A surgeon is a defendant. In a deposition room, another surgeon is explaining to attorneys what the standard of care required, and whether the defendant met it.
The defendant looks at the expert's curriculum vitae and notices something. This person is board certified in the right specialty. They trained well. They have published.
They have not performed this operation in nine years.
There is no mechanism, anywhere in the system, that would have surfaced that fact before this moment. The attorney who retained the expert did not check. The broker who supplied the name does not track it. No court rule requires it. And the professional societies, which do have grievance processes, will only look at this retrospectively, after the testimony, if someone files a complaint.
This is medical expert testimony: a form of quasi-judicial medical practice performed almost entirely outside the accountability structures the profession applies to everything else it does.
The market as it works
The mechanics are straightforward and largely invisible to physicians who have never done it.
An attorney needs a medical expert. They contact a referral agency, which maintains a private roster. The agency searches its roster and forwards a set of curricula vitae. The attorney selects. The expert negotiates a rate, frequently through the broker, and is paid through the broker with a markup the physician typically cannot see.
Physicians enter the market the same way in reverse: by responding to broker recruitment emails, or by being recommended by a colleague who already does the work.
Note what is not part of this process at any point:
- Nobody verifies current practice. Whether the expert actually performs the procedure at issue today, and at what volume, is not checked by anyone.
- Nobody sees the testimony history. How often this expert has testified, and for which side, is not systematically available.
- Nobody sees the rate distribution. Neither the physician setting a rate nor the attorney evaluating one has a benchmark.
- The physician cannot evaluate the case or the attorney. They are agreeing to work with a party they know nothing about, on a case whose merit they cannot assess in advance.
A Journal of Bone and Joint Surgery analysis stated the position plainly: expert witnesses "are recruited and compensated without established standards."
The credential asymmetry is measurable
The most useful research here converts a familiar accusation into a measurement.
Both sides of malpractice litigation habitually accuse the other's experts of being hired guns. The JBJS study examined 306 orthopedic malpractice expert witnesses identified between 2013 and 2017 and compared plaintiff-side and defense-side experts:
- Years of experience: 36 for plaintiff experts, 31 for defense.
- Academic appointment: 26 percent of plaintiff experts, 43 percent of defense.
- h-index: 6.6 for plaintiff experts, 9.1 for defense.
The pattern is consistent: plaintiff experts skew older and more experienced clinically, defense experts skew more academic and more published.
That is a genuinely interesting finding, and it does not straightforwardly support either side's caricature. What it does establish is that the two pools differ systematically, which means the composition of expert testimony is being shaped by something other than who is best qualified to opine on a given case.
And it raises the question the whole system avoids: which of those attributes actually predicts a reliable opinion about whether care met the standard? Years in practice? Publications? Or the thing neither variable captures, which is whether this person does this operation now, at volume?
The only accountability mechanism runs almost entirely one way
Professional societies do have processes for policing testimony. Understanding how they operate is essential.
From an Annals of Surgery analysis of complaints to the American Association of Neurological Surgeons Professional Conduct Committee:
- 40 of 59 complaints (68 percent) resulted in sanction.
- 57 of the 59 complaints targeted plaintiff-side experts.
A more recent Surgical Neurology International analysis found the pattern persisting and intensifying:
- Complaints rose from about 2 per year to 9.25 per year after 2003.
- 28 of 29 grievances filed between 2014 and 2022 targeted patient-side experts.
The authors of that second analysis characterized the process as functioning as "a mechanism to intimidate neurosurgeons from testifying against defendant neurosurgeons."
That is a strong claim from within the specialty's own literature, and the numbers behind it are difficult to explain any other way. If the grievance process were assessing testimony quality, one would expect complaints distributed across both sides, since both sides produce testimony and neither has a monopoly on overreach.
A 57-to-2 distribution is not a quality assurance process. It is a directional one.
There is a further problem: the mechanism is entirely retrospective and punitive. It operates after testimony has been given, after a case has resolved, when a sanction cannot improve the reliability of what a jury already heard.
And coverage is thin. A Neurosurgery analysis found that only 10 of 26 spine surgery professional societies had publicly available expert witness guidelines at all.
The physician's side of the market is opaque too
It is worth noting that this market fails physicians as well, in ways that keep good experts out.
Rate opacity. Community-maintained resources indicate most physicians set expert witness rates between $300 and $800 per hour, with outliers in both directions. The main commercial fee survey covers over 1,600 expert witnesses across more than 250 specialty areas, and sits behind a paid report. A physician setting a rate for the first time is guessing.
Reputational risk with no upside. Given the grievance data, a physician considering plaintiff-side work is weighing a documented risk of professional complaint. Many decline for that reason alone, which selects the pool further.
No way to verify the counterparty. A physician agreeing to review a case cannot easily assess whether the attorney is reputable or whether the case has merit.
And no way to signal quality. An expert who does the work carefully, testifies rarely, maintains current practice, and turns down cases without merit has no mechanism to distinguish themselves from someone who does not.
The market's structure therefore selects against exactly the physicians it most needs: currently practising, high-volume, careful clinicians who will testify only when the case warrants it.
The supply nobody is organizing
There is an obvious and largely unused source of high-quality experts.
Retired and semi-retired clinicians have the deepest accumulated experience, the fewest employer constraints on outside work, no institutional exclusivity clauses, time available, and no competitive relationship with anyone in the case.
They are also, as this series has covered, invisible to every discovery mechanism the moment their institutional affiliation lapses.
There is one honest complication that must be stated: for testimony specifically, currency of practice is a legitimate qualification question. A retired surgeon opining on a technique that has changed since they stopped operating is a real concern, and opposing counsel will raise it.
Which is precisely why a system that recorded dated practice history would help rather than hurt this population. A retired expert whose record shows they performed the procedure at volume until three years ago, stated openly and verifiably, is in a far stronger position than one whose currency is simply unexamined until cross-examination.
Transparency about recency is what would let genuinely qualified retired clinicians participate honestly.
What would actually work
The failure of the grievance approach points clearly toward the alternative.
Prospective disclosure instead of retrospective sanction. An expert who publishes, under verified identity, their testimony count, plaintiff-defense ratio, current procedure volume with dates, and rate is more accountable than any post-hoc committee, because the information arrives before the testimony rather than after.
Verified current practice, not just licensure. This is the single most decision-relevant fact and the one nobody checks. Board certification is a fact about an examination. Whether you do this operation now is a fact about this year.
Peer verification of currency. Colleagues can confirm what a physician actually does, which is exactly the fact a broker never checks and a CV cannot establish.
Symmetric by design. Any mechanism that applies to plaintiff experts and not defense experts reproduces the existing directional failure. The disclosure standard has to be identical or it is worthless.
Rate transparency. Publishing realized rates by specialty and activity type would help physicians price honestly and help attorneys budget, and it threatens only the intermediaries.
And hard guardrails. No case materials or patient data should pass through any matching infrastructure. No opinion should be formed inside it. Employer exclusivity terms should be checked at intake. The function is introduction plus disclosure, and it should stop there.
What you can do now
If you do or might do expert work
Publish your own record. Cases reviewed, testimony given, plaintiff-defense split, current procedure volume with dates. Voluntarily, on your own terms. It is your strongest defense against a hired-gun characterization and it does not exist for anyone else.
Know the grievance landscape in your specialty. Given the documented one-directional pattern in at least one specialty, this is a real professional consideration and physicians should enter the market informed rather than surprised.
Set your rate against something. Community-reported ranges of $300 to $800 an hour exist. Guessing without any reference is how the market's information asymmetry extracts value from you.
Decline cases outside your current practice. This is the professional standard the system fails to enforce, which makes individual adherence more important rather than less.
Ask what the broker charges. As with every intermediated market for clinical expertise, the spread is invisible unless you ask.
If you retain experts
Ask for current volume, in writing, with dates. This is the question that most affects the reliability of the opinion and it is routinely not asked.
Ask for the testimony history. Count and side ratio. An expert who declines to provide it has told you something.
Understand what you are selecting for. The research indicates plaintiff and defense expert pools differ systematically in experience and academic profile. Selecting on the wrong attribute produces an expert who is credentialed and not qualified for this specific question.
If you lead a professional society
Publish guidelines. Only 10 of 26 spine surgery societies had public expert witness guidelines. That is a gap your members would benefit from closing.
Look at your own grievance data. If complaints run overwhelmingly against one side, that pattern is visible to researchers, to courts, and eventually to juries, and it undermines the credibility of the process you are trying to protect.
Consider a prospective disclosure standard instead. A voluntary standard that members meet before testifying would achieve more than a committee that acts afterward, and would be far harder to characterize as partisan.
Frequently asked questions
How are medical expert witnesses selected? Typically through referral agencies maintaining private rosters. An attorney contacts a broker, receives curricula vitae, selects an expert, and compensation frequently flows through the broker with an undisclosed markup. Current practice volume, testimony history, and rate benchmarks are generally not verified at any point.
Do plaintiff and defense expert witnesses differ? Systematically, according to research. Among 306 orthopedic malpractice experts identified between 2013 and 2017, plaintiff experts averaged 36 years of experience versus 31 for defense, held academic appointments at 26 percent versus 43 percent, and had h-index values of 6.6 versus 9.1.
Do professional societies police expert testimony? Some do, and the documented pattern is one-directional. Of 59 complaints to one neurosurgical society's conduct committee, 40 resulted in sanction and 57 of the 59 targeted plaintiff-side experts. A later analysis found 28 of 29 grievances filed between 2014 and 2022 again targeted patient-side experts, with the authors describing the process as functioning to discourage testimony against defendants.
What do medical expert witnesses charge? Community-maintained physician resources indicate most set rates between $300 and $800 per hour, with substantial variation by specialty and by activity, such as record review versus deposition versus trial testimony. Comprehensive fee survey data exists commercially behind paid reports.
Should retired physicians serve as expert witnesses? They bring deep experience, availability, and freedom from institutional conflicts, and currency of practice is a legitimate qualification question that opposing counsel will raise. Transparent, dated disclosure of when the physician last performed the relevant procedure at volume is what allows genuinely qualified retired clinicians to participate credibly.
What would improve expert witness quality? Prospective, symmetric disclosure rather than retrospective sanction: verified current practice volume with dates, published testimony counts and side ratios, and rate transparency, applied identically to experts on both sides. The existing grievance mechanism operates after testimony and, in the published data, overwhelmingly in one direction.
The bottom line
When a physician's career is on trial, the standard of care is explained to a jury by another physician whose current practice nobody verified, whose testimony history nobody can see, and whose rate nobody benchmarked.
The profession's answer to this has been grievance committees. The published data from at least one specialty shows those committees receiving complaints at a ratio of 57 to 2 against one side, sanctioning most of them, and being characterized in the specialty's own literature as a mechanism of intimidation.
That is not accountability. It is accountability's shape, pointed in one direction, applied after the fact, when nothing can be corrected.
The information that would actually improve the reliability of medical testimony is simple, cheap, and entirely uncollected: does this expert do this operation now, how often do they testify, and for whom?
Every physician in the room could answer those questions about themselves in thirty seconds. Nobody is ever asked.
Part of a series on the missing professional infrastructure of healthcare. Previously: Tumor Board Exile
Evidence note: sources include Annals of Surgery (2009) and Surgical Neurology International (2025) on professional society grievance patterns; Journal of Bone and Joint Surgery (2018) on credential asymmetry among 306 orthopedic malpractice experts; Neurosurgery (2023) on society guideline availability; Clinical Orthopaedics and Related Research (2009) citing survey data on expert testimony participation; and physician community resources on rate ranges, which are community-reported rather than audited. Grievance data comes from single-specialty analyses and may not generalize across all professional societies. Nothing in this article is legal advice.
