CDL Physical Requirements Explained for 2026

CDL physical requirements are the medical standards you have to meet before you can hold a commercial driver's license, and they come from the Federal Motor Carrier Safety Administration (FMCSA). You need a valid medical certificate before you can even schedule your CDL skills test in most states, so the physical isn't just a formality, it's a prerequisite for getting licensed at all. These standards apply to every CDL holder driving interstate, no matter what state issued the license, and they cover vision, hearing, blood pressure, and several other health markers. If you're prepping for your first exam or renewing your medical card, here's what actually gets checked, including the 20/40 vision line and the 140/90 blood pressure threshold, and what can knock you out of qualifying. If you're still working through licensing steps, our CDL license cost guide walks through the full process and what to budget for beyond just the exam fee.

The exam itself is called the DOT physical, and it has to be done by a medical examiner listed on the FMCSA National Registry. We cover the full exam process, what to bring, and how long it takes in our DOT physical exam breakdown, but this post focuses specifically on the medical standards you need to hit.

What are the vision requirements for a CDL physical?

You need at least 20/40 vision in each eye (with or without corrective lenses) and 20/40 in both eyes together, plus at least 70 degrees of peripheral vision in each eye. You also need to be able to distinguish standard traffic signal colors: red, green, and amber.

If you're colorblind, that doesn't automatically disqualify you. Drivers who fail the standard Ishihara color plate test can still qualify by passing a secondary color vision test, typically identifying red, green, and amber traffic signal colors, administered by the certified medical examiner during the DOT physical, not by a state agency, according to FMCSA's Federal Register rule on the vision standard. If your vision doesn't meet the standard even with glasses or contacts, you won't pass, full stop. There's no waiver for uncorrected vision below that line.

What hearing standard does FMCSA require?

You must be able to hear a forced whisper from at least 5 feet away, in at least one ear, with or without a hearing aid. Alternatively, examiners can use an audiometric test, and you need to not have an average hearing loss in your better ear of more than 40 decibels at 500Hz, 1000Hz, and 2000Hz.

Hearing aids are allowed. If you use one to pass, you're required to wear it every time you drive, and that gets noted on your medical certificate. The same goes for corrective lenses if you needed them to pass the vision test. Whatever helped you meet the standard during the exam has to be on you when you're behind the wheel.

Do these requirements differ by state?

The medical standards themselves are federal and apply the same way whether you're licensed in Texas, Ohio, or anywhere else you're running interstate loads. What can differ by state is how intrastate-only drivers are handled, since some states set their own, sometimes slightly looser, medical rules for drivers who never cross state lines. If you're building out routes or authority in a specific state, our state-by-state trucking insurance guides cover some of those regional differences alongside coverage requirements.

What blood pressure and heart health standards apply?

Your blood pressure generally needs to be below 140/90 to get a full two-year medical card without follow-up. Here's how the tiers typically break down, based on FMCSA's medical examiner guidelines:

These are general guidelines examiners use, and a medical examiner has discretion based on your full history. If you're on blood pressure medication and stable, that alone doesn't disqualify you, but expect to bring a list of medications and possibly a note from your treating physician.

Does diabetes disqualify you from a CDL?

No, insulin-dependent diabetes does not automatically disqualify you, but you'll need additional documentation. If you use insulin to manage diabetes, FMCSA no longer requires evaluation by a board certified endocrinologist or quarterly specialist visits. Instead, a treating clinician (any healthcare professional who manages and prescribes your insulin, not necessarily an endocrinologist) completes Form MCSA-5870 confirming a stable insulin regimen and properly controlled diabetes, along with hemoglobin A1C results and three months of glucose self-monitoring records. The certified medical examiner must receive this form and complete the exam within 45 days, and can then issue a Medical Examiner's Certificate valid for up to 12 months under 49 CFR 391.45(e), per FMCSA's Form MCSA-5870 guidance.

Drivers with diabetes controlled by diet or oral medication alone usually go through the standard exam without extra steps, as long as blood sugar levels are documented as stable.

What other conditions get checked during the physical?

The exam also screens for sleep apnea risk, heart conditions, epilepsy or seizure history, and any condition that could cause sudden incapacitation behind the wheel. Examiners look at your neck size, BMI, and reported sleep quality as sleep apnea red flags, and may require a sleep study before certifying you if risk factors are present.

You'll also go through a urinalysis (mainly checking for protein, blood, or sugar in urine, not a drug test), a review of your medication list, and a basic musculoskeletal check to confirm you have the range of motion and strength to operate a commercial vehicle safely.

What medications and health history do you need to disclose?

Bring a complete list of prescription and over-the-counter medications, including dosages, to your appointment. Examiners are checking for anything that could affect alertness or reaction time, like sedatives, certain seizure medications, or strong pain medication. Being upfront about your history matters more than people expect. Undisclosed conditions that surface later, whether during a routine renewal or after an incident, can complicate your certification and, separately, can complicate an insurance claim if a carrier later finds gaps in your medical paperwork.

If you've had a recent surgery, a new diagnosis, or a hospitalization since your last exam, mention it even if you think it's unrelated to driving. Examiners would rather ask a follow-up question than have you leave something out that turns into a bigger issue at your next renewal.

How often do you need a new DOT physical?

Most drivers renew every 2 years, but that gets shortened if you have a condition an examiner wants to monitor more closely, like borderline blood pressure or new insulin use. Some drivers with more significant health flags get certified for just 3 months or 1 year at a time until their condition stabilizes.

Missing your renewal window means your medical certificate lapses, which means your CDL becomes invalid for commercial driving until you get recertified.

What happens if you fail the DOT physical?

Failing isn't always permanent. If you're disqualified for something correctable, like uncontrolled blood pressure or an untreated sleep apnea diagnosis, you can usually get treatment, bring documentation back, and get re-examined. Some examiners will issue a temporary certificate for as little as a week or a month to give you time to address a specific issue, like getting a new pair of glasses or starting blood pressure medication.

If you're denied certification outright, you have the right to request a review through FMCSA's medical review process, though that path is typically reserved for disputes over how a standard was applied rather than a simple recheck. For most drivers, the faster route is working with your examiner on what specifically needs to change before your next visit.