DOT Physical Requirements: Exam, Thresholds, and Certification

DOT physical requirements are set by the Federal Motor Carrier Safety Administration and cover vision, hearing, blood pressure, a urinalysis, and a general physical assessment, plus condition-specific rules for things like diabetes, sleep apnea, and cardiac history. To pass, you have to be examined by a medical professional listed on the FMCSA’s National Registry of Certified Medical Examiners, and your results now flow electronically to your state licensing agency rather than being handed over on a paper card.¹

Who Has to Take a DOT Physical

You need a DOT physical if you drive a commercial motor vehicle in interstate commerce. FMCSA defines a commercial motor vehicle as one that meets any of the following:

A gross vehicle weight rating or gross combination weight rating of 10,001 pounds or more
Designed to transport 9 or more passengers (including the driver) for compensation
Designed to transport 16 or more passengers (including the driver) regardless of compensation
Any vehicle carrying hazardous materials that require federal placarding

The weight threshold catches more drivers than people expect. A pickup rated at 7,000 pounds towing a trailer rated at 4,000 pounds clears the 10,001-pound line, which puts the driver under FMCSA rules.²

The examiner conducting your physical can be a doctor of medicine, doctor of osteopathy, physician assistant, advanced practice nurse, or doctor of chiropractic, as long as they have completed FMCSA’s training and certification.³

What the Examiner Checks

The exam starts with a written medical history, then moves through a set of specific physical assessments.

Vision

You need distant visual acuity of at least 20/40 in each eye separately and 20/40 with both eyes together, with or without corrective lenses. Your horizontal field of vision must be at least 70 degrees in each eye. You also have to recognize standard red, green, and amber traffic signal colors.⁴

Hearing

You have two ways to pass. Either you can hear a forced whisper at 5 feet or more in your better ear, or an audiometric test shows your average hearing loss in your better ear doesn’t exceed 40 decibels at 500, 1,000, and 2,000 Hz. Hearing aids are allowed for both.⁴

Urinalysis

The examiner takes a dipstick urinalysis testing for specific gravity, protein, blood, and glucose. It screens for conditions like diabetes and kidney problems.⁵ It is not a drug test. DOT drug testing runs under 49 CFR Part 40 and is a separate process usually handled by your employer.

General Physical Assessment

The examiner evaluates your cardiovascular, respiratory, neurological, and musculoskeletal systems. You can’t have limb loss or impairment that interferes with gripping a steering wheel or operating vehicle controls unless you hold a skill performance evaluation certificate. Respiratory dysfunction, rheumatic or vascular disease, and psychiatric disorders are all assessed based on whether they would interfere with safe driving.⁴

Blood Pressure Thresholds

High blood pressure is one of the most common reasons drivers walk out with a shortened certification. FMCSA ties your reading directly to how long your card lasts:

Below 140/90: full two-year certification
Stage 1 (140–159/90–99): one-year certification
Stage 2 (160–179/100–109): one-time three-month certification. If your reading drops below 140/90 within those three months, you can then get a one-year certification.
Stage 3 (180/110 or above): disqualified. Once your reading drops below 140/90, you can be certified at six-month intervals.

A driver already diagnosed with hypertension and on treatment should expect at least annual certification regardless of the reading on exam day.⁶ If your pressure runs high, showing up dehydrated, stressed, or having skipped your medication is a reliable way to get a shorter card or a temporary disqualification.

Conditions That Complicate Certification

Insulin-Treated Diabetes

Drivers using insulin used to need a federal exemption. That program ended in November 2018. Now your treating clinician completes the Insulin-Treated Diabetes Mellitus Assessment Form (MCSA-5870), and your medical examiner uses that form to make the certification decision.⁷ The physical must happen within 45 days of the treating clinician signing the form, and certification is limited to one year. A history of severe hypoglycemic episodes or complications that could impair driving means you won’t be certified.

Sleep Apnea

Sleep apnea alone doesn’t disqualify you, but if the examiner suspects it is causing excessive daytime drowsiness, they can require testing and treatment before certifying you. If you use a CPAP machine, your treating clinician has to document that you have been compliant for at least 30 days before the exam. Compliance means using the device an average of four or more hours per night on at least 70 percent of nights.⁸ Bring a compliance report printout to your appointment.

Seizure Disorders

Federal regulations disqualify any driver with a history or diagnosis of epilepsy, or any condition likely to cause loss of consciousness.⁴ The advisory criteria examiners work from set a high bar:

Single unprovoked seizure: you may qualify after being seizure-free and off anti-seizure medication for at least five years
History of epilepsy: you may qualify after being seizure-free and off anti-seizure medication for at least ten years
Non-epileptic loss of consciousness: a six-month waiting period from the episode, and anti-seizure medication must not be required

Taking anti-seizure medication generally prevents certification without a federal exemption from FMCSA.⁹

Cardiac Events

A heart attack, bypass surgery, or other major cardiac event doesn’t permanently end a commercial driving career, but you’ll need medical clearance and often a mandatory waiting period. After a heart attack, cardiologists generally recommend an exercise tolerance test four to six weeks out, and examiners will want you asymptomatic with treatment stable and effective.¹⁰ After coronary artery bypass surgery, the waiting period is at least three months, and certification requires cardiologist clearance, an echocardiogram showing an ejection fraction above 40 percent, and no angina symptoms.¹¹

Medications That Will Get You Flagged

Federal law prohibits commercial drivers from being on duty while possessing or under the influence of any Schedule I controlled substance, any amphetamine, or any narcotic drug or derivative.¹²

The marijuana rule catches drivers off guard. Marijuana is a Schedule I substance under federal law regardless of state legalization, and a medical marijuana card provides no protection under FMCSA rules.

Prescription medication is treated differently. If a licensed medical practitioner has prescribed the medication and advised you it won’t impair your driving, you can use narcotics or other controlled substances that would otherwise be prohibited. That exception does not apply to Schedule I substances.¹² Medications that commonly raise questions include methadone, certain opioid pain medications, benzodiazepines, and sedating antihistamines. The examiner will decide whether any medication you’re taking could impair your ability to drive safely.

The Alternative Vision Standard

If you can’t meet the vision standard in your worse eye, you may still qualify under the alternative vision standard at 49 CFR 391.44, which took effect March 22, 2022 and replaced the old federal vision exemption program.¹³ Your better eye must have at least 20/40 acuity and at least 70 degrees of horizontal field of vision. You get a Vision Evaluation Report (Form MCSA-5871) from an ophthalmologist or optometrist, and the medical examiner uses that report during the physical.¹⁴

Two catches. Certification under this standard is limited to one year, and the physical must happen within 45 days of the eye doctor signing the report. All certificates issued under the old vision exemption program became void as of March 22, 2023.

What to Bring and What It Costs

At minimum, bring a photo ID and your driver’s license, a written list of every current medication with dosages, and any eyeglasses, contacts, or hearing aids you use. If you have a chronic condition under treatment, bring documentation from your provider confirming it’s well-managed.

Some conditions require specific paperwork:

Insulin-treated diabetes: the MCSA-5870 form completed by your treating clinician⁷
Alternative vision standard: Form MCSA-5871 from an ophthalmologist or optometrist¹⁴
CPAP users: a 30-day compliance printout
Cardiovascular conditions: recent lab work and a clearance letter from your treating specialist

Most DOT physicals cost between $50 and $200, depending on the provider and location. Insurance rarely covers employment-related medical certifications, so plan to pay out of pocket.

How Long Your Certification Lasts

The maximum certification period is 24 months. If you’re in good health with no conditions requiring monitoring, that’s what you’ll get.¹⁵ Several conditions automatically shorten it:

Insulin-treated diabetes: annual
Alternative vision standard: annual
Stage 1 hypertension: one year
Stage 2 hypertension: three months, one-time

You are also required to report any new medical condition or change in an existing condition that could affect safe driving, even while your certification is still valid. An injury or illness that impairs your ability to perform normal duties means you have to be reexamined before returning to driving.¹⁵

Since June 23, 2025, medical examiners no longer hand CDL and CLP holders a paper Medical Examiner’s Certificate. Your exam results go from the National Registry directly to your state licensing agency, and your medical status appears on your CDLIS motor vehicle record. Your carrier verifies your status by checking that record, not by looking at a card.¹ The practical takeaway is that there’s less room for error than there used to be. If the examiner finds you medically unqualified or your certification expires, that information reaches your state quickly, and the state must then downgrade your CDL or CLP.¹⁶ Schedule your renewal exam well before your certification expires, not the week of.

1
Federal Motor Carrier Safety Administration. National Registry II Requirements
2
Federal Motor Carrier Safety Administration. What Is the Difference Between a Commercial Motor Vehicle (CMV) and a Non-CMV?
3
Federal Motor Carrier Safety Administration. DOT Medical Exam and Commercial Motor Vehicle Certification
4
eCFR. 49 CFR 391.41 – Physical Qualifications for Drivers
5
Federal Motor Carrier Safety Administration. FMCSA Medical Examiner Handbook
6
Federal Motor Carrier Safety Administration. Section 391.41(b)(6) – Driver Safety and Health-Medical Requirements
7
eCFR. 49 CFR 391.46 – Physical Qualification Standards for an Individual With Diabetes Mellitus Treated With Insulin for Control
8
Federal Motor Carrier Safety Administration. Medical Examiners Handbook 2024 Edition
9
Federal Register. Qualification of Drivers; Exemption Applications; Epilepsy and Seizure Disorders
10
Federal Motor Carrier Safety Administration. Medical Examiners Handbook 2024 Edition
11
Federal Motor Carrier Safety Administration. How Soon May a Driver Be Certified After Coronary Artery Bypass Grafting (CABG) Surgery
12
eCFR. 49 CFR 392.4 – Drugs and Other Substances
13
Federal Motor Carrier Safety Administration. General Vision Exemption Package
14
eCFR. 49 CFR 391.44 – Physical Qualification Standards for an Individual Who Does Not Satisfy the Vision Standard
15
eCFR. 49 CFR 391.45 – Persons Who Must Be Medically Examined and Certified
16
Federal Motor Carrier Safety Administration. Medical