An expert witness is warranted when the case involves future medical and non-medical care needs, the cost of that care, causation, or medical standard of care. Courts admit expert testimony where specialized knowledge will help the trier of fact understand evidence or determine a fact in issue. Retain early so the expert can inform discovery and strategy.
The federal admissibility framework and analogous state frameworks permit expert testimony where specialized knowledge will help the trier of fact, the testimony is based on sufficient facts or data, it is the product of reliable principles and methods, and the expert has reliably applied those principles to the case (Daubert v. Merrell Dow Pharmaceuticals, Inc., 1993; Fed. R. Evid. 702).
In an injury case with long-term care implications, several experts commonly address distinct questions that together establish damages. The life care planner projects future medical and non-medical needs and their cost. The treating physician or a physical medicine and rehabilitation specialist supplies the medical foundation for those needs. A standard of care expert addresses breach in medical malpractice matters. An occupational or physical therapist may quantify functional capacity or assess the home. A forensic economist reduces the projected costs to present value. Where a settlement must account for Medicare, a Medicare set-aside allocator may be added.
Retain as early as practical. Early retention allows the expert to inform records collection, suggest FCE referrals, evaluate the claimant's medical trajectory, and provide input on deposition questions. Late retention risks gaps in the record and shortened report timelines.
Consider expert retention when the case involves a catastrophic injury with lifelong care implications, when the opposing party has served a life care plan that needs a rebuttal, when future medical costs are a significant component of damages, when medical causation is at issue, when standard of care is disputed, or when the defense has retained opposing experts.
A treating physician can testify as both a fact witness (regarding treatment) and, in some jurisdictions, as an expert witness (regarding opinion), but limits apply. Retained experts are typically engaged specifically for expert opinion.
It varies. Many catastrophic injury cases use a life care planner, a physician who supplies the medical foundation, and a forensic economist together. Smaller cases may need only a medical cost projection and a physician.
Yes, subject to jurisdictional disclosure rules. Early designation preserves flexibility; withdrawal procedures are governed by local rules.