A DOT medical card lasts up to 24 months, and that two-year window is the longest certification allowed under federal rules.1Federal Motor Carrier Safety Administration. DOT Medical Exam and Commercial Motor Vehicle Certification Many drivers get less. If you have high blood pressure, insulin-treated diabetes, sleep apnea, or another condition the medical examiner wants to keep watch on, your card may run for one year, or in some cases just three months. The examiner performing your physical decides the length based on your health at the time of the exam.
What Sets the Length
Two things determine how long your card is good for: the FMCSA’s physical standards and the examiner’s judgment about any condition you have. If you meet every standard with nothing to monitor, you get the full 24 months. If something needs tracking, the examiner shortens the window so they can see you again sooner.
The clock starts on the date the examiner signs your Medical Examiner’s Certificate (Form MCSA-5876), not the date you submit it to your state. Your exam has to be done by a medical examiner listed on the FMCSA’s National Registry of Certified Medical Examiners.2Federal Motor Carrier Safety Administration. National Registry of Certified Medical Examiners
To qualify for the full two years, you need to meet each of the physical standards. Vision means at least 20/40 acuity in each eye (with or without correction), a minimum 70-degree field of vision in each eye, and the ability to distinguish red, green, and amber. Hearing means perceiving a forced whisper at five feet or passing an audiometric test. If you need glasses or contacts to hit those marks, the examiner notes that as a restriction on your card. Failing vision or hearing outright isn’t a shorter card — it’s no card unless you qualify for an exemption.
Conditions That Shorten the Certification
Three conditions account for most of the shorter cards issued.
High Blood Pressure
The FMCSA uses staged tiers based on the reading at your exam:3Federal Motor Carrier Safety Administration. What Is the Effect on Driver Certification Based on FMCSA Hypertension Stages
- Stage 1 (140–159 systolic or 90–99 diastolic): one-year certification.
- Stage 2 (160–179 systolic or 100–109 diastolic): a one-time three-month card. Bring your pressure below 140/90 within those three months and you can move up to a one-year card.
- Stage 3 (180+ systolic or 110+ diastolic): disqualified. You cannot be certified until your reading comes down.
A driver who reads consistently below 140/90 at renewal can go back to the full two years.
Insulin-Treated Diabetes
Drivers who use insulin can receive a maximum 12-month certification under the FMCSA’s insulin-treated diabetes mellitus standard. At each annual renewal, you need documentation from your treating clinician confirming stable blood sugar management. Advanced diabetic retinopathy is permanently disqualifying regardless of how well the diabetes is otherwise controlled. Other complications get evaluated individually based on whether they impair safe operation.
Sleep Apnea
The FMCSA’s expert panel has recommended annual recertification for drivers with obstructive sleep apnea, tied to consistent CPAP therapy compliance.4Federal Motor Carrier Safety Administration. Expert Panel Recommendations – Obstructive Sleep Apnea and Commercial Motor Vehicle Driver Safety In practice, that means bringing your CPAP usage data to the exam: at least four hours per night on 70% of nights. Demonstrate compliance at three months and you can receive a one-year card. Your examiner will want to see the full data set at your next renewal.
When You Can’t Be Certified At All
Some situations don’t shorten your card, they prevent one. Stage 3 hypertension is one, as noted above. Certain medications are another. Schedule I controlled substances are automatically disqualifying, as are narcotics, amphetamines, and other habit-forming drugs used without or beyond a valid prescription. Anti-seizure medications taken for seizure prevention are disqualifying regardless of the underlying condition.5Federal Motor Carrier Safety Administration. What Medications Disqualify a CMV Driver
There is a narrow exception for some prescription controlled substances. If your prescribing doctor provides a written statement that you can safely operate a commercial vehicle while taking the medication, the medical examiner has discretion (not an obligation) to certify you. Bring that letter to the exam. Without it, an examiner will almost certainly decline to certify if the medication shows up.
Renewing Before It Expires
Schedule your renewal exam roughly 30 to 45 days before your current card expires. Your new certification period starts on the date of the new exam, so going a few weeks early doesn’t cost you any meaningful time, and it leaves a buffer if something goes wrong.
Come prepared. Bring your current medical card, a valid driver’s license, a complete list of medications and dosages, and any condition-specific records the examiner will need: recent A1C results and clinician documentation for diabetes, CPAP compliance data for sleep apnea, a clearance letter for heart conditions or other specialist-managed issues. Showing up without these records is one of the most common reasons drivers walk out uncertified, because the examiner can’t certify what they can’t verify.
After the exam, the examiner issues your new certificate. You then submit a copy to your state’s driver licensing agency to update your CDL record.6Federal Motor Carrier Safety Administration. State-by-State Instructions for Submitting Medical Certificates for CDL Drivers to the State Agencies Each state handles this differently. Some accept fax, email, or mail; others want an in-person visit to a licensing office. Processing typically takes up to 10 business days.
What Happens If Your Card Expires
Driving on an expired medical card is treated as driving while medically unqualified. At a roadside inspection, an expired card triggers an out-of-service order, and the truck stays where it is until the situation is fixed. The FMCSA can also impose civil penalties on both the driver and the motor carrier.
An expired certificate also sets off a CDL downgrade. States are required to remove commercial driving privileges from drivers who don’t keep a current certificate on file, and some begin the downgrade process within 60 days of expiration. Once downgraded, you lose CDL privileges entirely until you complete a new physical, obtain a current card, and submit it to have your commercial status restored. The exam itself costs roughly $75 to $150, the same as any renewal, but the administrative delay and lost driving time make on-schedule renewal far cheaper in practice.
The 2026 NRII Waiver
The FMCSA is rolling out the National Registry II (NRII) system, which electronically transmits certification results from the examiner to state licensing agencies. As of late 2025, 42 states and the District of Columbia had implemented NRII; eight states were still using the paper process.7Federal Motor Carrier Safety Administration. Waiver for Commercial Drivers License Holders, Commercial Learner’s Permit Holders, and Motor Carriers During Initial National Registry II Implementation
During the transition, some drivers have seen delays between the exam date and the electronic update reaching their state record. To bridge the gap, the FMCSA issued a waiver effective through April 10, 2026 that lets drivers and motor carriers use the paper Medical Examiner’s Certificate as proof of medical qualification for up to 60 days after issuance. Keep the paper certificate with you when driving during this period. The waiver does not change any physical qualification requirements or the certification length. It only extends the window for the paperwork to catch up to the technology.