How Life-Care Planning Expert Witnesses Get Excluded Under Daubert — and How to Survive the Cross

Daubert is not a medicine problem. Under Kumho Tire and the 2023 amendment to Federal Rule of Evidence 702, the trial court's gatekeeping applies to every form of specialized testimony — life-care planning included. A 20-year study of 2,842 challenges to non-medical experts found that roughly half of those opinions were excluded or partially excluded, and the single most-cited reason was “unreliable methodology.”

The exclusion rarely happens in a written motion alone. It is built, piece by piece, in the deposition cross-examination — where opposing counsel walks a life-care planning expert into conceding scope, methodology, or an assumption that unravels the whole opinion. Here are the three traps, and how a prepared expert answers each one.

The three ways life-care planning experts lose ground

Scope: testifying outside your lane

The cross-examiner's question sounds simple:

You're not a physician — yet your plan projects decades of future surgeries and care, correct?

Why it works: The planner-vs-physician scope line. Build on the physicians' recommendations; don't make medical judgments.

A stronger answer: “The plan is built on the treating and consulting physicians' recommendations; I cost, organize, and project them under accepted life-care-planning methodology — I don't prescribe the care myself.”

Methodology: the reliability attack

The cross-examiner's question sounds simple:

Your costs came from a national database — you didn't verify them against local providers, did you?

Why it works: Cost-data methodology. Source and geo-adjust the costs and disclose it.

A stronger answer: “I used published, geographically-adjusted cost data and disclosed the source; where local quotes were available I incorporated them.”

Assumptions: the one premise that sinks the opinion

The cross-examiner's question sounds simple:

You assume the plaintiff lives a normal life expectancy despite this injury, correct?

Why it works: The life-expectancy assumption. Tie it to an accepted basis and the records.

A stronger answer: “I used an accepted life-expectancy basis and addressed any reduction the medical records support rather than assuming a figure.”

How to prepare for the cross before you're sworn in

Every one of those traps is defeatable — but not by reading your report one more time. The experts who survive the cross have done three things:

• Rehearsed the cross-examination out loud, repeatedly, against a realistic examiner — so the scope concession, the methodology defense, and the assumption hedge are second nature.
• Mastered the record, so that when counsel asks them to recall the one line buried in thousands of pages of the medical records, treatment plans, and cost data, they can produce it in seconds rather than fumble.
• Stress-tested the report against FRE 702 — finding the reliability gaps before opposing counsel does.

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