50 Best Cross-Examination Questions for Medical Expert Witnesses

"Can you state your board certifications, and the dates of original certification and most recent recertification?"

Pin the witness to specific certs. Sets up scope overreach attacks later.

"Within [their broad specialty], do you consider yourself a specialist in [the narrow area at issue in this case]?"

Gets the witness to either concede limited expertise OR overreach (great for impeachment).

"What percentage of your professional time is clinical practice vs. expert witness work vs. administrative work vs. teaching?"

"In the past 12 months, how many patients with [condition at issue] have you personally seen or treated?"

If the answer is low, you have scope-overreach ammo.

"Have you published any peer-reviewed articles on [specific issue in this case]? If so, what are the citations?"

"Do you hold any current academic faculty appointments? What is your teaching load?"

"Can you list every medical record, deposition transcript, and other document you reviewed before forming your opinion?"

Demand the complete list. Close-ended. No "generally everything." Rule 702(b).

"Were there any records or deposition transcripts in this case you did NOT review?"

"Did you review the actual imaging studies in DICOM format, or only the radiologist's written reports?"

"How many hours did you spend reviewing the records in this case?"

If it's low, undermines the thoroughness of the review.

"Were the records provided to you by opposing counsel, or did you independently request any specific records?"

"Did you personally examine the plaintiff?"

If no, weakens their opinion on specific findings.

"Did you review the deposition transcripts of [co-treating provider]? Of [nursing staff]?"

"When were the most recent records you reviewed in this case dated?"

"Can you describe the step-by-step methodology you used to arrive at your opinion on [specific issue]?"

"What specific peer-reviewed literature did you consult in forming this opinion?"

"What specialty society guidelines or institutional protocols applied to this situation?"

"What alternative causes did you consider and rule out? How did you rule each out?"

"When you say X caused Y, are you applying a 'more likely than not' standard or a stricter Bradford Hill analysis?"

"In the general clinical setting, what is the known rate of misdiagnosis for [condition]?"

"Has the methodology you're applying here been validated in any peer-reviewed study?"

"To what degree of medical certainty do you hold this opinion?"

If anything less than "reasonable medical certainty," you have Rule 702 exclusion ammo.

"What is your hourly rate for deposition testimony? For trial testimony? For record review?"

"How many hours have you billed on this case to date, and what is the total fee?"

"What percentage of your annual income comes from expert witness work versus clinical practice?"

"In the past three years, what percentage of your cases have been for plaintiffs vs. defendants?"

"How many cases have you been retained on by [opposing counsel's firm]?"

"How many total depositions have you given in your career? How many in the past year?"

"Do you consider yourself a 'professional witness' in the sense that expert testimony is a regular and significant part of your career?"

"How do you define 'standard of care' as you're applying that term in this case?"

"What is the source of that standard of care — specialty society guidelines, institutional protocols, textbook, or something else?"

"Is the standard of care you're applying here nationally applicable, or specific to [geographic area]?"

"Did the defendant hospital / clinic have its own written standard of care for this situation?"

"What patient-specific factors (age, comorbidities, prior history) did you factor into your opinion?"

"Is there any alternative explanation for the plaintiff's injury that doesn't require negligence by the defendant?"

"Were there any intervening factors between the alleged negligence and the injury that could have caused or contributed to the injury?"

"Can you say to a reasonable degree of medical certainty that the alleged breach caused the specific injuries claimed?"

"What are the specific injuries and damages you attribute to the alleged breach? What are you specifically NOT attributing to it?"

"Are you familiar with the [Year] [Journal] article by [Author] titled '[Title]'? Would you agree it's authoritative?"

Set up learned treatise attack. Have the article ready to hand over.

"Have you ever testified in any prior case about [similar issue]?"

"In those prior cases, did you take the same position on [issue] that you're taking here?"

"Is there any aspect of [specialty] outside your own practice where you would NOT feel qualified to offer an expert opinion?"

"In forming this opinion, did you rely primarily on your clinical experience, on published literature, or on both?"

"How many times have you spoken with [opposing counsel] about this case? How many hours of preparation?"

"Did anyone — opposing counsel, a co-expert, anyone — provide you with a draft or outline of your opinion before you wrote your report?"

"Is there any aspect of your opinion that you hold with LESS than reasonable medical certainty?"

"Is there anything we discussed today that you want to clarify or correct for the record?"

Gives them a chance to back off bad testimony. If they don't take it, the record is clean for you.

"Are there any additional opinions you hold in this case that weren't in your expert report?"

"Do you intend to supplement your opinion with any additional work between now and trial?"

"What is the total fee you will bill for today's deposition?"

Closes with compensation reminder for the jury.