A medical examiner's certificate (MEC), often called a DOT medical card, is the record showing that a commercial motor vehicle driver has passed a physical examination under 49 CFR 391.41 through 391.49. The exam must be performed by a medical examiner listed on FMCSA's National Registry of Certified Medical Examiners, and a certificate is valid for up to 24 months. Examiners can issue a shorter certificate when a condition, such as high blood pressure or insulin-treated diabetes, needs closer monitoring.
The certificate matters because a driver may not operate a CMV in interstate commerce without being medically qualified. Driving without valid medical certification is a common roadside violation and shows up in the Driver Fitness BASIC of FMCSA's Safety Measurement System. Carriers that dispatch drivers without valid certification face civil penalties.
What Is a Medical Examiner's Certificate?
The physical qualification standards in 49 CFR 391.41 cover vision, hearing, blood pressure, diabetes, heart and lung conditions, epilepsy, mental conditions, drug and alcohol use and other conditions that could affect safe driving. During the exam, the medical examiner reviews the driver's health history, performs the physical exam and decides whether the driver meets the standards.
If the driver qualifies, the examiner decides how long the certification lasts. The maximum is 24 months. Common shorter periods include certification for 1 year or less for drivers being monitored for hypertension, and a maximum of 12 months for drivers with insulin-treated diabetes under 49 CFR 391.46. Some drivers need a vision or skill performance evaluation exemption or certificate to qualify.
Paper Cards vs. Electronic Certification
How medical certification is recorded now depends on whether the driver holds a CDL or commercial learner's permit (CLP).
- CDL and CLP holders: under the Medical Examiner's Certification Integration rule, often called National Registry II, examiners report results to FMCSA electronically, and FMCSA sends them to the driver's state licensing agency, which posts the status to the driver's record. Examiners no longer issue paper certificates to these drivers, and drivers no longer deliver a card to the state.
- Proof for CDL drivers: carriers verify certification through the driver's state motor vehicle record, and roadside officers check the state record. FMCSA's last nationwide exemption allowing a paper or copy MEC as temporary proof ended October 11, 2026. A separate exemption for Alaska, the only state that had not implemented National Registry II, runs through October 12, 2027.
- Non-CDL CMV drivers: drivers of CMVs that do not require a CDL still receive a paper medical examiner's certificate, carry it while driving, and give a copy to the carrier.
Because this transition has involved several waivers, check FMCSA's National Registry for the latest guidance before relying on a paper card.
Self-Certification for CDL Drivers
CDL holders must also self-certify to their state which type of commerce they operate in under 49 CFR 383.71. The four categories are non-excepted interstate, excepted interstate, non-excepted intrastate and excepted intrastate. Most drivers working for regulated carriers are non-excepted interstate and must keep valid medical certification on file with the state. If certification lapses, the state must downgrade the CDL.
What Carriers Must Keep in the DQ File
- Proof of medical certification: for CDL drivers, an MVR showing current medical certification; for non-CDL drivers, a copy of the medical examiner's certificate.
- Examiner verification: for non-CDL drivers, a note confirming that the examiner was listed on the National Registry.
- Waivers or exemptions: copies of any skill performance evaluation certificate or FMCSA exemption the driver needs.
These records belong in the driver qualification file. For the full medical rules, see DOT medical certification.
How to Manage Medical Certification Step by Step
- Find a certified examiner. Use the National Registry to confirm the examiner is listed before the driver schedules an exam.
- Prepare the driver. Remind drivers to bring medication lists, glasses or hearing aids, and records for conditions such as sleep apnea, diabetes or heart disease.
- Complete the exam. The examiner reviews history, performs the exam and records the result.
- Confirm the result is recorded. For CDL drivers, obtain an updated MVR showing the new medical certification. For non-CDL drivers, collect a copy of the new certificate.
- Update the DQ file. File the proof of certification and note the expiration date.
- Set reminders. Schedule renewal reminders well before expiration, especially for drivers with short certification periods.
- Remove expired drivers. Do not dispatch a driver whose medical certification has expired until a new exam is completed and recorded.
Common Mistakes to Avoid
- Tracking only 24-month expirations and missing drivers certified for 1 year or less.
- Relying on a paper card for a CDL driver whose state record does not show current certification.
- Using an examiner who is not listed on the National Registry.
- Failing to collect an updated MVR after a CDL driver's new exam.
- Not acting when a driver reports a new condition or medication that could affect qualification.
How SMS360 Helps
SMS360's Driver Qualification Files module stores medical certification records with each driver's file and sends reminders before expiration dates. DOT Compliance keeps related compliance tasks and records together, and Fleet Reports can show which drivers have certifications due soon.
Frequently Asked Questions
How long is a DOT medical card valid?
Up to 24 months. The medical examiner may issue a shorter certificate, such as 1 year or less for a driver being monitored for a condition. Drivers with insulin-treated diabetes can be certified for no more than 12 months.
Do CDL drivers still need to carry a paper medical card?
In most states, no. Under National Registry II, medical certification for CDL and CLP holders is sent electronically to the state, and proof is the state driving record. The nationwide paper card exemption ended October 11, 2026, and Alaska has a separate exemption through October 12, 2027.
What happens if a driver's medical certification expires?
The driver is no longer medically qualified and may not drive a CMV until a new exam is completed. For CDL holders, the state will also downgrade the license if a new certification is not posted to the driver's record, so drivers should renew well before the expiration date.
Can any doctor perform a DOT physical?
No. The exam must be performed by a medical examiner who is certified and listed on FMCSA's National Registry. Results from an unlisted examiner are not valid.
