Long-term disability (LTD) claims are denied more often than many policyholders expect. Understanding the most common reasons for denial is useful whether you are still in the claims process, waiting for a decision, or have already received an adverse determination.

Knowing why insurers reject claims can help you identify where your own claim may have vulnerabilities and what steps can address them.

This article covers the principal reasons disability insurers deny long-term disability claims, including medical evidence problems, policy definition issues, administrative errors, and investigative activity that leads insurers to question the validity of a claim. For a broader overview of the basics, see our guide to long-term disability denial page.

The Policy Definition of Disability

One of the most frequently misunderstood aspects of long-term disability insurance is that the word ‘disabled’ in everyday language does not determine eligibility – the policy’s specific definition does. Most long-term disability policies use one of two primary definitions.

During an initial benefit period – typically the first 24 months of a claim – many policies define disability as the inability to perform the material duties of the claimant’s own occupation. Under this standard, a surgeon who can no longer operate due to hand tremors but could theoretically perform administrative work would still meet the definition, because the question is whether they can perform their own occupation.

After that initial period, most policies shift to an ‘any occupation’ standard, under which the claimant must be unable to perform any occupation for which they are reasonably suited by education, training, or experience. This is a significantly harder standard to satisfy, and many claims that were approved under the own-occupation definition are later terminated when the any-occupation standard kicks in.

Insurers deny claims under the any-occupation definition by pointing to vocational assessments identifying occupations the claimant could theoretically perform – even if those occupations are significantly lower in pay or status, and even if the claimant has never worked in those fields.

Insufficient Medical Evidence

Insufficient medical evidence is the single most common reason for long-term disability claim denial. The insurer’s position is typically that the medical records submitted do not establish that the claimant’s functional limitations are severe enough to prevent full-time employment.

This often occurs not because a claimant is not genuinely disabled, but because the treating physician’s records do not document functional limitations in sufficient detail. Clinical notes that record symptoms, medication adjustments, and treatment plans are medically appropriate records, but they rarely contain the kind of specific, work-relevant functional assessments that insurers require.

A physician who writes ‘patient reports chronic low back pain, continue medication’ has documented the condition. But that note does not tell the insurer how long the patient can sit, how far they can walk, whether they can lift a certain amount of weight, or how pain affects their ability to concentrate or maintain a regular work schedule. Insurers use this evidentiary gap as a basis for denial.

For more detail on this specific denial ground, see our article on insufficient medical evidence denial.

Independent Medical Examinations and Peer Reviews

When an insurer disagrees with a claimant’s treating physician – or simply wants a second opinion – it can arrange an independent medical examination (IME) or a peer review. In an IME, a physician selected and compensated by the insurer examines the claimant. In a peer review, a physician reviews the claim file without ever meeting the claimant.

The physicians who perform these reviews are typically paid by the insurer on an ongoing basis, which creates a financial incentive to support the insurer’s position. Studies and litigation have shown that IME and peer review physicians tend to reach conclusions favorable to the insurer at a higher rate than treating physicians.

When an insurer-arranged reviewer concludes that the claimant can return to work, that conclusion becomes the basis for a denial. Treating physicians often express strong disagreement with these findings, but under ERISA, courts have historically given plan administrators broad discretion to favor the opinions of their own reviewers, particularly in policies that grant discretionary authority to the plan administrator.

Surveillance and Claim Investigations

Insurers conduct surveillance on disability claimants, particularly in longer-running claims or those involving conditions whose severity is difficult to verify objectively, such as chronic pain, fibromyalgia, or mental health conditions. Surveillance may take the form of direct observation by a private investigator, video recording in public spaces, or investigation of social media accounts.

If a surveillance report or social media review documents activity that appears inconsistent with the claimant’s reported limitations – such as footage of a claimant mowing the lawn or a photograph posted on social media of the claimant at a social event – the insurer may cite that evidence as grounds for denial or termination.

This evidence is frequently misinterpreted. A claimant with a degenerative spinal condition may be capable of mowing the lawn for 20 minutes on a good day while still being unable to maintain full-time employment. A photograph taken at a family gathering reveals nothing about the claimant’s functional capacity over the course of an eight-hour workday, five days a week. These contextual factors are often ignored in the initial claim review but can be addressed effectively on appeal.

Administrative and Procedural Errors

Some claims are denied not on the merits but because of procedural or administrative failures. These include submitting the claim after the policy’s deadline for filing, failing to provide requested documentation within specified timeframes, not submitting proof of continued disability at required intervals, gaps in treatment that the insurer characterizes as evidence the claimant is no longer disabled, or coverage lapses due to missed premium payments.

If your claim was denied for an administrative reason, the first question is whether the procedural failure was actually yours or was the product of a miscommunication, a failure by your employer or physician to submit required forms, or an error on the insurer’s part. Administrative denials can sometimes be resolved more efficiently than denials based on the merits, particularly when documentation errors are straightforward to correct.

Mental Health and Behavioral Condition Exclusions

Many long-term disability policies contain provisions that limit the duration of benefits for claims arising primarily from mental or nervous conditions – typically to 24 months of benefits regardless of whether the claimant remains disabled. Some policies exclude these conditions entirely.

Insurers sometimes apply these limitations to conditions that have a significant physical component, arguing that the disabling condition is primarily psychiatric or behavioral in nature. This approach is particularly common with conditions like chronic fatigue syndrome, fibromyalgia, and post-traumatic stress disorder, where the boundary between physical and psychological impairment is genuinely contested.

If your claim was denied or limited under a mental health exclusion or limitation and you believe the primary disabling condition is physical, that classification issue should be a central focus of the appeal.

Failure to Meet Elimination Period Requirements

Long-term disability policies require claimants to be continuously disabled for a specified period before LTD benefits begin. This period – commonly called the elimination period or waiting period – is typically 90 to 180 days, though it can range from 30 to 365 days depending on the policy.

If an insurer determines that the claimant returned to work, had insufficient earnings loss, or was not continuously disabled throughout the elimination period, it may deny the claim on that basis. Accurately documenting the onset date and continuous nature of disability from the start of the claims process is essential.

Pre-Existing Condition Exclusions

Disability policies typically contain a pre-existing condition exclusion that prevents a claimant from receiving benefits for a condition that was diagnosed or for which treatment was received during a specified look-back period before coverage began. The look-back period is commonly three to twelve months, and the exclusion period – during which the pre-existing condition limitation applies – is often twelve to twenty-four months after the policy effective date.

If an insurer can link the disabling condition to a pre-existing diagnosis or treatment, it will deny the claim under this exclusion. For more on this type of denial and how it intersects with the policy’s definition of disability, see our article on not disabled policy definition.

Steps Claimants Can Take After a Denial

Understanding the reason for the denial is the starting point for any response. Once you have identified the specific ground or grounds, gather the evidence and documentation needed to address each one directly. Request your complete claim file so you can see exactly what information the insurer had and what it relied on.

If the denial was based on insufficient medical evidence, work with your treating physicians to obtain detailed functional capacity statements and narrative reports. If it was based on an insurer-arranged medical review, obtain a rebuttal from your treating physician or an independent specialist. If it was based on surveillance, prepare a written explanation of the activities depicted and their context.

Filing a timely administrative appeal is the required next step under ERISA before any litigation can be pursued. The appeal should address every basis for denial that the letter identified and should include new evidence wherever possible.

Conclusion

Long-term disability claims are denied for a variety of reasons, ranging from medical evidence deficiencies to policy definition disputes to administrative errors. Many of these denial grounds can be addressed through a well-prepared administrative appeal that targets the specific basis for the insurer’s decision. Identifying exactly why a claim was denied – and what evidence would correct that deficiency – is the necessary first step in challenging an adverse determination.