Quick Answer
A DOT physical is the medical exam every CMV driver must pass, performed only by a certified medical examiner on the FMCSA's National Registry. It checks vision (20/40 in each eye, 70° peripheral field, glasses allowed), hearing (forced-whisper at 5 feet or audiometry, aids allowed), blood pressure, urinalysis for kidney indicators — not drugs — plus medical history and a physical exam. A clean exam earns a certificate good for up to 24 months; monitored conditions like managed hypertension commonly earn shorter cards.
Key Takeaways
- Only a National Registry–certified medical examiner can perform the exam — verify the examiner before booking.
- Maximum certificate is 24 months; conditions under monitoring (blood pressure, diabetes, sleep apnea treatment) typically mean 12-month or shorter cards.
- The urinalysis screens kidney health markers, not drugs — drug testing is a separate program tracked in the Clearinghouse.
- Certification is going electronic: examiners transmit results to FMCSA, flowing to state CDL records — carry proof during the transition and never let the card lapse.
What the exam covers
Vision. At least 20/40 acuity in each eye and both together (corrective lenses fine), 70 degrees of peripheral vision per eye, and the ability to distinguish traffic-signal colors.
Hearing. Perceive a forced whisper at 5 feet in at least one ear, or pass the audiometric alternative. Hearing aids are allowed.
Blood pressure and pulse. The gatekeeping number for more drivers than any other. Well-controlled pressure earns full-length cards; elevated readings earn shorter certificates with recheck requirements, and high readings can mean no card until it's managed. If you know your numbers run hot, work on them before exam day, not in the parking lot.
Urinalysis. Screens for protein, blood, and sugar — kidney and diabetes indicators. It is not a drug test; DOT drug testing is a separate program under the Clearinghouse.
History and physical. Medications, surgeries, sleep apnea risk factors, cardiovascular history, neurological conditions, plus the hands-on exam. Insulin-treated diabetes is certifiable today under the ITDM standard with proper documentation from your treating clinician; seizure conditions and certain cardiac events carry specific waiting periods and requirements.
How long the card lasts
Up to 24 months is the ceiling. Examiners routinely issue 12-month (or shorter) certificates for conditions they want monitored — controlled hypertension being the classic. A short card isn't punishment; it's the mechanism that keeps a manageable condition from becoming a disqualification.
The electronic era
FMCSA has been phasing in electronic medical certification: examiners transmit results directly, and certification status flows to your state CDL record rather than living on a paper card alone. The transition has had waiver periods where paper cards serve as interim proof for a window after issuance — carry your card, confirm your state's current handling, and treat the days around expiration with zero slack. An expired med cert doesn't just bench you; it can cascade into CDL downgrade problems that take weeks to unwind.
Exam-day practicality
Bring your license, glasses or hearing aids you use, your medication list, and documentation for any monitored condition (recent readings, specialist letters, CPAP compliance data if applicable). Sleep normally, skip the triple espresso — caffeine and no sleep both show up in a blood pressure cuff — and book renewal 30–45 days before expiration so a recheck never becomes a lapse.
Educational content, not medical or legal advice. Standards and waivers change — confirm current requirements at FMCSA.gov and with a certified medical examiner.
FAQ
Q: Is the DOT physical urine test a drug test?
A: No — it screens kidney and diabetes indicators (protein, blood, sugar). DOT drug testing is a separate program with its own rules and Clearinghouse reporting.
Q: Why did I get a 1-year card instead of 2?
A: Examiners issue shorter certificates to monitor conditions like elevated blood pressure or treated sleep apnea. Manage the condition and document it, and full-length cards return.
Q: Can I drive while renewing an expired medical card?
A: No — an expired certificate means you're not medically qualified, and lapses can trigger CDL downgrade processes at the state. Renew 30–45 days early, every time.
