What Are Diabetic Amputations and Foot Ulcers?
Diabetic peripheral neurovascular disease — the combination of nerve damage (neuropathy) and poor circulation (peripheral arterial disease) — sets the stage for foot ulcers that refuse to heal, tissue death (gangrene), and ultimately amputation. Diabetes is the leading cause of non-traumatic lower-limb amputation in the United States, accounting for the majority of such procedures every year.
Even without amputation, chronic non-healing ulcers can be severely disabling on their own. Open wounds that persist for months require constant care, restrict mobility, carry serious infection risk, and frequently keep people out of any workplace where standing, walking, or exposure to contaminants is required.
The loss of protective sensation from neuropathy means many patients don't notice a blister, cut, or pressure injury until it has already progressed to a deep ulcer or infection. By the time the wound is discovered, the underlying vascular disease may make healing nearly impossible — and the cycle from ulcer to infection to amputation can move quickly.
How Amputations Qualify for Disability
Amputations are evaluated under Listing 1.20 (Amputation Due to Any Cause). The listing recognizes four alternative criteria — meeting any one of them is enough to qualify:
Amputation of both upper extremities
Amputation of both upper extremities at or above the wrists.
Hemipelvectomy or hip disarticulation
Hemipelvectomy or hip disarticulation — the highest level of lower-extremity amputation.
One upper and one lower extremity
Amputation of one upper and one lower extremity, with documented inability to use the remaining upper extremity or need for an assistive device for the remaining lower extremity.
Lower-extremity amputation with no usable prosthesis
Amputation of one or both lower extremities at or above the ankle, with inability to use a prosthetic device and documented medical need for a walker, bilateral canes/crutches, or a wheelchair.
For chronic non-healing ulcers without amputation, the claim is evaluated under Listing 8.09 (Skin Disorders) if the lesions persist 3+ months despite treatment and cause functional limitations. Wounds with deep tissue involvement may also be evaluated under Listing 1.00 for soft-tissue injuries.
Evidence SSA Needs to See
Amputation claims rely on documentation of the level of limb loss, prosthetic usability, and the surrounding vascular and wound history. Here's what the SSA looks for:
| Evidence Type | What It Shows | How to Get It |
|---|---|---|
| Surgical Records | Documents amputation level, date, reason, and complications. | Hospital/surgeon records. |
| Prosthetic Evaluation | Documents ability or inability to use prosthesis and reasons. | Prosthetist or physiatrist. |
| Wound Care Records | Tracks non-healing ulcers — size, depth, location, treatment, duration. | Podiatrist, wound care specialist. |
| Vascular Studies | Shows peripheral arterial disease contributing to poor healing. | Vascular surgeon. |
| Physical Therapy Records | Documents functional limitations, gait analysis, assistive device needs. | Physical therapist. |
| Imaging (X-ray/MRI) | Shows bone involvement (osteomyelitis) in diabetic foot infections. | Ordering physician. |
RFC Impact: How Amputations and Ulcers Limit Work
Even where the Listing isn't met, the functional consequences of amputation and chronic ulcers carry significant weight in an RFC analysis. These are the limitations the SSA evaluates:
| Limitation | How Amputation / Ulcers Cause It |
|---|---|
| Mobility / ambulation | Limited walking distance; cannot stand for prolonged periods. |
| Standing endurance | Pressure on prosthesis or affected limb causes pain, skin breakdown. |
| Balance | Loss of proprioception and altered gait increase fall risk. |
| Need for assistive devices | Walker / cane / wheelchair affects every job requiring movement. |
| Phantom limb pain | Chronic neuropathic pain after amputation can be severe and limit concentration. |
| Wound care time requirements | Daily dressing changes, debridement appointments, hyperbaric oxygen therapy. |
| Infection risk in work environments | Open wounds + healthcare/food-service workplaces = unsafe. |
What Your Doctor Needs to Document
- Anatomic level of amputation — "Below-knee amputation, left lower extremity, at mid-tibial level."
- Prosthetic usability — explicit statement on whether the patient can use a prosthesis and what assistive devices are medically required.
- Wound duration — for ulcer-based claims, 3+ months continuous documentation with sizes and treatment history.
- Vascular status of remaining extremities — ABI, toe pressures, evidence of compromised limbs.
- Functional limitations — walking distance, standing tolerance, balance issues.
Pro tip
For Listing 1.20D claims, the explicit documentation that the patient CANNOT use a prosthesis and requires a walker/cane/wheelchair is what separates an approved claim from a denied one. Don't assume — get the prosthetist or physiatrist to put it in writing.
Common Mistakes
Not documenting inability to use prosthesis
Listing 1.20D requires explicit medical documentation that the patient cannot use a prosthetic device.
Failing to track ulcer duration
Listing 8.09 needs 3+ continuous months of documented non-healing.
Not connecting vascular disease to diabetes in records
The cause-and-effect chain (diabetes → neuropathy + PAD → ulcers → amputation) needs to be explicit in the chart.