California Case Summaries

Mendoza v. First Unum Life Insurance Co. — Short-term disability payments create no presumption of long-term disability

Unreported / Non-Citable

Case
Mendoza v. First Unum Life Insurance Company
Court
Ninth Circuit Court of Appeals
Judge
Johnnie B. Rawlinson (Bill Clinton, 2000); Gabriel P. Sanchez (Joseph R. Biden, 2022)
Date Decided
2026-08-10
Docket No.
25-3080
Status
Unreported / Non-Citable
Topics
ERISA, long-term disability benefits, medical evidence, prior short-term benefits, administrative record

Background

Siam Mendoza sued First Unum under the Employee Retirement Income Security Act (ERISA) after the insurer denied long-term disability benefits. The Southern District of California reviewed competing medical opinions and concluded that Mendoza had not proved disability under the plan.

On appeal, Mendoza argued that examining doctors deserved greater weight than record reviewers, that payment of short-term benefits should create a presumption of continuing disability, and that the court improperly relied on rationales the insurer had not stated during the claim process.

The Court’s Holding

The Ninth Circuit affirmed in a nonprecedential memorandum. The administrative record supported the trial judge’s weighing of the competing experts, including normal cognitive-testing findings from some of Mendoza’s own professionals. ERISA does not require special deference to a doctor merely because that doctor examined the claimant in person.

The panel also rejected a legal presumption based on prior short-term disability payments. Such payments may support a claimant as evidence, but they do not compel approval under a different long-term plan and its definition of disability.

Finally, the district court did not adopt an impermissibly new denial rationale. Its discussion of possible malingering and inconsistencies in witness statements was subsidiary to Unum’s administrative explanation that self-reported symptoms were disproportionate to largely unremarkable clinical testing.

Key Takeaways

  • The claimant retains the burden to prove disability under the actual long-term plan terms.
  • Short-term benefit approval is evidence, not a binding presumption.
  • Courts may credit record-reviewing professionals over examining doctors when the record supports that choice.
  • Insurers cannot invent a new rationale in court, but may elaborate on a rationale stated during review.

Why It Matters

California employees pursuing ERISA disability claims should build the administrative record around the long-term plan’s precise standard and reconcile subjective reports with testing before suit. Employers and insurers should clearly state the core denial rationale during the administrative process so later evidentiary detail is recognizable as support rather than post hoc reasoning.

Read the full opinion (PDF) · Court docket

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