How a DOT Physical Works
A no-fluff guide for CDL drivers. What's tested, what to bring, and what's changed.
What is a DOT physical?
A DOT physical is the medical exam every commercial driver must pass to operate a commercial motor vehicle in the U.S. It's required by the Federal Motor Carrier Safety Administration (FMCSA) and performed by a certified medical examiner on the FMCSA National Registry.
It's not a deep-dive physical. The exam confirms you're medically fit to safely operate a heavy truck.
Who needs one
- Drivers with a CDL operating in interstate commerce
- Drivers of vehicles with a GVWR over 10,001 lbs
- Drivers transporting 16 or more passengers (including the driver)
- Drivers hauling hazardous materials in placarded quantities
What's tested
- Vision — 20/40 in each eye (with correction). 70° peripheral.
- Hearing — Forced whisper at 5 feet, with hearing aid if needed.
- Blood pressure — Under 140/90 for a 2-year card. Higher levels mean shorter cards or disqualification.
- Urine test — Checks for glucose, protein, blood, and specific gravity. Not a drug test.
- Physical exam — Heart, lungs, neuro, abdomen, extremities, spine.
- Medical history review — You'll be asked about conditions, surgeries, medications.
What changed in June 2025
As of June 23, 2025, all certified examiners must file your DOT physical results electronically with FMCSA's National Registry within one calendar day (NRII).
Practical impact for drivers: you no longer need a paper medical card to give your state DMV. The certificate flows automatically. Some examiners still print one for your records, but it's no longer the official document.
How long the card is valid
Up to 24 months. If you have managed conditions (BP, diabetes, sleep apnea), you may get a 1-year, 6-month, or 3-month card. The examiner sets the duration based on how stable your condition is.
What happens if you fail
The examiner gives you a written explanation. Most reasons are fixable:
- BP over 180/110 → see your doctor, get on medication, retest.
- Suspected sleep apnea → sleep study and CPAP, then retest.
- Vision under 20/40 → corrective lenses, possible exemption.
You can re-test as soon as the issue is addressed. Going to a different examiner is allowed and won't be flagged.
FAQ
Who needs a DOT physical?+
Anyone driving a commercial motor vehicle that crosses state lines, has a gross vehicle weight rating over 10,001 lbs, transports 16+ passengers (incl. driver), or carries hazardous materials requiring placards.
How long is a DOT card valid?+
Up to 24 months for healthy drivers. Drivers managing high blood pressure, diabetes, or sleep apnea may receive shorter certifications.
What changed in June 2025?+
FMCSA's National Registry Information Improvement (NRII) requires examiners to file results electronically within one calendar day. Drivers no longer need to bring a paper card to the DMV.
What happens if I fail?+
You'll get a written explanation of why. Most reasons are fixable — get the issue under control with your doctor and re-test.