Most physicians who become expert witnesses didn't plan on it. A colleague suggested it. A friend at a law firm called about one case. They liked the work, said yes to the next, and built a steady side practice that ran alongside their clinical schedule for years.
If you're a physician considering whether medical-legal work makes sense for you, this is the practical introduction we wish every new expert had at the start: what the work actually involves, how it pays, how much time it takes, and the things that protect — or threaten — your clinical career while you do it.
What expert witness work actually looks like
Expert witness engagements fall into a few categories. Most physicians do some mix of all of them:
Case record review
An attorney sends you medical records — sometimes thousands of pages — and asks for your opinion on a specific question. Did the treating physician meet standard of care? Did the surgery cause this outcome? Was this complication foreseeable? You read the records, form an opinion, and either write a report or have a phone call with the attorney summarizing your view. Most reviews take 3–10 hours depending on case complexity.
Written report
A more formal version of the case review. You write a structured report — typically 5–20 pages — laying out your qualifications, the materials you reviewed, your opinions, and the bases for them. Written reports are required in federal court and increasingly in state cases. Plan on 8–15 hours for a thorough one.
Deposition
If the case advances, opposing counsel takes your deposition under oath. You sit in a conference room (or on Zoom) and answer questions for anywhere from two to eight hours. The questioning is adversarial — opposing counsel's job is to expose any weakness in your opinion. This is where less prepared experts struggle.
Trial testimony
Far fewer cases reach trial than start out heading that way. But when they do, your testimony in front of a jury is often the most consequential thing in the courtroom. Trial testimony pays the most and is the most stressful — typically a full day, sometimes more.
Independent Medical Examination (IME)
You examine a plaintiff yourself and produce a report on your findings. Common in personal injury, workers' compensation, and disability cases. Requires Florida licensure and adds a clinical-skills dimension to expert work.
What it pays
Expert witness fees vary by specialty, jurisdiction, experience, and engagement type. Florida market ranges as of 2026:
- Case record review: $300–$600 per hour
- Written reports: Usually billed at the review rate, full hours
- Deposition testimony: $400–$800 per hour, sometimes with a half-day or full-day minimum
- Trial testimony: $500–$1,200 per hour
- Phone consultations with counsel: $250–$500 per hour
These are typical ranges, not promises. Highly subspecialized experts (pediatric neurosurgery, complex transplant medicine) command the upper end. Generalists working in saturated specialties (general internal medicine, family practice) tend toward the lower end. Most working experts set a single review rate and a higher deposition/trial rate, with a non-refundable retainer per engagement.
Retainers
Standard practice is to require an upfront retainer — typically $2,000–$5,000 — before you start reviewing records. The retainer is drawn down against your hourly billing. This protects you against a firm dropping a case mid-review without paying for work completed.
Time commitment
This is the question we hear most from physicians considering expert work. Honest answer: you control it.
A typical engaged physician in our network does 1–3 record reviews a month, a handful of depositions a year, and rarely a trial. That works out to 10–30 hours per month — entirely outside clinical hours, on your own schedule. Many physicians do this on weekends or evenings. Some do it during dedicated administrative blocks.
What it is not: shifts. There's no on-call. No emergency depositions at 3 AM. The work is scheduled weeks in advance, and you accept or decline each engagement based on your availability.
What protects your clinical career
Expert witness work is generally well-tolerated by hospitals, practices, and licensure boards — but the protection comes from doing it right. A few rules:
Be honest in your opinions
The single biggest threat to a physician's clinical reputation is testimony that doesn't hold up — especially testimony that crosses into advocacy. State medical boards and specialty societies have, in rare cases, pursued discipline against physicians for testimony that misrepresented the standard of care. If you can't honestly support an opinion, decline the engagement. The retainer isn't worth your license.
Work both sides
Career experts who only work plaintiff or only work defense develop a reputation, and opposing counsel will use that reputation against them in every future case. Working both sides isn't a moral question — it's a credibility question. The most respected experts in any specialty take cases on their merits regardless of who's retaining.
Stay clinically active
The strongest experts are still practicing. If expert work becomes the majority of your professional time, you become a "career expert" — a phrase opposing counsel will use to suggest you're no longer practicing medicine, just selling opinions. Keep clinical hours. They protect your testimony.
Disclose to your practice or employer
Most employed physicians have outside-activity disclosure requirements in their contracts. Expert witness work usually qualifies as outside activity. Get clarity in writing before you start — not after a case gets press.
What can go wrong
The friction points new experts hit most often:
- Underestimating the records. A "simple case" can come with 4,000 pages of records. Bill for actual hours, set expectations early.
- Getting drawn into advocacy. Attorneys are good at framing questions to nudge you past honest opinion into argument. Hold your line — your job is to give your opinion, not win the case.
- Skipping deposition prep. Even experienced clinicians get caught flat-footed on cross because they didn't review the records again the day before. Treat every deposition like the first.
- Failing to update your CV. Boards lapse. Licenses expire. Publications get out of date. Opposing counsel will check every line — make sure yours is current.
- Chasing payment. This is what intermediaries like Cortex exist for. Working directly with firms means dealing with their accounts-payable cycles. A good concierge handles billing on your behalf.
How to start, practically
- Build a real CV. Not your clinical CV — a litigation-oriented CV that highlights board certification, peer-reviewed publications, academic appointments, and any prior expert experience.
- Decide your rates. Pick a review rate and a higher testimony rate. Don't underprice yourself — firms expect to pay market rates and budget for it.
- Join a vetted network. The two paths are direct (firms find you through word of mouth) or through a network (a service like Cortex matches you to cases). Networks let you start without marketing yourself.
- Take your first case. Treat it like the most important case you'll do, because it sets the tone for everything that follows.
- Keep clinical hours. Your clinical practice is the foundation. Don't let expert work erode it.
Expert witness work isn't for every physician. It rewards careful reading, plain communication, and the willingness to hold an unpopular opinion under hostile questioning. If those traits sound like you, the work can be a meaningful — and well-compensated — complement to a clinical career.