How to Write a Unum Disability Appeal Letter That Works
A step-by-step guide to writing a compelling Unum disability appeal letter — what to include, how to structure it, and the evidence that actually overturns denials.
How to Write a Unum Disability Appeal Letter That Works
When Unum denies your disability claim, your appeal letter is your most powerful tool. It is your opportunity to correct the record, introduce critical evidence, and make the legal and factual argument for why Unum's decision was wrong. A weak, unfocused appeal rarely succeeds. A thorough, evidence-based appeal can and does overturn Unum denials.
This guide walks you through exactly how to write an appeal letter that gives you the best possible chance of winning.
Understand What Unum's Appeal Reviewers Are Looking For
Unum's appeal reviewers — typically claims specialists and in-house physicians — are evaluating whether the initial denial was supported by the evidence in your file. Your letter needs to accomplish three things:
- Identify the specific factual errors or mischaracterizations in Unum's denial
- Provide new evidence that addresses those errors
- Argue that under the correct application of policy language and governing law, you are entitled to benefits
A letter that simply says "I disagree with your decision" will fail. A letter that says "Your reviewer Dr. X concluded there was no objective evidence of functional limitation, but the attached FCE by Dr. Y and the MRI findings attached as Exhibit B demonstrate precisely such limitations" is far more effective.
Gather These Documents Before You Write a Word
Do not begin your appeal letter until you have:
- Your complete claim file: Request it in writing from Unum immediately after receiving your denial. Unum must provide it free of charge. The file may contain internal medical reviews, surveillance footage, vocational analysis, and internal communications — all of which may contain inaccuracies you need to challenge.
- Your policy documents: The exact language of the disability definition, any own-occupation or any-occupation provision, and all exclusions.
- Your complete medical records: Treating physician notes, specialist records, diagnostic imaging, lab results, and any neuropsychological or psychiatric evaluations.
- An RFC form from your treating physician: A Residual Functional Capacity assessment completed by your doctor specifying exactly what you can and cannot do.
Structure of a Strong Unum Appeal Letter
Opening Paragraph
State your name, claim number, date of denial, and that you are filing a formal administrative appeal under ERISA § 503 and the plan's claims procedures. Request that your appeal be reviewed by a qualified reviewer who was not involved in the initial determination.
Section 1: Summary of Your Disability and Treatment
Provide a clear, factual summary of your diagnosis, when it began, your treatment history, and the functional limitations that prevent you from working. Be specific: "I have been unable to sit for more than 20 minutes without severe lumbar pain radiating to my left leg, which prevents me from performing the data entry and computer work my position requires" is far more useful than "I am in constant pain."
Section 2: Errors in Unum's Denial
Go through Unum's denial letter point by point. For each reason Unum gave for denying your claim, explain:
- What Unum claimed
- Why that claim is factually incorrect or legally flawed
- The specific evidence you are submitting to correct it
If Unum's reviewing physician characterized your condition inaccurately, identify the specific statements and provide your treating physician's written rebuttal. If Unum relied on a single-day FCE to claim you can perform sedentary work, explain the inherent limitations of FCE methodology and attach literature or expert commentary if available.
Section 3: New Evidence
List every document you are submitting with the appeal and explain what each one shows. Label exhibits clearly (Exhibit A, Exhibit B, etc.) and reference them throughout your letter. Common exhibits include:
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- Updated treating physician letter or RFC form
- Specialist evaluations
- Diagnostic test results
- Personal statement describing your daily limitations
- Statements from family members or caregivers
- Social Security Disability award letter (if applicable)
- Independent vocational expert report (if applicable)
Section 4: Legal Argument
Cite the applicable policy language and argue that under the correct definition of disability, the evidence supports your claim. If your policy is ERISA-governed, you may reference relevant case law:
- Firestone Tire & Rubber Co. v. Bruch (1989): Establishes the court's review standard and acknowledges the insurer's conflict of interest.
- MetLife v. Glenn (2008): Requires courts to weigh the insurer's structural conflict of interest — Unum evaluates claims and also pays them.
- Black & Decker Disability Plan v. Nord (2003): While plan administrators need not give special deference to treating physicians, they must give adequate reasons for rejecting their opinions.
Closing
Formally request that Unum reverse its denial, approve your claim in full, and provide retroactive payment of all benefits due. State that you reserve all rights under ERISA and applicable law, including the right to seek External Independent Review: Complete Guide" class="auto-link">external review and to file suit in federal court under § 502(a) if necessary.
Deadlines and Submission
Most Unum ERISA plans allow 180 days to submit your appeal from the date of the denial letter. Check your denial letter for the specific deadline. Missing this deadline may extinguish your right to appeal and to sue.
Send your appeal to:
Unum Group P.O. Box 2980 Portland, ME 04104
Always send via certified mail with return receipt requested and keep copies of everything you submit.
Under the 2016 DOL claims procedure regulations (effective April 2018), Unum must provide you with any new evidence or rationale generated during the appeal review before issuing a final decision, giving you an opportunity to respond.
One Final Tip: Assume This Will Go to Court
Because ERISA generally limits courts to reviewing only the administrative record, write your appeal letter as if a federal judge will read it. Every piece of evidence you need must be in the record before Unum issues its final appeal decision. There is no second chance to introduce evidence in litigation.
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