neurosurgery?
A general consent to surgery is not the same as written consent to out-of-network billing. The hospital must provide a separate written notice, dated and specific about which providers are out-of-network. Check whether your notice meets this standard.
How long do I have to dispute a neurosurgeon surprise bill?
Your insurance company typically has 120 days to dispute the charge with the provider. Contact your insurer immediately after receiving a surprise bill so they can begin their review.