CDL Medical Card Requirements: DOT Physical Guide

What Is a DOT Medical Card?

A DOT medical card (formally called a Medical Examiner's Certificate) is a document proving that you meet the physical qualifications to safely operate a commercial motor vehicle. It is required for all CDL holders and must be kept current at all times while you are driving commercially.

The medical card is issued after you pass a DOT physical examination performed by a certified medical examiner (CME) listed on the FMCSA National Registry of Certified Medical Examiners. The exam evaluates your vision, hearing, blood pressure, cardiovascular health, respiratory function, neurological condition, and overall physical ability to drive a commercial vehicle safely.

Medical cards are valid for up to 24 months, though the examiner may issue a shorter validity period if you have a condition that requires more frequent monitoring (diabetes, hypertension, etc.). Some drivers receive cards valid for only 3, 6, or 12 months.

The exam costs $75 to $200, and the cost is not always covered by employers or insurance. Walk-in occupational health clinics, urgent care centers, chiropractors, and some primary care physicians perform DOT physicals. Not every doctor can do it — they must be listed on the FMCSA National Registry.

What Happens During the DOT Physical

The DOT physical is a standardized exam that takes 30 to 60 minutes. Here is what the medical examiner evaluates.

Vision: You must have at least 20/40 acuity in each eye (with or without corrective lenses), a field of vision of at least 70 degrees in each eye, and the ability to distinguish traffic signal colors (red, green, amber). If you wear glasses or contacts, bring them. If you cannot meet these standards, you may be eligible for a Federal Vision Exemption, though the process is lengthy.

Hearing: You must be able to perceive a forced whisper at 5 feet or pass an audiometric test showing adequate hearing in at least one ear. Hearing aids are permitted.

Blood pressure: The standard is below 140/90 for a full 24-month card. Readings of 140-159/90-99 get a one-year card. Readings of 160-179/100-109 require treatment and recertification in 3 months. Readings at or above 180/110 are disqualifying until treated and controlled. If you have high blood pressure, start managing it before your exam.

Urinalysis: The exam includes a urine test for sugar and protein (indicators of diabetes and kidney disease). This is NOT a drug test — the DOT drug screen is a separate, employer-required test. However, do not assume the examiner will not notice signs of substance use.

Physical examination: The examiner checks your heart, lungs, abdomen, spine, and extremities. They assess your range of motion, grip strength, and neurological function. You need to be able to demonstrate that you can physically perform the duties of a commercial driver — climbing in and out of the cab, securing cargo, and operating vehicle controls.

Common Disqualifying Conditions

Several medical conditions can disqualify you from receiving a medical card, though many have exemption pathways. Here are the most common issues.

Diabetes requiring insulin: This was an automatic disqualification until the FMCSA created the insulin-treated diabetes mellitus (ITDM) exemption program. If you use insulin, you can still qualify by demonstrating stable blood sugar control, maintaining an A1C below 10%, providing documentation from your treating physician, and monitoring blood glucose before and during driving. The process takes time, so start well before you need your card.

Epilepsy and seizure disorders: Any history of epilepsy or unprovoked seizures is disqualifying. The FMCSA Seizure Exemption Program may grant an exemption if you have been seizure-free for 8 or more years, are on stable medication or no medication, and have a neurologist's endorsement.

Cardiovascular conditions: Heart attack within the past 2 years, implanted cardiac defibrillator, and certain heart rhythm disorders are disqualifying. Coronary bypass surgery, angioplasty, and pacemakers may be compatible with driving after appropriate recovery periods and medical clearance.

Sleep apnea: Not automatically disqualifying, but untreated sleep apnea can prevent certification. If diagnosed, you must demonstrate compliance with treatment (usually CPAP). Many examiners screen for sleep apnea based on BMI, neck circumference, and reported symptoms.

Vision loss in one eye: Drivers with monocular vision (one functional eye) can obtain a Federal Vision Exemption after demonstrating they have sufficient driving experience and an acceptable safety record.

Mental health conditions: Anxiety and depression are not automatically disqualifying if well-managed. However, certain psychiatric conditions and medications that impair driving ability can prevent certification. Discuss your specific situation with the examiner.

How to Prepare for Your DOT Physical

Preparation can make the difference between a smooth exam and a failed one. Start preparing at least 2 weeks before your appointment.

Manage your blood pressure. Blood pressure is the most common reason for reduced certification periods or failure. If your BP tends to run high, reduce sodium intake, increase physical activity, manage stress, and take any prescribed medications consistently for at least 2 weeks before the exam. Avoid caffeine and nicotine on exam day. Some drivers take a blood pressure medication specifically for the exam — discuss this with your primary care physician.

Bring all medical documentation. If you have any ongoing conditions, bring records from your treating physician documenting your condition, treatment plan, and compliance. This includes CPAP usage reports for sleep apnea, blood sugar logs for diabetes, medication lists, and surgical records. Having documentation ready prevents delays and return visits.

Know your medication list. Write down every medication you take, including dosage, frequency, and prescribing doctor. The examiner will review your medications for any that are incompatible with commercial driving. Common problematic medications include narcotic pain medications, benzodiazepines (Xanax, Valium), certain muscle relaxants, and any medication that causes drowsiness.

Get adequate sleep the night before. Fatigue can temporarily elevate blood pressure and affect your performance on the vision and hearing tests. Arrive well-rested and hydrated.

Wear appropriate clothing. You will need to remove your shirt for the cardiovascular and respiratory portions of the exam. Wear layers you can easily remove. Bring your glasses or contacts, hearing aids, and any required medical devices.

Maintaining Your Medical Card and Self-Certification

Your medical card must be kept current at all times. Driving commercially with an expired medical card is an out-of-service violation and can result in fines, CSA points, and CDL suspension. Set a reminder 60 days before expiration to schedule your renewal exam.

Self-certification: When you get or renew your CDL, you must self-certify your type of driving operation. The four categories are: Interstate (non-excepted) — requires a medical card on file with the DMV. Interstate (excepted) — certain government and farm operations, no medical card required. Intrastate (non-excepted) — requires a medical card per state rules. Intrastate (excepted) — certain state-defined exceptions.

Most CDL holders fall into the Interstate non-excepted category and must submit their medical card to their state DMV. If your medical card expires and your DMV does not have a current one on file, your CDL will be downgraded to a regular (non-commercial) license — meaning you cannot legally drive commercially.

If your health changes between exams, you have a legal obligation to report conditions that could affect driving safety. A new diagnosis of a disqualifying condition requires recertification. Hiding a disqualifying condition is a federal violation that can result in CDL revocation and personal liability in the event of an accident.

Keep a copy of your medical card in your vehicle at all times and another copy in a safe place at home. Digital copies on your phone can serve as backup but may not be accepted during a roadside inspection in all jurisdictions.

Saving Money on DOT Physicals

DOT physical costs vary significantly by provider and location, ranging from $75 at walk-in clinics to $200+ at some medical offices. Here are strategies to minimize costs.

Compare prices. Call at least 3 providers in your area and ask for their DOT physical price. Occupational health clinics and urgent care centers are typically cheaper than primary care physicians or hospital-affiliated practices. Truck stops and trucking-specific clinics often offer competitive pricing because they perform DOT physicals in high volume.

Check if your employer covers the cost. Many carriers reimburse DOT physical costs or have designated providers that offer the exam at no cost to drivers employed with them. Ask your employer before scheduling independently.

Use your insurance if applicable. Some health insurance plans cover DOT physicals as a preventive or occupational health benefit. Check with your insurance provider — it is often listed under occupational medicine or preventive care rather than standard office visits.

Maintain your health year-round, not just before the exam. Consistently managing blood pressure, blood sugar, and weight means fewer restricted certificates, fewer follow-up appointments, and less likelihood of needing specialist documentation that adds cost.

Schedule your renewal early. Last-minute scheduling limits your options and may result in higher costs from providers who charge premium rates for urgent appointments. Schedule 4 to 6 weeks before expiration to have time to address any issues that arise during the exam.