Medically reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatric Surgeon — Balance Foot & Ankle, Howell & Bloomfield Hills, MI. Last updated April 2026.

Medical Review

Medically Reviewed By: Dr. Thomas Biernacki, DPM

Board Certified: American Board of Foot and Ankle Surgery

Last Updated: April 2026

Evidence Level: Clinical review with cited sources

Quick Answer: What Happens at a Diabetic Foot Exam

A diabetic foot exam is a comprehensive evaluation of sensation, circulation, skin integrity, biomechanics, and footwear that identifies problems before they become limb-threatening emergencies. Diabetes damages both the nerves (peripheral neuropathy) and blood vessels (peripheral arterial disease) of the feet, creating a dangerous combination where injuries go undetected because the patient cannot feel them and heal poorly because blood supply is compromised. The American Diabetes Association recommends annual comprehensive foot exams for all patients with diabetes, with more frequent monitoring for those with identified risk factors. At Balance Foot & Ankle, our diabetic foot exam follows a structured protocol that assesses every component of foot health and stratifies patients by risk level to determine appropriate follow-up intervals.

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Table of Contents

• Why Diabetic Foot Exams Matter
• Neurological Assessment
• Vascular Assessment
• Skin & Nail Assessment
• Musculoskeletal & Biomechanical Assessment
• Most Common Mistake
• Risk Stratification & Follow-Up
• Daily Foot Care at Home
• Best Insoles for Diabetic Feet
• Skin Protection & Wound Prevention
• Compression for Diabetic Feet
• Complete Diabetic Foot Care Kit
• Warning Signs
• Video: Diabetic Foot Exam
• Frequently Asked Questions
• Sources
• Schedule an Appointment

Why Diabetic Foot Exams Save Limbs

Diabetes-related foot complications remain the leading cause of non-traumatic lower limb amputation worldwide. The statistics are sobering: approximately 15% of people with diabetes will develop a foot ulcer during their lifetime, and of those who develop ulcers, roughly 14–24% will ultimately require amputation. These numbers are not inevitable—they are largely preventable with structured foot surveillance and early intervention. Studies consistently demonstrate that comprehensive diabetic foot exam programs reduce amputation rates by 50–85% through early identification of risk factors and timely management of pre-ulcerative changes.

The pathological cascade from diabetes to amputation follows a predictable sequence: peripheral neuropathy eliminates protective sensation, peripheral arterial disease compromises healing capacity, and biomechanical deformity (Charcot foot, hammertoes, bunions) creates areas of elevated pressure. When these three factors converge—the patient cannot feel the injury, the blood supply cannot heal it, and the foot structure keeps loading it—a minor skin breakdown rapidly progresses to deep infection, osteomyelitis, and ultimately amputation. The purpose of the diabetic foot exam is to identify and interrupt each of these pathological components before they converge into catastrophe.

Neurological Assessment: Testing Protective Sensation

The neurological assessment is the cornerstone of the diabetic foot exam because loss of protective sensation (LOPS) is the single strongest predictor of future ulceration. We use the Semmes-Weinstein monofilament test as the primary screening tool—a calibrated 5.07/10-gram nylon monofilament is applied to specific plantar sites on the foot, and the patient reports whether they can feel the pressure. Inability to detect the 10-gram monofilament indicates clinically significant loss of protective sensation and places the patient in a high-risk category for ulceration.

The monofilament test is supplemented by additional neurological assessments. The 128Hz tuning fork test evaluates vibration perception—loss of vibratory sense correlates with large-fiber neuropathy and impaired proprioception (position sense), which increases fall risk and contributes to Charcot foot development. Deep tendon reflexes at the ankle (Achilles reflex) are assessed, as diminished or absent reflexes indicate sensorimotor neuropathy. We also evaluate light touch discrimination, temperature perception, and the presence of neuropathic symptoms including burning, tingling, numbness, and electric-shock sensations—the hallmarks of diabetic peripheral neuropathy.

Autonomic neuropathy assessment completes the neurological evaluation. Diabetic autonomic neuropathy affects the sympathetic nerves controlling sweat glands and microcirculation in the feet. The classic findings are anhidrotic (dry, cracked) skin—particularly on the heels and plantar surface—and loss of the normal vasomotor tone that regulates skin temperature. These autonomic changes create a skin barrier that is prone to fissuring and bacterial entry, representing an independent risk factor for infection and ulceration that requires specific management with daily moisturizing and skin inspection protocols.

Vascular Assessment: Checking Blood Flow

Adequate blood flow is essential for wound healing, infection control, and tissue viability. Peripheral arterial disease (PAD) affects approximately 29% of patients with diabetes and significantly increases the risk of non-healing wounds and amputation. The vascular assessment begins with palpation of the dorsalis pedis and posterior tibial pulses—diminished or absent pulses suggest significant arterial disease that may require vascular surgery consultation.

The ankle-brachial index (ABI) provides an objective, quantitative measure of lower extremity arterial perfusion. A blood pressure cuff is placed at the ankle and the systolic pressure is compared to the brachial (arm) pressure. Normal ABI is 1.0–1.3. An ABI below 0.9 indicates peripheral arterial disease, and values below 0.5 indicate severe arterial insufficiency that may threaten limb viability. It is important to note that medial arterial calcification—common in long-standing diabetes—can falsely elevate ABI values, making the vessels incompressible. In these cases, toe pressures or transcutaneous oxygen measurements (TcPO2) provide more reliable perfusion data.

We also assess for clinical signs of vascular compromise: prolonged capillary refill time (greater than 3 seconds), dependent rubor (redness when the foot hangs down that blanches with elevation), absence of hair growth on the toes and dorsal foot, and skin temperature asymmetry. These clinical findings, combined with the objective ABI measurement, determine whether the patient needs vascular referral for further evaluation with arterial duplex ultrasound or angiography.

Skin & Nail Assessment

Every square centimeter of the foot is inspected during the skin assessment—dorsal, plantar, between each toe, the heel, and around the nail margins. We look for pre-ulcerative changes including callus formation (indicating areas of elevated pressure), skin fissures (especially on the heels, which provide bacterial entry points), maceration between toes (a common site for fungal infection and ulceration), discoloration (erythema suggesting inflammation or pressure injury), and blisters or hemorrhage beneath calluses (indicating shear forces that precede ulcer formation).

Nail assessment evaluates for onychomycosis (fungal nail infection), which affects up to 35% of diabetic patients and creates thickened, dystrophic nails that can injure adjacent toes or become ingrown. Ingrown toenails in diabetic patients require careful management because the inflammatory response and potential for secondary infection carry a disproportionate risk of complications when sensation and circulation are compromised. We assess nail cutting technique and provide education on proper straight-across trimming to prevent ingrown borders.

Musculoskeletal & Biomechanical Assessment

Structural foot deformities create focal areas of elevated plantar pressure that, in the insensate foot, lead to callus buildup and eventually ulceration. The musculoskeletal assessment identifies these high-risk deformities including hallux valgus (bunions), hammertoe and claw toe deformities, Charcot neuroarthropathy (rocker-bottom deformity), prominent metatarsal heads, and bony prominences from prior surgery or trauma. Each deformity is mapped to its corresponding pressure point and correlated with callus distribution to identify areas at highest risk for skin breakdown.

Joint range of motion is assessed, with particular attention to ankle dorsiflexion. Limited ankle dorsiflexion (equinus) is extremely common in diabetic patients due to glycosylation of the Achilles tendon and is one of the most important modifiable risk factors for forefoot ulceration. When the ankle cannot dorsiflex adequately during gait, compensatory overload of the metatarsal heads occurs, dramatically increasing forefoot plantar pressure. Gastrocnemius-soleus stretching and, in selected cases, gastrocnemius recession surgery can reduce forefoot pressures by 25–40%.

Footwear assessment is an integral part of the biomechanical evaluation. We examine the patient’s shoes for adequate width, depth, support, and condition. Inappropriate footwear is implicated in up to 50% of diabetic foot ulcerations—shoes that are too narrow, too shallow, or worn out create the mechanical forces that drive skin breakdown in the insensate foot. We provide specific footwear recommendations and, for high-risk patients, prescription for Medicare therapeutic shoes and custom-molded insoles under the Diabetic Shoe Program.

Most Common Mistake with Diabetic Foot Care

🔑 Key Takeaway: The most common mistake we see is patients with diabetes waiting until they have a wound to see a podiatrist. By that point, the pathological cascade of neuropathy, vascular disease, and biomechanical overload has already converged—and the treatment shifts from prevention to wound salvage. Annual diabetic foot exams identify risk factors before wounds develop, allowing us to implement protective measures such as orthotic insoles, footwear modification, callus management, and nail care that interrupt the progression from risk factor to amputation. The second mistake is “bathroom surgery”—patients attempting to trim calluses, corns, or ingrown nails at home. In the insensate foot, self-treatment carries an unacceptable risk of accidental skin puncture, which in the presence of PAD can rapidly progress to infection and hospitalization. All foot maintenance in diabetic patients should be performed by a podiatrist.

Risk Stratification & Follow-Up Intervals

After completing the comprehensive exam, we assign each patient a risk category that determines follow-up frequency and treatment intensity. Category 0 (Low Risk): Intact sensation, palpable pulses, no deformity—annual comprehensive exam with daily self-inspection education. Category 1 (Moderate Risk): Loss of protective sensation OR peripheral arterial disease OR structural deformity—exam every 3–6 months with orthotic intervention and enhanced footwear. Category 2 (High Risk): Loss of protective sensation WITH deformity OR PAD—exam every 2–3 months with prescription footwear, custom insoles, and regular callus management. Category 3 (Very High Risk): History of prior ulcer or amputation—exam every 1–2 months with ongoing wound prevention protocol.

Daily Foot Care Protocol at Home

Between professional exams, daily self-care is the patient’s most important line of defense. The daily protocol begins with visual inspection—examine the entire foot including between all toes, the plantar surface (use a mirror or smartphone camera if flexibility is limited), the heels, and around the nails. Look for redness, swelling, blisters, calluses, cracks, color changes, temperature asymmetry, or any new finding. Report anything unusual to your podiatrist before the next scheduled visit.

Skin care involves daily moisturizing of the feet with a diabetic-appropriate emollient—apply to the tops, bottoms, and heels but NOT between the toes (moisture between toes promotes maceration and fungal infection). Wash feet daily in lukewarm water (test with the elbow, not the foot, since neuropathic feet cannot reliably assess temperature) and dry thoroughly, especially between toes. Never soak feet—prolonged soaking macerates the skin and increases infection risk. Never walk barefoot, even inside the house—insensate feet cannot detect sharp objects, hot surfaces, or rough textures that can cause injury.

Best Insoles for Diabetic Feet

Pressure redistribution through orthotic insoles is the primary biomechanical intervention for diabetic foot ulcer prevention. The insensate foot generates the same plantar pressures as a normal foot but lacks the pain feedback that triggers protective unloading responses. Where a person with normal sensation shifts weight away from a painful pressure point, the neuropathic patient continues loading the same area until the skin breaks down. Orthotic insoles redistribute pressure across a larger surface area, reducing the peak forces at vulnerable sites to levels below the ulceration threshold.

PowerStep Pinnacle Insoles provide an excellent foundation for diabetic foot protection in patients without severe deformity. The semi-rigid arch support distributes midfoot loading to reduce forefoot pressure peaks, the heel cradle stabilizes the calcaneus and offloads the plantar heel, and the dual-layer cushioning system absorbs ground reaction forces at every step. For diabetic patients with intact sensation (Category 0), PowerStep insoles in properly fitting shoes provide the biomechanical support needed to prevent the progression of pressure-related changes.

For patients in higher risk categories (Category 1–3) with loss of protective sensation, structural deformity, or history of ulceration, custom-molded insoles through the Medicare Diabetic Shoe Program provide patient-specific pressure redistribution that accounts for individual foot morphology and deformity patterns. However, even these patients benefit from PowerStep insoles in their backup and casual footwear—the shoes they wear when not using their prescription diabetic shoes. Consistent biomechanical support across all footwear is more effective than perfect support in one pair of shoes and none in the others.

Skin Protection & Wound Prevention

Maintaining the skin barrier is paramount for diabetic foot health. Autonomic neuropathy eliminates normal sweating, leaving the skin dry, brittle, and prone to cracking—particularly on the heels and plantar surface where mechanical stress is highest. Heel fissures are a common entry point for bacterial infection in diabetic feet, and even a superficial crack in the skin can progress rapidly to cellulitis and deeper infection when immune response is compromised by hyperglycemia and peripheral arterial disease.

Doctor Hoy’s Natural Pain Relief Gel serves a dual purpose for diabetic patients. While the primary indication is pain management, the topical application also provides anti-inflammatory benefit to areas of chronic low-grade inflammation from pressure overload—the pre-ulcerative state that precedes skin breakdown. For diabetic patients who retain some sensation and experience discomfort from calluses, metatarsalgia, or neuropathic pain, Doctor Hoy’s provides targeted relief without the systemic effects of oral analgesics that may interact with diabetes medications.

The Doctor Hoy’s Arnica Boost Recovery Cream complements the daily moisturizing protocol for diabetic feet. Applied to the dorsal and plantar surfaces at bedtime (avoiding between the toes), it provides both the tissue support of arnica compounds and the emollient properties that help maintain skin hydration. For patients with dry, cracked heels, nightly application followed by thin cotton socks creates an occlusive environment that accelerates skin barrier restoration while the arnica compounds support tissue integrity.

Compression for Diabetic Feet: Important Considerations

Compression therapy in diabetic patients requires careful consideration of vascular status before application. Graduated compression is beneficial for reducing lower extremity edema, improving venous return, and supporting tissue health—but in patients with significant peripheral arterial disease (ABI below 0.7), compression can further compromise an already limited arterial blood supply. This is why vascular assessment with ABI measurement is a prerequisite before recommending any compression garment for diabetic patients.

DASS Performance Compression Socks are appropriate for diabetic patients with confirmed adequate arterial circulation (ABI 0.9–1.3) who experience lower extremity edema. Many diabetic patients develop dependent edema from a combination of venous insufficiency, medication side effects (particularly calcium channel blockers), and autonomic dysfunction. This edema compromises skin integrity by stretching the dermis, reducing oxygen diffusion to the skin surface, and creating a moist environment that promotes bacterial colonization. DASS graduated compression counteracts these effects by promoting venous return and reducing the edema that threatens skin health.

Important: Diabetic patients should only use compression socks after their podiatrist or vascular specialist has confirmed adequate arterial circulation through ABI testing or other vascular assessment. Do not use compression if you have peripheral arterial disease with ABI below 0.7, active foot ulcers, or skin infections. The DASS compression level is appropriate for most diabetic patients with adequate circulation, but always verify with your healthcare provider before starting any compression therapy.

Complete Diabetic Foot Care Kit

✅ Our Complete Diabetic Foot Care Kit:

1. PowerStep Pinnacle Insoles — Plantar pressure redistribution to reduce ulceration risk at high-pressure sites
2. Doctor Hoy’s Natural Pain Relief Gel — Topical anti-inflammatory support for pressure-related discomfort and skin barrier maintenance
3. DASS Performance Compression Socks — Edema control to maintain skin integrity (requires vascular clearance—confirm ABI above 0.9 with your podiatrist before use)

This kit provides daily biomechanical protection, skin support, and edema management for diabetic feet. PowerStep reduces the mechanical forces that cause calluses and ulcers, Doctor Hoy’s supports skin health and manages discomfort, and DASS controls the edema that compromises skin integrity. Combined with daily self-inspection and regular podiatric exams, this comprehensive approach significantly reduces the risk of diabetic foot complications.

Warning Signs: When to Call Your Podiatrist Immediately

🚨 Contact your podiatrist immediately—do not wait for your next appointment—if you notice:

• Any open wound, blister, or skin break on the foot (no matter how small)
• New redness, warmth, or swelling in the foot or ankle
• Drainage or foul odor from any area of the foot
• Color changes—darkening, blue/purple discoloration, or pallor
• Sudden increase in foot or ankle swelling
• Red streaking up the foot or leg (potential ascending infection)
• Fever or chills with any foot symptom (systemic infection)
• New deformity—sudden flattening of the arch or change in foot shape (possible Charcot foot)
• Ingrown toenail with redness or drainage

In diabetic feet, what appears minor can become limb-threatening within 24–48 hours. When in doubt, call. Early intervention saves limbs.

Video: Diabetic Foot Exam Explained

Watch Dr. Biernacki walk through the complete diabetic foot exam process, including the neurological testing, vascular assessment, and risk stratification protocol used at Balance Foot & Ankle.

Frequently Asked Questions About Diabetic Foot Exams

How often should a diabetic have a foot exam?

The American Diabetes Association recommends a comprehensive foot exam at least annually for all patients with diabetes. Patients with identified risk factors—loss of protective sensation, peripheral arterial disease, structural deformity, or history of ulceration—need more frequent exams ranging from every 1–6 months depending on their risk category. Your podiatrist will determine the appropriate follow-up interval based on your specific risk profile.

What does a podiatrist check during a diabetic foot exam?

A comprehensive diabetic foot exam evaluates four major systems: neurological (sensation testing with monofilament and tuning fork), vascular (pulse palpation and ankle-brachial index), dermatological (skin and nail inspection for pre-ulcerative changes), and musculoskeletal (structural deformity, joint range of motion, and footwear assessment). The results are used to assign a risk category that determines follow-up frequency and treatment intensity.

Does Medicare cover diabetic foot exams?

Yes, Medicare covers diabetic foot exams and routine foot care for patients with diabetes and documented peripheral neuropathy or peripheral vascular disease. The Medicare Diabetic Shoe Program also covers one pair of therapeutic shoes and three pairs of custom insoles per calendar year for qualifying patients. Our office handles the Medicare documentation and billing for these services—patients simply need to bring their diabetes diagnosis confirmation and any previous vascular or neurological test results.

Can I trim my own toenails if I have diabetes?

Patients with intact sensation and adequate circulation (Category 0) can safely trim their own nails using proper technique—cut straight across, not too short, and file any sharp edges with an emery board. Patients with loss of protective sensation (Category 1 and above) should have their nails trimmed by a podiatrist. The risk of accidental skin puncture during self-nail care is too high when you cannot feel the instrument contacting skin, and even a minor nick can become a serious infection in the diabetic foot.

What shoes should a diabetic wear?

Diabetic patients should wear shoes with adequate depth (to accommodate deformities and insoles), wide toe boxes (to prevent pressure on toes), firm heel counters (for stability), and removable insoles (to allow orthotic insertion). Avoid pointed-toe shoes, high heels, flip-flops, and any shoe that causes pressure or friction. For patients in higher risk categories, the Medicare Diabetic Shoe Program provides prescription therapeutic footwear designed specifically for diabetic foot protection. PowerStep insoles in properly fitting shoes provide excellent biomechanical support for lower-risk patients.

Sources

1. American Diabetes Association. Standards of Medical Care in Diabetes—2026: Microvascular complications and foot care. Diabetes Care. 2026;49(Supplement_1):S275-S290.
2. Boulton AJM, Armstrong DG, Kirsner RS, et al. Diagnosis and management of diabetic foot complications. Diabetes/Metabolism Research and Reviews. 2020;36(S1):e3280.
3. Bus SA, Lavery LA, Monteiro-Soares M, et al. Guidelines on the prevention of foot ulcers in persons with diabetes (IWGDF 2023 update). Diabetes/Metabolism Research and Reviews. 2024;40(3):e3651.
4. Singh N, Armstrong DG, Lipsky BA. Preventing foot ulcers in patients with diabetes. JAMA. 2005;293(2):217-228.
5. Crawford F, Cezard G, Chappell FM, et al. A systematic review and individual patient data meta-analysis of prognostic factors for foot ulceration in people with diabetes. Diabetologia. 2015;58(3):427-439.

Related Articles

• Podiatrist Recommended Foot Care Products 2026
• Diabetic Neuropathy: Foot Treatment Guide
• Diabetic Wound Care & Healing
• Charcot Foot: Diagnosis & Treatment

Schedule Your Diabetic Foot Exam at Balance Foot & Ankle

When was your last comprehensive diabetic foot exam? If it has been more than 12 months—or if you have never had one—schedule an appointment with Dr. Biernacki at Balance Foot & Ankle. Our structured exam protocol identifies risk factors early, and our team provides ongoing foot care including nail trimming, callus management, and Medicare Diabetic Shoe Program services.

📞 Call (248) 410-1019 | 📅 Book Online

Serving Southeast Michigan: Novi, Farmington Hills, Livonia, Northville, Plymouth, South Lyon, and surrounding communities.

Diabetic Foot Exams at Balance Foot & Ankle

Regular diabetic foot exams are essential for preventing ulcers, infections, and amputations. Our podiatrists provide comprehensive diabetic foot care at our Howell and Bloomfield Hills offices — early detection saves limbs and lives.

Learn About Diabetic Foot Care | Book Your Appointment | Call (810) 206-1402

Clinical References

1. Boulton AJM, et al. Comprehensive foot examination and risk assessment. Diabetes Care. 2008;31(8):1679-1685. doi:10.2337/dc08-9021
2. Singh N, et al. Preventing foot ulcers in patients with diabetes. JAMA. 2005;293(2):217-228. doi:10.1001/jama.293.2.217
3. American Diabetes Association. Microvascular complications and foot care: Standards of Medical Care in Diabetes — 2024. Diabetes Care. 2024;47(Suppl 1):S231-S243.