Unum Short-Term Disability Denied: Appeal Steps and Strategy

Short-term disability (STD) benefits are supposed to replace a portion of your income when illness or injury prevents you from working. When Unum denies your STD claim, it can create immediate financial hardship — especially since STD is designed to bridge the gap while you recover. Fortunately, you have strong appeal rights, and many Unum STD denials are reversible.

Common Reasons Unum Denies Short-Term Disability

Unum denies STD claims for a predictable set of reasons. Identifying the specific reason in your denial letter is the first step toward building your response.

Insufficient medical documentation. Unum frequently claims there is not enough objective medical evidence to support your inability to work. This is particularly common for conditions like mental health disorders, fibromyalgia, migraine, chronic pain, and back injuries — conditions that rely heavily on patient-reported symptoms. Unum may state that its medical reviewer found "no objective findings to support the level of functional impairment claimed."

Pre-existing condition exclusion. Many Unum STD policies exclude conditions that were treated or diagnosed within a specified lookback period (often 3 to 12 months) before your coverage effective date. If Unum determines your condition is pre-existing, it will deny benefits. However, these exclusions are frequently applied too broadly and can be successfully challenged.

Failure to meet the definition of disability. STD policies define disability as inability to perform the material duties of your own occupation due to sickness or injury. Unum's reviewing physicians may conclude that your condition does not prevent you from performing your job's core functions.

Delayed or incomplete claim submission. Unum requires claims and supporting documentation within specific timeframes. Late submission or missing forms can result in denial, though these can often be addressed if you can show good cause.

Return-to-work disputes. Unum may claim you have recovered sufficiently to return to work before your treating physician agrees. This commonly happens when Unum's nurse case manager or reviewing physician has a different assessment than your doctor — but your doctor's ongoing documentation should control.

Your STD Appeal Strategy

Step 1: Get Your Claim File

Within 30 days of your denial, send a written request to Unum for your complete claim file under ERISA § 503 and the DOL claims procedure regulations. The file must include all medical reviews, internal notes, surveillance activity, and the specific policy language applied to your claim.

Unum STD Appeals Address: Unum Group P.O. Box 2980 Portland, ME 04104

Send all correspondence via certified mail with return receipt requested.

Step 2: Strengthen Your Medical Evidence

Your treating physician's records are the backbone of your appeal. Work with your doctor to provide:

• A detailed letter explaining why your condition prevents you from performing your specific job duties
• A Residual Functional Capacity (RFC) form specifying your physical and cognitive limitations
• All relevant diagnostic test results, treatment notes, and specialist records
• A statement addressing any specific concerns raised in Unum's denial letter

For mental health conditions, a comprehensive psychiatric or psychological evaluation is especially important. Unum reviewers often minimize mental health claims without detailed clinical documentation.

Step 3: Address Unum's Specific Objections

Your appeal must respond directly to every reason Unum gave for the denial. If Unum's physician reviewer said there is no objective evidence, your appeal must provide specific objective evidence — test results, imaging, examination findings — that Unum's reviewer either overlooked or failed to adequately weigh.

Step 4: Submit a Thorough Appeal Letter

Your appeal letter should be organized, professional, and comprehensive. Cite the policy language, reference your evidence, and explain why the denial was incorrect as a matter of both fact and policy interpretation.

ERISA Protections for STD Claimants

If your STD policy is through your employer, it is almost certainly an ERISA plan. ERISA gives you:

• 180 days to appeal from the date of the denial letter (though Unum's policies sometimes provide 60 or 90 days — check your denial letter and plan documents carefully)
• The right to request your complete claim file at no charge
• The right to have your appeal reviewed by someone who was not involved in the initial denial
• The 2016 DOL claims procedure improvements: Under regulations effective April 2018, disability claimants have the right to receive any new evidence or rationale Unum generates during the appeal before a final decision — giving you an opportunity to respond before the record closes
• The right to sue under § 502(a) after exhausting administrative remedies

The Importance of the Administrative Record

In ERISA litigation, federal courts generally review only the evidence that was in the administrative record at the time of the final decision. This means everything must go into your appeal — you cannot save evidence for court. Submit everything relevant during the administrative appeal process.

When to Consult an ERISA Attorney

If your STD claim involves a significant benefit amount, a long-term condition, or a denial based on Unum's physician reviewer contradicting your treating doctor, consulting an ERISA disability attorney is wise. Most ERISA disability attorneys work on contingency — meaning they only get paid if you win — so cost should not be a barrier to getting professional guidance.

Fight Back With ClaimBack

A Unum STD denial can feel overwhelming, but the appeal process gives you a real opportunity to correct the record. ClaimBack helps you understand what evidence you need, how to frame your appeal, and what to do at every step.

Start your Unum STD appeal now

Related Reading

• How to Write an Insurance Appeal Letter
• What Is Medical Necessity?
• Common Reasons Insurance Claims Are Denied