Surveillance and Collateral Evidence in IMEs and Medical Reviews

Welcome back to our 26 in '26 Blog Series. Each post will address a top-of-mind topic in the clinical evaluation services sector. In the previous post we discussed Return to Work Analysis. This is the nineteenth post in our series and will discuss Surveillance and Collateral Evidence.

Surveillance and other collateral evidence often generate strong reactions in claims because they sit outside the traditional medical record. Video footage, social media posts, recorded statements, and prior claim data can be informative—but they can also undermine credibility when misused.

Collateral evidence is non-medical by nature. It does not diagnose conditions or replace clinical findings. Its value lies in providing context, particularly around functional presentation and consistency over time.

In Independent Medical Exams (IMEs), surveillance may be referenced to compare observed activities with reported limitations. Defensible reports describe what is observed factually and integrate those observations with medical findings, without speculation or accusations.

Peer Reviews often encounter collateral evidence indirectly through treating notes or claim summaries. The reviewer’s role is to evaluate whether that information meaningfully changes the medical interpretation, not to re-adjudicate surveillance.

In Functional Capacity Exams, collateral evidence may inform interpretation of effort or variability but should never override objective testing data.

Fitness-for-Duty Exams (FFD) may consider collateral information when assessing safety risk, but conclusions must remain grounded in medical and occupational standards.

Overreliance on surveillance creates risk. When collateral evidence is weighted more heavily than medical findings, opinions become vulnerable to challenge.

Tone and transparency are critical. Acknowledging the limits of surveillance- its short duration and unknown context- strengthens credibility.

Best Practice

Use collateral evidence as context, not proof. Describe observations factually, acknowledge limitations, and integrate with clinical findings rather than substituting for them.

Next in the Series

Next: T — Timeliness: why turnaround time affects cost, credibility, and outcomes.