If your long-term disability claim has been denied, the first question to answer is why. Insurers are required to give you a written reason, but the language in denial letters is often technical, vague, or deliberately narrow. Understanding the specific ground your insurer is relying on is not just useful  – it is the essential starting point for building a challenge that actually works.

This hub covers the most common denial reasons in detail, with dedicated guides for each one explaining what the insurer is arguing and what claimants can do to push back.

The Most Common Reasons Disability Claims Are Denied

Insufficient medical evidence. This is the single most frequent basis for denial. The insurer is not necessarily saying you are not sick – they are saying the documentation you submitted does not adequately prove the functional limitations that prevent you from working. Closing these gaps with the right medical records, physician statements, and objective testing is often the key to a successful appeal. Our guide to insufficient medical evidence denials explains what insurers are looking for and how to provide it.

Pre-existing condition exclusions. Most group LTD policies exclude disabilities that are linked to conditions you had before your coverage began. Insurers sometimes apply these exclusions broadly, capturing conditions that were not meaningfully related to your current claim. Our guide to pre-existing condition denials explains how these exclusions work and the arguments available to challenge them.

Failing to meet the policy definition of disabled. LTD policies define “disability” in specific, often restrictive terms – typically tied to your ability to perform your own occupation, any occupation, or some form of gainful work. If the insurer concludes your condition does not meet that definition, it is often the centerpiece of the denial. Our guide to not meeting the policy definition of disability breaks down how these definitions are applied and contested.

Surveillance evidence. Insurers sometimes use video surveillance, social media monitoring, or private investigators to gather evidence that they argue contradicts your claimed limitations. These tactics are legal but frequently misrepresent the reality of living with a disabling condition. Our guide to surveillance used in disability denials explains how this evidence is used and how claimants can effectively respond.

Missed or inconsistent medical treatment. If there are gaps in your treatment history, or if your insurer believes you are not following prescribed treatment, they may use this as grounds for denial. Our guide to missed medical treatment denials addresses what insurers look for and how to explain treatment history in a way that supports your claim.

Paper review denials. Many insurers deny claims based solely on a review of your file by an in-house or contracted physician – without ever examining you. These paper reviews are widely criticized but remain common. Our guide to paper review denials explains how to identify this tactic and what evidence helps counter it most effectively.

Mental health limitations clauses. Most LTD policies impose a 24-month benefit limit on disabilities classified as primarily mental health conditions. Insurers sometimes use this clause aggressively, reclassifying physical conditions with mental health components to cap or terminate benefits. Our guide to mental health disability limitations explains how these clauses are applied and how to challenge a misclassification.

Drug and alcohol exclusions. Policies commonly exclude or limit benefits where substance use is a contributing factor in the disability. Our guide to drug and alcohol exclusion denials covers how these exclusions work, when they apply, and when they can be contested.

Identifying Your Denial Type Is Step One

Each of these denial types requires a different response. The guides above are designed to help you identify exactly what your insurer is arguing and take targeted, effective action – whether that means gathering additional evidence, challenging a policy interpretation, or preparing a formal appeal.