What Disqualifies You From a DOT Physical

The short list of conditions that end a DOT physical, the much longer list that only looks disqualifying, and how the FMCSA exemption programs actually work.

Very few things are permanently disqualifying. Most of what drivers panic about is a documentation problem, not a medical one. Here is the honest split.

The genuinely disqualifying list

These are the conditions where 49 CFR 391.41 says no, and the only path forward is a federal exemption program.

Epilepsy or a seizure disorder. A driver with epilepsy, or who takes anti-seizure medication to prevent seizures, cannot be certified. FMCSA runs a seizure exemption program for drivers who have been seizure free and off medication for a defined period, but the default answer is no.

Insulin treated diabetes without the right form. This one changed for the better. Since 2018 there is no exemption application. Your treating clinician fills out form MCSA-5870, covering the last 90 days of glucose monitoring and confirming no severe hypoglycemic episodes. The examiner uses it to certify you for up to one year. Show up without the form and you cannot be certified that day.

Current alcohol dependence, or use of a Schedule I substance. Marijuana is Schedule I under federal law. A state medical card does not change that, and neither does living in a legal state. THC on a DOT drug screen ends the conversation.

Methadone use. Disqualifying for interstate commercial driving.

Loss of a limb or a limb impairment that interferes with safe control. This has an exemption path: the Skill Performance Evaluation certificate, which involves a road test with a state examiner. Plenty of drivers hold one.

Vision or hearing below the standard, unless you qualify under the alternative vision standard or pass audiometry with a hearing aid.

Uncontrolled stage 3 hypertension, meaning 180/110 or higher, until it comes down.

What looks disqualifying and is not

A heart attack, stent or bypass. You need a clearance letter from your cardiologist stating you tolerate the medication and can perform the work, plus usually a recent stress test. With that letter you get certified, typically for one year. Without it you get nothing that day.

A pacemaker. Certifiable with cardiology clearance and regular device checks. An implanted defibrillator is disqualifying.

Sleep apnea. There is no FMCSA regulation that says apnea disqualifies you. What examiners do is refer for testing when the risk factors line up: high BMI, large neck circumference, loud snoring, daytime sleepiness, high blood pressure. If you are already diagnosed and on CPAP, bring the compliance download. The usual bar is use of at least four hours a night on 70 percent of nights. Compliant drivers get certified.

Type 2 diabetes on pills. Not disqualifying. Bring a recent A1C. High numbers may earn you a shorter card rather than a denial.

Anxiety or depression. Not disqualifying by itself. The examiner looks at whether the condition or the medication interferes with safe driving. A letter from your prescriber saying you are stable on the medication resolves most cases.

Amputation you have driven with for years. Same answer: Skill Performance Evaluation certificate.

A DUI on your record. That is a licensing issue, not a medical one. It does not appear on the medical exam, though current alcohol dependence does.

How a "fail" usually plays out

An examiner rarely says you are disqualified and sends you home for good. What actually happens:

  1. Certificate held pending documentation. You need a letter, a test result or a compliance report. Get it, come back, get certified. Most examiners will not charge for the second visit, but ask.
  2. Short term certificate. 3 months or 12 months instead of 24, with a recheck. Common for blood pressure, blood sugar and cardiac conditions.
  3. Determined not qualified. Rare, and usually reversible once the underlying number changes.

Second opinions

Nothing stops you from getting examined by a different certified examiner. Since June 2025 all exam results are reported to FMCSA electronically, so a second examiner can see that you were examined, and shopping for a soft yes is a bad idea. What is legitimate is going back to a different examiner once you have the documentation the first one asked for, or once your blood pressure is genuinely under control.

The one thing that actually ends careers

Falsifying the health history form. It is a federal document. If you omit a seizure history or a cardiac event and it later contributes to a crash, that form is the first thing an attorney pulls. Disclose it, bring the letter, get certified properly.

Find a certified examiner near you, and read the full requirements before you go.