The CDL medical exam is a physical and vision test required by the Federal Motor Carrier Safety Administration before you can drive a commercial truck

To hold a valid commercial driver's license (CDL), you must pass a medical examination performed by a certified medical examiner — a doctor, nurse practitioner, or physician assistant listed on the FMCSA National Registry. This exam is not optional; without it, your CDL cannot be issued or renewed. The exam checks your physical ability to operate a commercial vehicle safely, focusing on vision, hearing, blood pressure, and certain medical conditions that could impair your driving.

The exam itself takes 30 to 60 minutes and costs between $75 and $200, depending on your location and the examiner. You pay the examiner directly; there is no government fee. Once you pass, the examiner issues a Medical Examiner's Certificate (also called a MECN or medical certificate), which is valid for two years. You must carry this certificate with you while driving commercially, and you must renew it before it expires.

Key Takeaways

  • The medical exam must be performed by an FMCSA-certified examiner, not your regular doctor, and you can find certified examiners through the FMCSA National Registry online.
  • The exam tests vision (at least 20/40 in each eye), hearing, blood pressure, and screens for conditions like diabetes, heart disease, and sleep apnea that could affect safe driving.
  • Your Medical Examiner's Certificate is valid for two years and must be renewed before expiration; driving commercially without a valid certificate is a violation.
  • Certain medical conditions may disqualify you temporarily or permanently, but many can be managed with treatment or a waiver from the FMCSA.

What the Medical Examiner Will Check During Your Exam

The FMCSA publishes a standard form called the Medical Examination Report for Commercial Driver License Applicants (MCSA-5875). Every certified examiner uses this form, so the exam is consistent across the country. The examiner will review your medical history, take your blood pressure, test your vision and hearing, and perform a physical examination of your heart, lungs, abdomen, and nervous system.

Vision requirements are strict: you must have at least 20/40 vision in each eye, with or without correction (glasses or contacts). Your field of vision must be at least 70 degrees in the horizontal meridian in each eye. Hearing is tested at 40 decibels in a quiet environment; if you fail, you may still pass if you can communicate effectively with others. Blood pressure limits vary by age and medical history, but generally readings above 160/100 will result in a temporary disqualification until you bring it under control.

The examiner will also ask detailed questions about your medical history: past surgeries, current medications, sleep disorders, diabetes, heart conditions, seizures, and mental health treatment. You must answer honestly. Lying on the medical form is a federal offense and can result in criminal charges, fines, and permanent CDL revocation.

Medical Conditions That May Affect Your CDL Status

Certain conditions trigger automatic disqualification or require special review. Sleep apnea is one of the most common reasons for denial or conditional approval; if you have been diagnosed or show signs of it, the examiner may require a sleep study before issuing your certificate. Diabetes controlled by insulin also requires special handling — you may need a waiver or a statement from your doctor confirming your condition is stable.

Other conditions that may disqualify you include uncontrolled high blood pressure, heart disease, a history of heart attack or stroke, epilepsy or other seizure disorders, and certain psychiatric medications. However, disqualification is not always permanent. Many examiners will issue a conditional certificate or require you to obtain a waiver from the FMCSA if your condition is manageable. For example, if your blood pressure is slightly elevated, the examiner may retest you in 30 days rather than deny you outright.

If you are denied, the examiner will provide a written explanation and tell you what steps you can take to reapply. You have the right to request a second opinion from another certified examiner, and you can appeal a denial to the FMCSA if you believe the decision was wrong.

How to Find a Certified Medical Examiner

The FMCSA maintains the National Registry of Certified Medical Examiners online at fmcsa.dot.gov. You can search by state, city, or ZIP code to find examiners near you. The registry shows each examiner's name, location, phone number, and whether they are currently accepting new patients. Many examiners are family medicine doctors or occupational health clinics; some work at urgent care centers or truck driver medical clinics.

Call ahead to schedule an appointment. Some examiners have long wait times, especially in rural areas or during busy seasons. Ask about the cost upfront and whether they accept your insurance (many do not, since this is a commercial requirement rather than a standard medical service). Bring your current driver's license, proof of residence, and a list of any medications you take.

Do not use your regular primary care doctor unless they are on the FMCSA registry. A medical exam from a non-certified doctor will not be accepted, and you will have to pay for another exam with a certified examiner.

What Happens After You Pass the Exam

Once you pass, the examiner will issue your Medical Examiner's Certificate on the spot or mail it to you within a few days. The certificate shows your name, the examiner's name, the date issued, and the expiration date (two years from the issue date). You must carry this certificate with you whenever you operate a commercial vehicle. A police officer or FMCSA inspector can ask to see it during a traffic stop or roadside inspection.

Your certificate is tied to your CDL; if your CDL expires, your medical certificate expires with it. However, your medical certificate can expire before your CDL does. If that happens, you cannot legally drive commercially until you renew the medical certificate. Some states allow you to renew your CDL and medical certificate at the same time; others require separate appointments.

Keep a copy of your certificate in your vehicle and another at home. If you lose it, you can request a replacement from the examiner or from your state's CDL office, though this may take several weeks.

Renewing Your Medical Certificate Before It Expires

You should schedule your renewal exam at least 30 days before your certificate expires. The renewal process is identical to the initial exam — you see a certified examiner, undergo the same physical and vision tests, and receive a new certificate if you pass. There is no separate "renewal" form; the examiner uses the same MCSA-5875 form.

If your certificate expires before you renew it, you are no longer legally permitted to drive commercially, even if you have an appointment scheduled. Your employer may also face penalties for allowing you to drive without a valid certificate. Some states offer a grace period of a few days, but this is not may provide, so do not wait until the last minute.

If your medical situation has changed since your last exam — for example, you have been diagnosed with a new condition or started a new medication — tell the examiner before the exam begins. This gives them time to review your history and decide whether additional testing or documentation is needed.

What to Do If You Are Denied or Conditionally Approved

If the examiner denies your certificate, they must provide a written statement explaining why and what medical evidence or treatment would allow you to reapply. For example, if you were denied because of high blood pressure, the examiner might say you can reapply after your doctor confirms your blood pressure is controlled. Keep this statement; it tells you exactly what you need to do next.

If you receive a conditional certificate, it means you passed but with restrictions or requirements. For example, you might be required to wear corrective lenses, use a hearing aid, or provide a letter from your doctor every year confirming your condition is stable. Follow these conditions exactly; violating them can result in CDL suspension.

If you disagree with a denial, you can request a second opinion from another certified examiner at your own expense. You can also file an appeal with the FMCSA, though this process is lengthy and requires medical documentation supporting your case. Contact your state's CDL office for information on how to file an appeal.

Frequently Asked Questions

Can my regular doctor perform the CDL medical exam?

No. Your doctor must be listed on the FMCSA National Registry of Certified Medical Examiners. If your regular doctor is not certified, you must see a different doctor for the CDL exam. You can search the registry online at fmcsa.dot.gov to find certified examiners in your area.

What if I have a medical condition like diabetes or high blood pressure?

Many conditions do not automatically disqualify you. The examiner will review your medical history and may issue a conditional certificate, require a waiver, or ask for documentation from your doctor showing your condition is controlled. Be honest about your health history; the examiner is looking for safety, not reasons to deny you.

How long is the Medical Examiner's Certificate valid?

The certificate is valid for two years from the date it is issued. You must renew it before it expires; driving commercially without a valid certificate is illegal. Schedule your renewal appointment at least 30 days before expiration to avoid a gap in your driving authorization.

What happens if my medical certificate expires while my CDL is still valid?

You cannot legally drive commercially until you renew your medical certificate, even if your CDL has not expired. Your employer may also face penalties. Renew your medical certificate before it expires to avoid losing driving privileges.

Can I appeal if I am denied a medical certificate?

Yes. The examiner will explain why you were denied and what you need to do to reapply. You can also request a second opinion from another certified examiner or file an appeal with the FMCSA if you believe the decision was incorrect. Contact your state's CDL office for details on the appeal process.