Diabetes and Your CDL Physical: What Drivers Need to Know in 2026

By Dr. David Jacobsen, DC — FMCSA-Certified Medical Examiner, OneCare CDL, Daytona Beach, FL

Here's one of the most common things I hear from drivers before their DOT physical: "Doc, I have diabetes. Does that mean I'm going to lose my CDL?"

The short answer is — for most drivers, no. Diabetes does not automatically disqualify you from holding a commercial driver's license. But it's also not a condition you can ignore or walk into the exam unprepared for. After 40+ years of examining commercial drivers, I can tell you that the difference between a driver who gets certified and a driver who doesn't usually comes down to one thing: preparation.

This guide covers exactly what you need to know about the DOT physical and diabetes in 2026 — what the examiner looks at, how diabetes affects your certification, and what to bring with you on exam day.

Does Diabetes Disqualify You from a DOT Physical?

Not automatically — and this is where a lot of drivers get the wrong information. The FMCSA distinguishes between different types of diabetes management, and the rules vary depending on how your condition is treated.

Type 2 Diabetes — Diet or Oral Medication

If your diabetes is managed through diet alone or with oral medications (like metformin), you are generally eligible for CDL certification under standard guidelines. The examiner will assess your overall condition, review your blood sugar control, and look at any complications that might affect your ability to drive safely.

This is the most common scenario I see in my exam room. Most drivers in this group can be certified — often for a full two-year card — when their condition is well-controlled and documented.

Insulin-Treated Diabetes — The Federal Exemption Program

This is where things get more complicated. Historically, drivers who used insulin to manage diabetes were disqualified from operating commercial motor vehicles in interstate commerce. That's changed — but it requires an extra step.

The FMCSA Federal Diabetes Exemption Program allows insulin-treated drivers to obtain a federal exemption that permits them to drive in interstate commerce. To qualify, you must:

• Have a stable insulin regimen and demonstrate good blood sugar control
• Have no severe hypoglycemic episodes in the past 12 months
• Have a treating endocrinologist or physician evaluate you and complete the required FMCSA forms (MCSA-5870). This form is required and must be completed and signed by your treating doctor prior to your physical. It must be brought in on the day of your CDL physical and must have been completed no more than 45 days before your CDL physical.
• Form MCSA-5870 will need to be completed for each new physical (Certification: 1 year).
• Download the form online. Go to FMCSA and enter MCSA-5870 in the search box).

What Does the Examiner Actually Check?

When a driver with diabetes comes in for their DOT physical, here's what I'm evaluating:

Blood Sugar (Urinalysis)

Every DOT physical includes a urine sample. I check for glucose in the urine, which can indicate uncontrolled blood sugar. This is a standard part of the exam — not a special diabetes screening.

Cardiovascular Health

Diabetes significantly increases the risk of heart disease. I'll assess your blood pressure, heart rate, and listen for any concerning signs. Elevated blood pressure is itself a consideration at the DOT physical, and the two conditions together require careful review.

Vision

Diabetic retinopathy is a real concern. The DOT physical includes a vision check, and I look at whether diabetes may be affecting your eyesight. If you've been treated for retinopathy, bring documentation from your eye doctor.

Neurological Function

Peripheral neuropathy — nerve damage in the feet and hands — is a complication of poorly controlled diabetes. I check reflexes and sensation as part of the standard neurological exam.

Medical History and Medications

I'll review your current medications, your A1C history if you bring it (more on that below), and whether you've had any hypoglycemic episodes that could affect driving safety.

Diabetes & Your CDL: What to Bring to the Exam

Being organized on exam day makes a real difference. Here's a practical checklist for drivers managing diabetes:

Before Your Exam, Gather These Documents:

• ✅ Recent A1C results — ideally from the past 3–6 months. A1C shows your average blood sugar over time and helps establish that your condition is well-controlled.
• ✅ Current medication list — include all prescriptions, doses, and how long you've been on each.
• ✅ Treating physician's notes — a letter or recent visit summary from your primary care doctor or endocrinologist can support your certification.
• ✅ FMCSA Diabetes Exemption documentation — if you are insulin-treated and have your federal exemption, bring the exemption letter. This requirement was replaced by having Form MCSA-5870 completed by your doctor.
• ✅ Eye exam records — if you've been seen for diabetic retinopathy or any diabetes-related vision concern, bring those records.
• ✅ Any specialist records — cardiologist, nephrologist, neurologist — if diabetes has affected other systems, bring documentation showing those conditions are managed.
• ✅ List of hypoglycemic episodes — if you've had any in the past year, be ready to discuss them honestly. No episodes, or well-managed ones, is a positive indicator.

The more documentation you bring, the better position you're in. Don't wait for the examiner to ask — come ready.

Common Questions Drivers Ask About Diabetes and DOT Physicals

"Do I have to tell the examiner I have diabetes?"

Yes. The DOT physical form (MCSA-5875) asks directly about diabetes and medications. Failing to disclose a medical condition is a serious compliance issue and can put your CDL at risk.

"Will my A1C number automatically disqualify me?"

No. There is no specific A1C cutoff in FMCSA regulations. What matters is the overall picture — how well your condition is controlled, whether you have complications, and whether those complications affect your ability to drive safely.

"Can I get a same-day medical card if I have diabetes?"

For drivers with well-controlled, non-insulin-treated diabetes who bring proper documentation, yes — same-day certification is possible at our Daytona Beach clinic. If your condition requires further review or specialist follow-up, the examiner may defer certification pending additional records.

"What if my diabetes is causing other health issues?"

This depends entirely on what those issues are and how well-managed they are. Drivers with diabetes-related complications — kidney disease, heart disease, vision problems — aren't automatically disqualified, but those conditions will be evaluated individually. See our guide to DOT physical disqualifications for more detail on how secondary conditions are assessed.

How OneCare CDL Approaches Diabetic Drivers

I've been certifying commercial drivers since 1985. In that time, I've examined thousands of drivers managing diabetes — and the vast majority of them are still on the road.

The goal at OneCare CDL is never to look for reasons to disqualify a driver. It's to help every driver understand where they stand and what they need to do to get — and stay — certified. If you come in prepared, we can work through the exam efficiently, address any questions about your specific situation, and get you back behind the wheel as quickly as possible.

For drivers who need more than a single exam cycle — whether that's a shorter certification period for monitoring, or referrals to specialists — I'll give you a clear roadmap. No surprises. No medical jargon you have to decode later.

You can learn more about what the full CDL physical covers at our CDL physicals overview, or review the 2026 DOT physical requirements before your exam.

Preparing for Your DOT Physical? Start Here.

If you have diabetes and you're due for a DOT physical — or you're applying for your CDL for the first time — the best thing you can do is come prepared and book with an experienced examiner who understands how to work with drivers managing chronic conditions.

At OneCare Works in Daytona Beach, FL, Dr. Jacobsen brings over four decades of FMCSA-certified examination experience to every driver who walks through the door. We'll review your documentation, walk you through what the exam covers, and work to get you certified the same day whenever possible.

Ready to get your DOT physical handled right? Schedule your exam at OneCare CDL today.

For tips on how to prepare for every part of the DOT physical — not just diabetes — check out our guide: How to Pass Your DOT Physical: Tips from an FMCSA-Certified Examiner.