Biased Insurance Experts: How to Challenge the Insurer's Hired Professionals

When your insurance company sends an engineer to inspect your roof, a hygienist to test for smoke contamination, or an estimator to scope your damage — those professionals are selected and paid by the insurer. They are not independent. And in far too many cases, they consistently produce findings that minimize the claim. This isn't coincidence; it's a systemic problem in the insurance industry, and California courts are beginning to address it.

The Problem: Repeat-Player Experts

Insurance companies don't randomly select experts. They maintain rosters of “preferred” professionals — engineers, industrial hygienists, contractors, appraisers — who are used repeatedly across thousands of claims. These experts depend on the insurer for a significant portion of their income. The incentive structure is obvious: experts who consistently produce findings favorable to the insurer keep getting hired. Those who don't, get dropped from the roster.

This creates selection bias— over time, the insurer's expert roster is populated almost exclusively by professionals who reliably produce claim-minimizing results. It's not that every finding is wrong, but the systemic tilt is real and measurable. In May 2025, the U.S. Senate held hearings on insurer claims practices in which whistleblower adjusters provided devastating testimony: one adjuster (Jordan Lee) stated that 44 of his 46 field reports — 96% — were altered by the insurer, with some estimates reduced by as much as 98%. Another (Ben Mandell) testified that 18 of 20 reports (90%) were changed, and that he was fired for refusing to omit documented damage. A forensic engineer confirmed that over 90% of his causation reports were altered through a so-called “peer review” process at the home office, which reversed his field findings to align with the insurer's denial strategy.

Case Study: Eaton Fire “Sham Inspections” Class Action

The repeat-player expert problem is not theoretical. In the aftermath of the Eaton fire, a class action lawsuit was filed alleging that insurance company-assigned inspectors conducted “sham inspections” — inspections that were pre-determined to find minimal damage regardless of the actual conditions on the ground. According to the complaint, these inspectors spent inadequate time on-site, used improper methods, and reached conclusions that were wildly inconsistent with the actual extent of fire damage to the properties.

The lawsuit highlights the core structural problem: these inspectors were selected and paid by the carriers, depended on the carriers for repeat business, and understood — whether explicitly told or not — that finding extensive damage would mean losing future assignments. The economic incentive structure made the outcome predictable before the inspector ever set foot on the property.

For policyholders, the Eaton fire lawsuit is a reminder: you should never assume that the insurer's inspection was fair simply because a licensed professional conducted it. If the inspection was brief, if the inspector did not thoroughly document all areas of damage, or if the conclusions seem inconsistent with what you can see with your own eyes — those are red flags that warrant an independent evaluation.

Types of Experts Insurers Use

Engineers

After a fire, wind event, or water loss, the insurer may send a structural or forensic engineer to determine the cause and extent of damage. A biased engineer may attribute fire damage to “pre-existing settlement,” classify wind damage as “long-term wear,” or limit the scope of structural damage to minimize the insurer's exposure. For detailed strategies on responding to carrier engineer reports, see our guides on defeating carrier engineers and understanding how engineering reports affect coverage decisions.

Industrial Hygienists

For smoke damage claims, the insurer hires a Certified Industrial Hygienist (CIH) to test for contamination. A biased hygienist may test only a few surfaces, use testing thresholds that are higher than health-based standards, or compare results to “background” levels that are themselves elevated from the same event. The sampling methodology matters enormously — an expert who uses less sensitive methods or samples fewer locations will inevitably find less contamination. For a deeper understanding of how sampling methods can be manipulated, see our guide on environmental sampling methods.

Estimators and Adjusters

The insurer's adjuster or estimator produces the Xactimate estimate that determines your payout. Biased estimating includes using lower-grade materials than what was in the home, omitting line items for damage that's clearly present, applying the wrong labor rates, and excluding overhead and profit for general contractors.

Appraisers

In the appraisal process, each side selects an appraiser. The insurer's appraiser is supposed to independently determine the value of the loss. In practice, insurers frequently select appraisers from the same pool of repeat-player experts who consistently value losses on the low end.

The Demer Framework for Assessing Expert Bias

In Demer v. IBM Corp. LTD Plan(9th Circuit, 2016), the court established a framework for evaluating whether an insurer's expert is biased. While the case arose in the ERISA context, California state courts have begun applying similar principles to property insurance disputes. The Bagramyan v. Government Employees Insurance Co.decision was one of the first California appellate cases to recognize an “inference of bias” standard.

The Demer framework looks at four factors:

1. Prior business dealings and compensation. How much business does the expert receive from this insurer? If an engineering firm gets 80% of its revenue from one insurance company, its independence is questionable.
2. Patterns across other claim files.Does this expert consistently produce findings that favor the insurer? If the same engineer attributes damage to “pre- existing conditions” in 90% of cases, that pattern is evidence of bias.
3. Reliability of principles and methodologies. Does the expert use accepted, scientifically sound methods? Or do they use unconventional approaches that happen to produce insurer-favorable results?
4. Insurer's safeguards for ensuring impartiality. Does the insurer have any process to verify that its experts are providing unbiased assessments? Or does it simply hire whoever produces the lowest numbers?

How to Challenge Biased Experts on Your Claim

1. Hire your own independent expert. This is the most important step. Get your own engineer, hygienist, or contractor to inspect the same damage and produce an independent report. When the two reports conflict, the insurer can no longer rely solely on their expert.
2. Request the expert's qualifications and relationship with the insurer. Ask for: the expert's CV, how many assignments they've received from this insurer in the past 3 years, their total compensation from this insurer, and the percentage of their work that comes from insurance company assignments.
3. Challenge the methodology.If the engineer attributed damage to “pre-existing conditions,” ask what evidence supports that conclusion. If the hygienist tested only one room, ask why the entire home wasn't tested. If the estimator used economy-grade materials, ask what the basis was for departing from what was actually in the home.
4. Document the pattern.If the same expert appears in multiple claims in your area (common after a wildfire or storm), document the pattern. Other policyholders, Public Adjusters, and attorneys in the area may have information about the expert's track record.
5. File a CDI complaint.If the insurer is relying on a clearly biased expert to underpay your claim, that may violate California's Fair Claims Settlement Practices regulations. The insurer must conduct a thorough, fair, and objective investigation — not one designed to reach a predetermined conclusion. See our guide on filing a CDI complaint.

Demanding Transparency from Carrier-Assigned Experts

You have the right to scrutinize every expert the insurer relies on. Too many policyholders accept the carrier's expert report as though it were a neutral, authoritative finding. It is not. It is a report paid for by the party with a financial interest in minimizing your claim. The following information requests can expose whether the expert is truly independent or is a repeat player producing predictable results:

• Full professional qualifications.Request the expert's CV, licenses, certifications, and any disciplinary history. Verify that their credentials are relevant to the specific type of damage they were hired to evaluate.
• Methodology disclosure. Demand a detailed explanation of the methods used, including what standards or protocols they followed, what areas they inspected (and what areas they did not), how long they spent on-site, and what equipment they used. Compare this to accepted industry standards for the type of inspection.
• Prior carrier work history. Ask how many assignments the expert (or their firm) has received from this insurer in the past three to five years, the total compensation received, and what percentage of their total revenue comes from insurance company assignments. This information goes directly to the Demer bias factors.
• Outcome history.If discoverable (often in litigation), request data on the expert's track record: in what percentage of assignments did they find damage below the policyholder's claimed amount? A 95% rate of insurer-favorable findings is not evidence of expertise — it is evidence of bias.
• Communication with the carrier. Were there pre-inspection communications from the insurer that framed the assignment, suggested conclusions, or limited the scope of the inspection? Any such communications can be powerful evidence that the outcome was directed, not independently determined.

Why Independent Expert Evaluations Are Essential

The single most effective way to combat a biased carrier expert report is to obtain your own independent evaluation. When you hire your own engineer, hygienist, contractor, or appraiser, that professional works for you — not for the insurance company. Their findings are based on what they actually observe, not on what their client needs the answer to be.

An independent report creates a conflict in the record that the insurer cannot simply ignore. When the carrier's engineer says the roof damage was “pre-existing” and your engineer says it was caused by the covered event, the insurer must address the discrepancy. If the insurer simply ignores your expert without explanation, that conduct can support a bad faith claim. A public adjuster can help you identify qualified independent experts and coordinate the inspection process.

When Biased Expert Reliance Becomes Bad Faith

Under California law, an insurer acts in bad faith when it fails to conduct a thorough, fair, and objective investigation. Relying on a biased expert to support a predetermined outcome can cross this line. Key indicators:

• The insurer ignores your independent expert's report without explanation
• The insurer's expert is known to consistently favor insurers across many claims
• The expert's methodology is unreliable or inconsistent with industry standards
• The insurer uses the expert's report as a shield to avoid paying undisputed amounts
• The expert's conclusions are contradicted by the physical evidence