The DOT physical and your CDL

This page is about how the two fit together. It publishes no medical standards. Those are in 49 CFR 391.41 and a certified medical examiner applies them.

Two systems, one join

Licensing sits in 49 CFR Part 383. That is your class, your endorsements, your restrictions and your knowledge and skills tests, and your state licensing agency runs it.

Medical qualification sits in 49 CFR Part 391 Subpart E. That is the physical, the standards in 49 CFR 391.41 and the medical examiner's certificate under 49 CFR 391.43, and a certified medical examiner runs it.

They meet in your driving record. For CDL and CLP holders the state records your medical certification status against the record, so the license and the medical status are checked as one thing. Let the medical side lapse and the license side reacts automatically.

Self-certification: telling the state which driver you are

When you apply for a CDL or a commercial learner's permit, 49 CFR 383.71 makes you certify which type of commercial driving you do. There are four categories:

• Non-excepted interstate. You drive across state lines and the federal medical requirements apply to you. This is most drivers.
• Excepted interstate. You drive across state lines but the kind of driving you do is excepted from the federal medical certificate requirement.
• Non-excepted intrastate. You drive only inside your own state and your state's medical requirements apply.
• Excepted intrastate. You drive only inside your own state and are excepted from your state's medical requirement.

Get this right, because it decides whether the state ever asks you for a medical certificate. If you self-certify as non-excepted interstate, the state expects current medical certification on your record and will act when it is missing. If your work changes, tell the state. The category on your record is the one they act on, not the one you meant.

Excepted does not mean "does not need a physical" in every case. It means the federal medical certificate requirement does not attach to that driving. Your employer, your insurer or your state can still ask for one.

What the state does with your certificate

49 CFR 383.73 requires the state to record your medical certification status on your driver record, and to act when it is not current. Certified medical examiners report exam results to FMCSA, and for CDL and CLP holders that certification information reaches the state licensing agency, so the state finds out about your exam without you posting anything.

Do not assume that means you can ignore it. Check your own record after an exam and confirm the state has you as certified with the right expiry date. It is a five-minute check that prevents the expensive version of this problem.

What a downgrade is

If your medical certification is not current and you have self-certified as needing it, the state downgrades your CDL. The license does not vanish. The commercial privilege comes off it, and you are left with a non-commercial license until the medical side is fixed.

That is the mechanism worth understanding. Nobody suspends you for being unwell. The downgrade is an administrative consequence of a missing current certificate on your record, and it happens on schedule whether or not you noticed the date.

Undoing it means getting examined again by a certified medical examiner and getting current certification back onto your record, then dealing with whatever your state requires to restore the commercial privilege. That takes time you did not plan for, and you cannot drive commercially while it is happening.

How to not let it happen

• Write the expiry date from the certificate somewhere you will actually see it, and set a reminder about two months before.
• Book the new exam before the old certificate expires, not after.
• If you were certified for a shorter period than two years, treat the earlier date as the real one. It is.
• Check your driving record shows the new certification after each exam.
• Keep a copy of every certificate. Your employer keeps one in your driver qualification file under 49 CFR 391.51, but a file at a company you left is not much use to you.

Medical variances show up on your license

Federal rules have a restriction code for this. 49 CFR 383.153 lists the restrictions a state can put on a CDL, and V is the code for a medical variance on the driver record. That is worth knowing because a restriction on the license is a licensing matter, while whatever sits behind it is a medical one handled through FMCSA and your examiner. If you hold an FMCSA exemption or a skill performance evaluation certificate under 49 CFR 391.49, carry it and keep it current alongside the medical certificate.

Permit holders need this too

A commercial learner's permit is a commercial driving privilege, so the medical side applies to it as well. You self-certify when you apply for the permit, and the same record-keeping and downgrade machinery applies while you hold it. The commercial learner's permit covers what that step involves, including the wait before you can sit your skills test.

The written tests and the physical are separate

They really are unrelated. The physical decides whether you are medically qualified to drive. The knowledge tests decide whether you know enough to be licensed for a class of vehicle and the endorsements on it. Failing one has no bearing on the other, and passing one proves nothing about the other.

Practically, that means the two things run on different clocks and you can work on both at once. Book the physical early, because the appointment and any paperwork it turns up take longer than people expect, then spend the wait on the exams.

Every commercial driver sits the general knowledge exam, so the general knowledge practice test is the place to start. After that it depends on the class you are going for. Class A candidates want the Class A practice test and Class B candidates the Class B practice test. If you are not sure which one applies to the work you want, CDL classes explained sorts that out, and the CDL practice test hub lists every exam we cover.

Where to ask the medical questions

Not here. If you want to know how the standards in 49 CFR 391.41 apply to you, a condition you have or a medication you take, ask a certified medical examiner from the FMCSA National Registry, and read FMCSA's own material. They set the standards and they decide. Anything else is a guess with your license on it.