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May-Thurner Syndrome and Disability Benefits: What Your Claim Needs to Show

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May-Thurner syndrome can qualify you for long-term disability (LTD) or Social Security disability benefits, but the diagnosis alone will not get a claim approved. What wins these claims is evidence that the condition, its complications, or its treatment keeps you from doing your job. This article explains how May-Thurner syndrome affects work, how disability insurers push back, and what Nick Ortiz looks for when building a claim around it.

What Is May-Thurner Syndrome?

May-Thurner syndrome is a condition in which the right iliac artery presses on the left iliac vein, the main vein that carries blood from the left leg back to the heart. The pressure works like a foot on a garden hose, narrowing the vein so blood has a harder time flowing out of the leg. Doctors also call it iliac vein compression syndrome or Cockett syndrome.

Iliac vein compression itself is common, showing up in roughly 1 in 5 people, and many of those people never have symptoms. The syndrome is slightly more common in women and in adults between 20 and 50. Most people learn they have it only after a blood clot forms in the leg.

What Symptoms Does May-Thurner Syndrome Cause?

Symptoms usually appear in the left leg and can include pain, swelling, a feeling of heaviness, skin discoloration, varicose veins, and open sores (ulcers). Some patients also report venous claudication, a bursting or aching pain in the leg that comes on with walking or exertion. Some women with May-Thurner syndrome develop pelvic congestion syndrome, which causes chronic pelvic pain.

What Complications Can May-Thurner Syndrome Lead To?

The main complication is deep vein thrombosis (DVT), a blood clot in a deep vein of the leg. If part of that clot breaks off and travels to the lungs, it causes a pulmonary embolism, which is a life-threatening emergency.

Over time, poor blood flow can also cause chronic venous insufficiency, where blood pools in the leg veins and leads to swelling, pressure, skin changes, and sores that do not heal. People who have had a DVT can develop post-thrombotic syndrome, a chronic condition in which leg symptoms get worse with prolonged walking or standing, ease with rest, and often feel worse later in the day. For disability purposes, these long-term complications usually matter more than the compressed vein itself.

How Is May-Thurner Syndrome Diagnosed and Treated?

Diagnosis requires imaging that shows the artery compressing the vein. Doctors may use CT scans, MRI, ultrasound, venograms (contrast dye and X-ray), or intravascular ultrasound, which threads a tiny ultrasound probe inside the vein.

Treatment depends on symptoms. People without symptoms usually need no treatment, and mild cases may be managed with compression stockings. More serious cases are often treated with angioplasty and a stent to hold the vein open, and less often with bypass surgery or surgery to reposition the artery. When a clot is present, treatment can include blood thinners (anticoagulants), clot-dissolving medication delivered through a catheter, clot removal (thrombectomy), or a vena cava filter that traps clots before they reach the lungs.

Can May-Thurner Syndrome Keep You From Working?

May-Thurner syndrome keeps some people from working when its complications or treatment limit how long they can stand, walk, or sit, or make their job unsafe. The specific limitation, and how it lines up with your job duties, is what decides the claim.

Why Can Both Standing Jobs and Desk Jobs Be a Problem?

Post-thrombotic syndrome symptoms get worse with prolonged standing and walking, which can rule out jobs such as nursing, retail, teaching, manufacturing, and skilled trades. Desk work is not automatically safe either. Long periods of sitting are a recognized risk factor for May-Thurner problems, and a person who needs to get up frequently or keep a swollen leg elevated during the day may not be able to meet the demands of a full-time sedentary job. Insurers often assume a desk job solves the problem, so the medical records need to address sitting tolerance directly, not only standing tolerance.

How Do Blood Thinners Affect the Ability to Work?

Many people with May-Thurner syndrome take anticoagulants after a clot, sometimes for a long time. The most common risk of any anticoagulant is bleeding, and people on blood thinners face a high risk of internal bleeding, especially in the brain, after a fall or a blow to the head. That risk can matter a great deal for anyone whose job involves ladders, heights, heavy machinery, sharp tools, or driving, even when leg symptoms are well controlled. A doctor’s written restriction tied to anticoagulant use carries far more weight with an insurer than a general mention of the medication.

How Do Disability Insurance Companies Challenge May-Thurner Syndrome Claims?

Insurers tend to attack May-Thurner claims on a few predictable grounds. Knowing them in advance makes it easier to build a record that answers them before a denial ever arrives.

“The Stent Fixed the Problem”

Stenting often improves blood flow, and insurers use that fact to argue that any disability ended once the procedure was done. A successful procedure on imaging does not prove that pain, swelling, or post-thrombotic symptoms went away, and post-thrombotic syndrome is a chronic condition. Follow-up records that describe how you are actually functioning weeks and months after the stent are what answer this argument.

“Lots of People Have This and Work Fine”

Because iliac vein compression shows up in about 1 in 5 people, an insurer’s reviewer may treat the diagnosis as an incidental finding. The response is to keep the claim focused on your symptoms and complications, such as a documented DVT, post-thrombotic syndrome, or venous ulcers, rather than on the anatomy alone.

“There Is No Objective Evidence”

Pain and leg heaviness are hard to measure, and insurers often dismiss them as subjective. Objective support can include ultrasound or venogram findings, documented clot history, measured swelling, photographs of skin changes or ulcers, wound care records, and a functional capacity evaluation that tests how long you can stand, walk, and sit.

“This Is a Pre-Existing Condition”

May-Thurner syndrome is an anatomical variation, so some insurers try to apply a pre-existing condition exclusion. These exclusions generally depend on whether you were treated or diagnosed during a specific lookback period before your coverage began, not on whether the anatomy existed earlier. Many people with May-Thurner syndrome had no symptoms or treatment until a clot appeared, which can defeat this argument. The exact policy language matters, so read it carefully.

“You Can Do Some Other Job”

Many LTD policies pay benefits for the first 24 months if you cannot do your own occupation, then switch to a stricter test of whether you can do any occupation. At that point, insurers commonly point to sedentary jobs. Records documenting sitting limits, the need to elevate your leg, and anticoagulant-related safety restrictions become especially important at this transition.

What Evidence Strengthens a May-Thurner Syndrome Disability Claim?

The strongest claims connect specific medical findings to specific work limitations. Useful evidence includes:

  • Imaging that confirms the diagnosis, along with records of any DVT or pulmonary embolism
  • Procedure notes for stenting, thrombectomy, or other interventions, plus follow-up imaging
  • Treatment notes that describe symptoms over time, not just at a single visit
  • Records of swelling, skin changes, ulcers, and wound care
  • A treating physician’s opinion that lists concrete restrictions, such as how long you can stand, walk, and sit, whether you need to elevate your leg, and which activities are unsafe on blood thinners
  • A functional capacity evaluation where your limitations are disputed
  • A description of your actual job duties, so the restrictions can be measured against them

How Does Social Security Evaluate May-Thurner Syndrome?

Social Security has no listing for May-Thurner syndrome by name. The Social Security Administration (SSA) evaluates its effects under the cardiovascular listings, most often Listing 4.11 for chronic venous insufficiency of a lower extremity.

What Does Listing 4.11 Require?

Listing 4.11 requires chronic venous insufficiency with incompetency or obstruction of the deep venous system, plus one of two findings:

  • Extensive brawny edema covering at least two-thirds of the leg between the ankle and knee, or the lower one-third of the leg between the ankle and hip
  • Superficial varicose veins, stasis dermatitis, and either recurring ulcers or ulcers that have not healed after at least 3 months of prescribed treatment

The edema requirement trips up many claims. SSA defines brawny edema as dense, firm swelling with characteristic skin pigmentation changes, and it states that ordinary pitting edema (swelling that dents when pressed) does not satisfy the listing. If your doctor’s notes simply say “edema” or “swelling,” they may not show what SSA needs.

What If You Do Not Meet the Listing?

Most people with May-Thurner syndrome do not meet Listing 4.11, and that does not end the claim. SSA can still find you disabled based on your residual functional capacity, meaning what you can still do despite your limitations, along with your age, education, and work history. Restrictions on standing, walking, and sitting, along with the need to elevate your leg or take unscheduled breaks, are central to that analysis. Your condition must also have lasted, or be expected to last, at least 12 months. After a recent clot or procedure, SSA may wait up to 3 months to see how you respond to treatment before deciding.

What Happens After a May-Thurner Syndrome Disability Denial?

A denial is not the final word, but the deadlines are strict and they differ by program. For an ERISA-governed LTD claim, you generally have 180 days from receiving the denial letter to file an internal appeal, and that appeal is usually your only chance to add evidence before a court reviews the case. For Social Security disability, you have 60 days from receiving the denial notice to request reconsideration, and SSA assumes you received the notice 5 days after the date printed on it.

Nick Ortiz represents people across the country in LTD appeals and ERISA lawsuits and in Social Security disability claims at the application, reconsideration, and hearing stages. If your May-Thurner syndrome claim was denied, or you are getting ready to file, call Ortiz Law Firm at (888) 321-8131 for a free case evaluation.

Frequently Asked Questions

Is May-Thurner syndrome considered a disability?

May-Thurner syndrome is not automatically a disability. For LTD, the question is whether its symptoms, complications, or treatment stop you from doing your job as your policy defines it. For Social Security, the question is whether it prevents substantial work for at least 12 months. Complications like post-thrombotic syndrome often decide the claim.

Can I get disability benefits after a May-Thurner stent?

Yes, you can still qualify after a stent if symptoms continue. Insurers often argue the stent solved the problem, so your records need to show how you function in the months after the procedure. Ongoing swelling, pain, post-thrombotic syndrome, or restrictions tied to blood thinners can all support a claim after stenting.

Does May-Thurner syndrome meet a Social Security listing?

May-Thurner syndrome has no listing of its own. SSA usually reviews it under Listing 4.11 for chronic venous insufficiency, which requires extensive brawny edema or varicose veins, stasis dermatitis, and recurring or unhealed ulcers. If you do not meet the listing, SSA can still approve your claim based on your functional limitations.

Will a desk job disqualify me from LTD benefits?

Not necessarily. Prolonged sitting can worsen May-Thurner problems, and a need to elevate your leg or take frequent breaks can rule out full-time sedentary work. Under an own-occupation policy, the insurer must also consider your actual job. Your doctor should document sitting limits specifically, since insurers often assume desk work is always possible.

How long do I have to appeal a disability denial?

For an ERISA-governed LTD claim, you generally have 180 days from receiving the denial letter to file an internal appeal. For Social Security disability, you have 60 days from receiving the denial notice to request reconsideration. These are separate deadlines for separate systems, and missing either one can end your claim.

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