No card, no truck. Your DOT medical certificate is one of the few pieces of paper that can park your business overnight, so it's worth understanding exactly what it takes to get one and keep it.

Here's the plain-English rundown of DOT medical card requirements, what the exam looks at, and how to make sure yours never lapses.

What the DOT physical actually covers

The exam has to be done by a certified medical examiner listed on the FMCSA National Registry. Any random walk-in clinic won't do — the examiner must be on the registry for the card to count.

The examiner checks the things that affect whether you can safely operate a commercial truck:

  • Vision — at least 20/40 in each eye (corrected is fine) and adequate peripheral vision.
  • Hearing — you must be able to perceive a forced whisper at 5 feet, or pass an audiometric test.
  • Blood pressure — a big one, and the most common reason a card gets shortened (more below).
  • Urinalysis — screens for underlying conditions like diabetes or kidney issues, not a drug test.
  • General physical — heart, lungs, neurological function, limbs, and overall fitness for the job.

Bring a list of your medications, your doctors' contact info, and any paperwork for conditions you already manage. Showing up prepared can be the difference between a two-year card and a short one.

How long your card lasts

A clean bill of health gets you the full 24-month certificate. But the examiner can issue a shorter card if something needs monitoring — and that's more common than most owner-operators expect.

You might walk out with a 3-month, 6-month, or 12-month card if you have a condition the examiner wants to recheck. A shorter card isn't a failure; it just means you're back in the chair sooner. The problem is when you forget and it expires while you're out on a load.

Common conditions that shorten or block a card

These are the issues that most often turn a two-year card into a short one — or a disqualification:

  • High blood pressure — Stage 1 often gets a one-year card; higher readings shorten it further or require it under control before certification.
  • Diabetes — managed diabetes is fine, but insulin use requires additional documentation and often a shorter card.
  • Sleep apnea — if flagged, you'll typically need a CPAP compliance report to stay certified.
  • Heart conditions — history of certain cardiac events may require a clearance letter from your cardiologist.
  • Vision or hearing loss — may require an exemption or additional testing.

The takeaway: if you manage a condition, manage the paperwork too. Most disqualifiers are really documentation problems in disguise. Come with the letters and reports in hand and you keep control of the outcome.

Keeping it current so it never parks you

An expired medical card can pull you off the road and knock your CDL into an out-of-service status until it's fixed. That's lost revenue for something entirely preventable.

  • Put your expiration date on a calendar with a 60-day reminder, not the week before.
  • Schedule short-card renewals early — clinics book up.
  • Keep a photo of your current card on your phone and a copy in the cab.
  • Confirm your card is on file wherever your compliance is handled.

When you lease on and run under ARI's authority, compliance is part of what our team helps keep straight — so a looming expiration date gets caught before it becomes a shutdown. That's one less thing eating into your driving time. You can read more about how the back office is handled in our resource center.

Bottom line: the DOT medical card is simple to keep current once you know what it checks and when yours runs out. Stay ahead of it, keep your documentation ready, and it never costs you a day.

Ready to run under an authority that helps you stay compliant and paid? See what it takes to lease on with ARI.