DOT Physical Requirements: What Disqualifies You and How to Prepare

A lot of future truck drivers worry about the skills test and never think about the medical exam, until a blood pressure reading turns a two-year card into a three-month one. The DOT physical requirements are federal, they're written down, and most of them are predictable. If you know what the examiner checks and bring the right paperwork, there should be very few surprises. This guide covers the standards, the conditions that cause the most trouble, and the steps that get you from exam room to valid CDL.

What the DOT physical is

The DOT physical is a medical exam required for drivers of commercial motor vehicles in interstate commerce, set out in federal rule 49 CFR 391.41. Anyone applying for a commercial learner's permit or a CDL for that kind of driving needs to pass it and keep it current.

Three facts shape the whole process:

• Only a certified examiner can do it. Since 2014, the exam must be performed by a medical examiner listed on FMCSA's National Registry of Certified Medical Examiners. Your family doctor counts only if they're on the registry.
• The maximum certificate is 24 months. Many drivers get less, depending on conditions that need monitoring.
• You fill out the health history first. The Medical Examination Report form starts with your own answers about conditions, surgeries and medications. Lying on it is a federal problem, not a paperwork slip.

FMCSA's DOT medical exam page has the official forms and the registry search.

DOT physical requirements: vision and hearing

These are the two areas with hard numbers.

If you wear glasses or contacts to pass, your certificate will carry a corrective lens requirement, and you must wear them when driving. The same goes for hearing aids.

Drivers who don't meet the vision standard in one eye now have a path too. Under FMCSA's alternative vision standard, a driver can be evaluated by an ophthalmologist or optometrist on a specific vision form, then certified by the medical examiner, instead of going through the old exemption program.

Blood pressure and certificate length

Blood pressure is the most common reason a driver walks out with a shorter card. Examiners follow FMCSA's guidance, which uses stages:

Once you're being treated for high blood pressure, expect to be certified annually rather than for two years.

How to keep your reading honest

"White coat" readings happen. Things that actually help:

• Take prescribed blood pressure medication on schedule the day of the exam.
• Skip energy drinks, extra coffee and nicotine beforehand.
• Arrive early and sit quietly for a few minutes.
• Ask the examiner whether they'll recheck after rest if the first reading is high.

What doesn't help: trying to "hide" a diagnosis. The examiner will see medications on your history form and may ask for records.

Diabetes, sleep apnea and medications

Insulin-treated diabetes

Insulin use is no longer an automatic disqualification. Since a 2018 rule, your treating clinician completes FMCSA's ITDM Assessment Form (MCSA-5870), and the medical examiner must receive it within 45 days of the clinician signing it. You'll need at least the previous three months of blood glucose records to qualify for the maximum certificate, which for insulin-treated drivers is 12 months. Diabetes controlled by diet or oral medication is evaluated by the examiner without that form.

Sleep apnea

There's no specific sleep apnea rule in the regulations. It falls under the examiner's judgment about conditions that could affect safe driving. If you've been diagnosed and use a CPAP, bring a compliance report from the machine's software showing regular use. Examiners may also refer drivers with risk factors for testing.

Medications and substances

Most prescriptions are fine if they don't impair you. Bring a list of everything you take, including dosages. Some realities to know:

• Marijuana disqualifies you, even with a state medical card or in states where it's legal, because federal rules govern commercial drivers.
• Narcotics, amphetamines and other habit-forming drugs are a problem unless prescribed by a licensed provider who knows your job and says you can drive safely.
• Epilepsy with a clinical diagnosis is disqualifying under the standard; FMCSA runs a separate exemption process.

Ten things that can fail or limit you

To put it all in one place, these are the issues most likely to cost you a full card:

1. Vision worse than 20/40 in an eye without an approved alternative evaluation
2. A horizontal field of vision under 70 degrees
3. Failing both hearing tests, even with an aid
4. Blood pressure at 180/110 or higher
5. Insulin use without a completed MCSA-5870 on time
6. Untreated or uncontrolled sleep apnea
7. Marijuana or other disqualifying substance use
8. A diagnosis of epilepsy
9. Heart conditions without required clearance from your cardiologist
10. Leaving conditions off your history form

Several of these mean "not yet" rather than "never." Paperwork and treatment can turn a deferral into a card.

Finding a registry examiner

Search FMCSA's National Registry by ZIP code. Examiners include doctors, physician assistants, nurse practitioners and chiropractors who completed the training and certification. Prices aren't set by the government and vary by clinic, so call a few. Some CDL schools and employers send you to a specific clinic and cover the cost.

Bring photo ID, your glasses or hearing aids, your medication list and any specialist paperwork. Expect a urine test at the exam; it checks for indicators like protein and sugar and is separate from the DOT drug test a carrier may require.

Submitting your medical card to the state

This changed in 2025. Starting June 23, 2025, examiners send exam results to FMCSA electronically, and FMCSA forwards them to state licensing agencies for CLP applicants and CDL holders. In states that have made the switch, you no longer carry a paper certificate to the DMV. A few states were slower to implement, so confirm with your state licensing agency whether it still wants a paper copy, and track your expiration date. Letting your medical certification lapse can lead the state to downgrade your CDL.

Once your medical is handled, focus on the knowledge tests. Our CDL practice tests cover general knowledge, air brakes and combination vehicles. For the whole path, read how to get a CDL permit and how to get a CDL, and budget with how much a CDL costs.

Frequently asked questions

What disqualifies you from a DOT physical?

Common disqualifiers include vision or hearing below the federal standards, blood pressure at 180/110 or higher until it's controlled, a diagnosis of epilepsy, and marijuana or other prohibited drug use. Many other conditions are evaluated case by case.

How long is a DOT medical card good for?

Up to 24 months. Examiners issue shorter certificates, often 1 year or less, when a condition like high blood pressure or insulin-treated diabetes needs monitoring.

How much does a DOT physical cost?

There's no federal price. Fees are set by each clinic, so call examiners near you for quotes, and ask whether your CDL school or employer covers it.