In an ERISA disability case, a claimant who challenges a denial of long-term disability benefits by filing a court action is generally not able to present evidence to the court that is not in the administrative record. The administrative record is legalese for all of the medical records, documents and other information obtained by and submitted to the plan administrator during the initial stages of the claim and through the appeal process.
For example, if a claimant in an ERISA long-term disability case has an important affidavit from her supervisor showing that her disability prevented her from performing her job, she will need to submit that affidavit to the plan administrator while her claim is being reviewed and before the final decision on appeal is made by the plan administrator. If she fails to submit the affidavit before the appeal process is concluded, a court likely will not consider her affidavit, no matter how compelling. Rather, the court will only evaluate the materials that the plan administrator reviewed in determining whether the denial of benefits was proper. (This is why it is so crucial to ensure that the administrative record is complete).
Because courts are generally unwilling to consider any evidence which is not in the administrative record, plaintiffs are generally not entitled to discovery from the insurance company.