A DOT physical checks the areas that matter most for safe driving: vision, hearing, blood pressure, and a urinalysis, plus a review of your health history and a general physical exam. It is focused on your fitness to drive rather than a full medical work-up, and most drivers complete it in about 30 minutes.
Knowing what the exam covers – and what to bring – is the best way to pass on the first visit and avoid a return trip. This page walks through each part of the DOT physical and gives you a checklist to prepare.
What does a DOT physical include?
A DOT physical follows a standardized set of FMCSA checks. The examiner reviews your health history and then evaluates the specific areas tied to safe operation of a commercial vehicle.
The exam covers:
- Health history – current medications, past surgeries, and any conditions you manage
- Vision – acuity, peripheral vision, and the ability to distinguish traffic signal colors
- Hearing – your ability to hear a forced whisper or a measured hearing test
- Blood pressure and pulse
- Urinalysis – screening for underlying medical conditions
- Physical examination – a general head-to-toe check of the systems relevant to driving
What are the vision and hearing requirements?
For vision, drivers generally need at least 20/40 acuity in each eye and both eyes together, with or without correction, along with adequate peripheral vision and the ability to recognize standard traffic signal colors. If you wear glasses or contacts, that is completely fine – just bring them and wear them for the test.
For hearing, you need to be able to perceive a forced whisper at a set distance, or pass a measured hearing test. Hearing aids are permitted; if you use them, bring them to the exam. Drivers who do not meet a standard on the spot are not necessarily disqualified, as there are established pathways for certain vision and hearing situations.
What are the blood pressure requirements?
Blood pressure is checked because it is a common, safety-relevant condition. Lower, well-controlled readings support a longer certification period, while higher readings may result in a shorter-term medical card so your blood pressure can be rechecked sooner.
If you take medication for blood pressure, keep taking it as prescribed and bring the details to your exam. A single high reading from nerves is common, and being relaxed and prepared helps. Managing the condition well is what supports a longer card at your next visit.
What is the urinalysis for?
The DOT urinalysis is not a drug test. It screens for markers of underlying medical conditions – such as elevated sugar or protein – that can be relevant to your health and safety behind the wheel. It is a basic health screen, not a substance test.
DOT drug and alcohol testing is a completely separate process, typically arranged by your employer. Drivers frequently confuse the two, but the urinalysis at your physical serves a different purpose entirely.
What should I bring to my DOT physical?
Bringing the right items keeps your visit short and lets the examiner certify you on the spot. Use this checklist:
- A valid photo ID
- A complete list of your current medications, with dosages and prescribing doctors
- Your glasses or contact lenses, if you wear them
- Your hearing aids, if you use them
- If you have diabetes: recent blood sugar records, and your most recent A1C if available
- If you have high blood pressure or heart disease: relevant records from your treating doctor
- If you use a CPAP machine: your compliance or usage data
- If you have a vision or hearing exemption: the appropriate documentation
How can I prepare for my DOT physical?
The best preparation is simple and health-focused: take your regular medications as prescribed, get a normal night’s sleep, and go easy on caffeine and salt right before the exam, since both can nudge your blood pressure up. Stay hydrated so the urinalysis goes smoothly.
There is no way to “cheat” a DOT physical, and trying to hide a condition can backfire – the goal is an accurate picture of your health so you are safe on the road. If you manage a condition, come prepared with documentation rather than hoping it goes unnoticed. That is what lets a certified examiner certify you confidently.
DOT physicals in St. Peters, MO
Crosby Chiropractic & Acupuncture Centre performs DOT physicals in St. Peters with a certified medical examiner on the FMCSA National Registry. See our main DOT physical exams page for details, or learn what a DOT physical costs.
We are at 331 Jungermann Road in St. Peters, serving drivers from O’Fallon, St. Charles, Dardenne Prairie, Wentzville, and across the St. Louis metro. Call (636) 928-5588 or request an appointment online.
Frequently asked questions
What will disqualify you from a DOT physical?
Relatively few conditions are automatic disqualifiers, and many that sound serious are manageable with documentation or a shorter certification. Uncontrolled conditions that pose a clear safety risk are the concern. The examiner evaluates your overall picture against FMCSA standards rather than looking for reasons to fail you.
Can I wear my glasses during the DOT vision test?
Yes. Corrective lenses are completely allowed – just bring your glasses or contacts and wear them. Your certificate may note that corrective lenses are required, which simply means you must wear them while driving.
Does the DOT physical test for drugs?
No. The urinalysis at a DOT physical screens for underlying medical conditions, not drugs. DOT drug and alcohol testing is a separate process arranged through your employer, not part of the medical exam itself.
What blood pressure do you need to pass a DOT physical?
Lower, well-controlled blood pressure supports a full-length certification, while higher readings may lead to a shorter-term card so it can be rechecked. Taking your medication as prescribed and staying calm at the exam both help. High blood pressure rarely disqualifies a driver outright when it is being managed.
How long is the DOT physical good for?
Up to 24 months, and potentially less if a condition needs monitoring. Your Medical Examiner’s Certificate lists the expiration date, so keep track of it and schedule your next exam before it lapses.
Should I fast before a DOT physical?
Fasting is not required for a standard DOT physical. Eat normally, take your regular medications, and stay hydrated for the urinalysis. Simply going easy on salt and caffeine beforehand can help keep your blood pressure reading accurate.
Reviewed by Dr. Jenny Crosby Wiemann, DC, President, Crosby Chiropractic & Acupuncture Centre. Read Dr. Crosby’s full bio.
Last reviewed: August 2026
This page is for general education and is not a substitute for professional medical or regulatory advice. FMCSA standards can change; your certified medical examiner will apply the current requirements to your individual situation.
