Plaintiff medical expert reports may face reliability scrutiny for recurring analytical reasons. Some overlap with defects seen in defense IME reports, but the significance of each issue depends on the specialty, record, methodology, jurisdiction, and opinion offered. A physician reviewer can identify clinical and factual concerns for counsel and the retained expert to evaluate.
The common failure modes
Confidence that exceeds the evidence: the expert states a causation opinion "to a reasonable degree of medical certainty" but the record does not support that confidence level. This is the most common and most exploitable defect. Selective evidence citation: the expert cites supporting evidence and does not address contradictory evidence. Selective treatment of material contrary evidence may create a reliability or foundation issue for counsel to examine. Methodology gaps: the expert's analytical approach may require closer evaluation under the applicable evidentiary standard. This includes failure to rule out alternative causation, failure to establish dose-response where required, and reliance on clinical experience alone where the scientific literature requires more.
What a physician analyst identifies
The same seven-defect analytical framework applied in IME deconstruction works in reverse for plaintiff expert reports. Unsupported assertions, omitted contrary evidence, internal contradictions, selective guideline citation, confidence misalignment, methodology gaps, and template language mismatches. Each identified defect maps to a specific deposition question or a clinical methodology issue for counsel and the retained expert to evaluate under the applicable evidentiary standard.
Why this matters for defense strategy
A thorough plaintiff expert report deconstruction before deposition gives defense counsel the specific questions to ask — built from the report's actual weaknesses, not generic deposition templates. When those questions are physician-authored, they target clinical reasoning vulnerabilities that a non-physician questioner might miss.