Who this is for: CDL drivers, fleet managers, owner-operators
DOT Medical Card Explained — What CDL Drivers Need to Know
The DOT medical card (Medical Examiner's Certificate, Form MCSA-5876) certifies that a CDL driver meets federal medical standards for operating a commercial motor vehicle. Interstate CDL drivers must maintain a valid medical certificate at all times.
Important Notice
This page provides an educational overview. Medical qualification determinations are made by a certified medical examiner based on your individual health status. This is not medical advice.
What the medical certificate is
The Medical Examiner's Certificate (MCSA-5876) is a document issued by a certified medical examiner after a DOT physical examination. It certifies that the driver meets federal physical qualification standards under 49 CFR Part 391, Subpart E. The certificate includes the driver's name, the examiner's NPI number, the expiration date, and any applicable restrictions.
Who must have a DOT medical card
Interstate CDL drivers operating CMVs that require a CDL under 49 CFR Part 383 must maintain a valid medical certificate. The requirement applies to Class A, B, and C CDL holders in interstate commerce. Certain intrastate-only drivers may be subject to different state medical standards — verify with your state CDL agency.
How the medical certificate connects to your CDL
When you pass a DOT physical, the medical examiner submits the results to the FMCSA National Registry and the driver's state licensing agency electronically. The state updates the Commercial Driver's License Information System (CDLIS) to reflect the medical certification. An expired or missing medical certification can result in a CDL downgrade to non-CDL status.
Expiration and validity periods
A standard DOT medical card is valid for up to 24 months. However, some conditions result in shorter certification periods. For example, drivers with well-controlled hypertension may receive a 12-month card; drivers on insulin for diabetes who qualify under an exemption may receive varying certification periods. The examiner determines the expiration date based on the driver's health status.
What the DOT physical actually examines
The physical qualification standards are set out in 49 CFR 391.41–391.49. The exam covers vision (corrected or uncorrected, the driver must see at least 20/40 in each eye and have a horizontal field of at least 70 degrees), hearing (must detect a forced whispered voice at 5 feet without a hearing aid, or pass an audiometric test — hearing aids are permitted if they meet the standard), blood pressure (stage 2 hypertension of 160–179/100–109 results in a 12-month card instead of 24 months), and a review of cardiovascular, neurological, musculoskeletal, and respiratory health. Drivers with certain conditions — a history of seizures, a recent cardiac event, or certain psychiatric conditions — face additional scrutiny or must obtain a federal waiver or exemption before certification.
Only National Registry examiners can issue valid cards
Since May 21, 2014, DOT physicals must be conducted by a medical examiner listed on the FMCSA National Registry of Certified Medical Examiners. These examiners complete FMCSA-approved training and pass a certification test. A physical conducted by a physician who is not on the National Registry — even a fully licensed MD or DO — does not produce a valid DOT medical certificate. Drivers can search for currently registered examiners at nationalregistry.fmcsa.dot.gov.
The self-certification requirement
Separate from the physical exam, CDL holders must file a self-certification with their state licensing agency indicating their type of commercial operation. Interstate drivers operating CMVs requiring a CDL must certify as "non-excepted interstate," which requires a current DOT medical certificate on file with the state. If you change operating categories — for example, switching from intrastate to interstate work — you must update your self-certification, which then changes what medical documentation the state requires from you.
Expired card at a roadside inspection
At a scale or inspection station, the officer will check whether your medical certificate is current. An expired card — even by a day — can result in an out-of-service order, meaning the driver cannot continue operating until a valid certificate is produced. This situation also generates a CSA violation for the carrier. For owner-operators, an expiration discovered at a scale house can mean hours of delay. Tracking expiration dates proactively is a basic operational necessity, not just a compliance checkbox.
Frequently Asked Questions
Do I need to carry my medical card with me?
Federal regulations require interstate CDL drivers to have their medical certificate in their possession when operating a CMV. The specific format depends on your state — some states embed the certification into the CDL record and issue a paper card, others require the physical MCSA-5876 form. Confirm with your state CDL agency what document you must carry.
What happens if my medical card expires?
Your CDL may be downgraded to a non-commercial license by the state, and you cannot legally operate a CMV until a new certificate is issued and the state updates your record. This can affect your employment status immediately. Do not wait until the expiration date — schedule the physical at least a few weeks out to allow processing time.
Can conditions like sleep apnea affect my CDL?
Yes. Untreated obstructive sleep apnea is generally disqualifying. A driver diagnosed with sleep apnea can typically be certified if they are compliant with treatment (usually CPAP) and provide documentation of effective control. The medical examiner makes the determination based on the driver's specific situation.