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Trupanion — Appeal a Denied Claim

Trupanion accepts vet-led appeal letters by fax or email referencing the claim number; the policyholder may also submit their own appeal. The appeal letter must explain why the claim should be eligible for coverage, with a copy of the Explanation of Benefits the carrier issued. Trupanion's escalation path includes review by an Independent Third Party Veterinarian (ITPV), a board-certified specialist, when the denial is based on medical-history (not on a direct policy exclusion). The Trupanion Terms of Use require binding individual arbitration in Seattle under AAA rules.

Last verified 2026-05-06 · Verification pending — see citations below

Quick reference

Appeal channel

[email protected]

Portal: Sign in

1-855-727-9079

Appeal window

180 days from denial

Carrier response

~21 days

Underwriter

American Pet Insurance Company (New York-domiciled P&C insurer wholly owned by Trupanion, Inc.); ZPIC Insurance Company in some states; sold and administered by Trupanion Managers USA, Inc.

What the appeal letter must include

  • •Claim number from the Explanation of Benefits
  • •Policy number
  • •Reason you believe coverage applies (referencing the cited exclusion)
  • •Veterinarian's letter of medical necessity (recommended)

Required attachments

  • •Explanation of Benefits letter
  • •Veterinarian's letter of medical necessity
  • •Supporting medical documentation

Common denial reasons at Trupanion

Based on the carrier's own policy language and consumer-complaint patterns. Pick the closest match for the cited reason in your denial letter.

Pre-existing condition

The carrier is saying your pet had this issue — or showed signs of it — before they started insuring you. Whether they're right depends on what your vet records actually show, when the first symptoms appeared, and how the carrier defines 'pre-existing' in your specific policy.

Bilateral condition

The carrier is treating one knee's prior surgery (or one ear's prior infection) as evidence that your pet is predisposed to the same problem on the OTHER side — and refusing to cover the second side. This is the most aggressive use of the pre-existing rule and one of the most fightable.

Waiting period

The carrier is saying the symptoms or treatment date fell inside the time window where your coverage hadn't yet kicked in for that category. Whether they're right depends on what 'date of incident' means in your policy: is it the date of first symptom, date of diagnosis, or date of treatment?

External escalation

If the carrier-side ITPV review maintains the denial, the policyholder retains the right to file a state insurance commissioner complaint. Trupanion's Terms of Use require binding individual arbitration in Seattle under AAA rules with a class-action waiver — review the arbitration clause carefully before pursuing court remedies.

Find your state insurance commissioner →

Sources

We use Google Analytics to understand which carrier hubs and denial-reason pillars are most useful. We never log the specific inputs you put into the Appeal Letter Generator — that runs entirely in your browser. Read our privacy policy.