The CDL physical is a medical exam required by the Federal Motor Carrier Safety Administration (FMCSA) before you can drive a commercial truck or bus for pay

You cannot get a CDL without passing this exam first. The physical checks whether you have conditions that would make you unsafe behind the wheel of a large vehicle — things like uncontrolled high blood pressure, vision problems, hearing loss, or seizure disorders. A licensed medical examiner (not your regular doctor) performs the exam and fills out the FMCSA Medical Examination Report form, which your state's DMV then uses to issue or renew your CDL.

The exam itself takes 30 to 60 minutes and costs between $75 and $200 depending on where you live and which clinic you use. You will need to bring your current driver's license, proof of citizenship or legal residency, and any medical records related to conditions the examiner asks about. The medical certificate you receive is valid for two years, though some conditions require annual recertification.

Key Takeaways

  • The FMCSA physical is mandatory before you can obtain a CDL, and you must use a medical examiner certified by your state — your regular doctor cannot perform this exam.
  • The exam tests vision, hearing, blood pressure, and checks for disqualifying conditions like uncontrolled diabetes, heart disease, or a history of seizures.
  • You receive a medical certificate valid for two years if you pass, though some conditions require you to return annually for recertification.
  • Finding a certified examiner in your area is usually faster through your state's DMV website or by calling your local CDL testing facility.

What the examiner checks during the physical

The medical examiner will test your vision to make sure you can see at least 20/40 in each eye (with or without correction) and have a field of vision of at least 70 degrees in each eye. You will also be tested for color blindness and the ability to recognize red, green, and amber traffic lights. If you wear glasses or contacts, bring them with you.

Hearing is tested next — you need to be able to hear a forced whisper at three feet away in at least one ear. The examiner will take your blood pressure (it cannot exceed 160/100 for a first-time certificate) and check your heart rate and rhythm. You will be asked about your medical history, including any surgeries, medications, or conditions like diabetes, heart disease, sleep apnea, or mental health treatment.

The physical exam itself includes checking your reflexes, balance, and coordination. The examiner will look for signs of substance abuse and may ask about your sleep habits if you report fatigue or drowsiness. If you have a condition that might affect your driving — such as epilepsy, a recent stroke, or uncontrolled high blood pressure — you may be referred to a specialist before the examiner can certify you.

Conditions that can disqualify you or require special review

The FMCSA maintains a list of medical conditions that either automatically disqualify you or require additional documentation and specialist evaluation. Uncontrolled diabetes, a history of heart attack or stroke, and certain seizure disorders fall into this category. If you have been treated for a mental health condition involving loss of consciousness or loss of control, you will need medical records and possibly a letter from your treating doctor.

Sleep apnea is one of the most common reasons for referral — if you have been diagnosed or the examiner suspects it based on your symptoms, you will need a sleep study before certification. Hearing aids are permitted, but you must be able to hear the forced whisper test with or without them. If you take medications that affect alertness or judgment, the examiner will review whether they are safe for commercial driving.

Some conditions do not automatically disqualify you but require annual recertification instead of the standard two-year certificate. These include insulin-dependent diabetes, certain cardiac conditions, and some neurological disorders. The examiner will tell you at the time of your exam if this applies to you.

How to find a certified medical examiner

Your state's DMV or commercial driver's license division maintains a list of certified FMCSA medical examiners in your area. Most states post this list online, searchable by county or city. You can also ask at your local CDL testing facility — they often have a list of nearby examiners or can refer you to one.

Call ahead to confirm the examiner is currently accepting new patients and to ask about cost and what documents you should bring. Some examiners are faster than others, and if you are on a timeline to get your CDL, it is worth calling a few to find one with short wait times. Many examiners work in occupational health clinics, truck stops, or independent medical offices.

What happens after you pass the physical

The examiner will give you a copy of the FMCSA Medical Examination Report form and send a copy to your state's DMV. You will use this form when you take your CDL written and skills tests at the DMV. The medical certificate is valid for two years from the date of the exam, though you should check your state's rules — some states require you to renew your CDL before the medical certificate expires.

If you fail the physical, the examiner will explain which condition or test result caused the failure and whether it can be addressed. For some issues (like high blood pressure), you may be able to retest after a certain period. For others (like a disqualifying medical condition), you will need specialist evaluation or treatment before you can try again.

Preparing for your exam

Bring your current driver's license, proof of citizenship or legal residency (passport, birth certificate, or naturalization papers), and any medical records related to conditions you have reported. If you take medications, bring a list or the bottles themselves so the examiner can review them. If you wear glasses or contacts, bring them — you cannot pass the vision test without correction if you normally wear it.

Avoid caffeine and strenuous exercise for a few hours before the exam, as these can temporarily raise your blood pressure. If you have high blood pressure, try to schedule the exam when you are calm and rested. If you know you have a condition that might require specialist review, gather any relevant medical records beforehand — this can speed up the process.

Frequently Asked Questions

Can my regular doctor perform the CDL physical?

No. Only a medical examiner certified by your state's DMV or transportation department can perform the FMCSA physical. Your regular doctor can provide medical records or letters if you have a condition that needs specialist review, but they cannot complete the official exam form.

What if I fail the physical — can I retake it?

It depends on why you failed. If the issue is temporary (like high blood pressure on exam day), you may retake it after a waiting period, usually 30 to 60 days. If you have a disqualifying condition, you will need medical treatment or specialist clearance before you can retake the exam.

How long is the medical certificate valid?

The certificate is valid for two years from the date of the exam. Some conditions require annual recertification instead. Check your exam results to see if annual recertification applies to you.

Do I need to pass the physical before I take the CDL written test?

You need the medical certificate before your state will issue your CDL, but some states allow you to take the written test before the physical. Check your state's DMV website to confirm the order of steps in your state.

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

These conditions do not automatically disqualify you. The examiner will review your medical records and current treatment. If your condition is controlled with medication, you may pass. If it is uncontrolled, you will be referred for specialist evaluation or treatment before certification.