DOT Medical Card Requirements for CDL Drivers: Complete 2025 Guide
Every CDL driver who operates a commercial motor vehicle in interstate commerce must hold a valid DOT medical certificate — commonly called a "DOT medical card" or "DOT physical card." The medical certificate documents that the driver meets the physical qualification standards set by FMCSA under 49 CFR § 391.41. Motor carriers must keep a copy of each driver's current medical certificate in their driver qualification file and track renewal dates carefully, because a driver operating with an expired medical certificate is immediately out of compliance.
What Is a DOT Medical Card?
A DOT medical card (officially the Medical Examiner's Certificate, or MEC) is a wallet-sized certificate issued by a certified medical examiner after the driver passes a DOT physical examination. It certifies that the driver meets the FMCSA's physical qualification standards for operating a commercial motor vehicle. The certificate includes:
- Driver's name and date of birth
- Expiration date (determined by the medical examiner based on the driver's health conditions)
- Medical examiner's name, signature, NPI number, and state license number
- Any applicable restrictions (e.g., must wear corrective lenses, limited to intrastate commerce only)
Since 2014, medical examiners are required to transmit medical certificate results directly to FMCSA's National Registry within 24 hours of examination. The state CDL licensing authority then updates the driver's CDL record with the medical certification information. However, motor carriers are still required to maintain a copy in the driver qualification file.
Who Needs a DOT Medical Card?
A DOT medical card is required for drivers who operate in interstate commerce in vehicles that meet any of the following criteria (as defined in 49 CFR § 390.5):
- Gross vehicle weight rating (GVWR) or gross combination weight rating (GCWR) of more than 10,001 pounds
- Vehicle designed or used to transport more than 8 passengers (including the driver) for compensation
- Vehicle designed or used to transport more than 15 passengers (including the driver) not for compensation
- Vehicle used in transporting hazardous materials in quantities requiring placarding
Intrastate-only drivers may be subject to state-level medical standards, which can differ from federal FMCSA standards. Some states have adopted the federal standards; others have their own requirements. Carriers operating exclusively within a single state should verify that state's CDL medical requirements.
Finding an FMCSA-Registered Medical Examiner
A DOT physical must be performed by a medical examiner who is listed on the FMCSA National Registry of Certified Medical Examiners. Only National Registry examiners are authorized to issue a valid DOT medical certificate. A DOT physical performed by a physician who is not on the National Registry is not legally valid, even if the exam itself was thorough.
To find a National Registry examiner, use the search tool at the FMCSA's website: nrcme.fmcsa.dot.gov. Examiners can be searched by location, name, or NPI number. The registry includes physicians, advanced practice nurses, physician assistants, chiropractors, and other licensed healthcare providers who have completed FMCSA's medical examiner training and passed the medical examiner certification test.
What the DOT Physical Covers
The DOT physical examination evaluates the driver against the physical qualification standards in 49 CFR § 391.41(b). The examiner evaluates the following systems:
Vision
Drivers must have distant visual acuity of at least 20/40 in each eye with or without corrective lenses. Field of vision must be at least 70 degrees in the horizontal meridian in each eye. Drivers must be able to recognize colors needed to respond to traffic signals and devices. Drivers who cannot meet the vision standards with corrective lenses may apply for a federal vision exemption.
Hearing
Drivers must perceive a forced whispered voice in the better ear at not less than 5 feet without the use of a hearing aid, or if tested using a standard audiometric device, not have average hearing loss in the better ear greater than 40 dB. Hearing aids are permitted if the driver can meet the standard while wearing the aid.
Blood Pressure
Hypertension classification determines both certification and the validity period of the medical certificate:
- Stage 1 (140–159 / 90–99): One-year certificate. Driver should be treated and bring BP below Stage 1 at next exam.
- Stage 2 (160–179 / 100–109): Three-month temporary certificate to allow time for treatment. Must return to examiner within 3 months with BP below Stage 2 for a one-year certificate.
- Stage 3 (180+ / 110+): Disqualifying. Driver may not be medically certified until BP is reduced to Stage 2 or below under treatment.
Diabetes
Drivers who require insulin to control their diabetes were historically disqualified. The Federal Diabetes Exemption Program now allows insulin-treated diabetic drivers (ITDDs) to apply for an exemption through FMCSA. The exemption is granted for two years and requires documentation of stable, well-controlled diabetes from an endocrinologist or treating physician. Drivers without the exemption who require insulin are disqualified under 49 CFR § 391.41(b)(3).
Cardiovascular Health
The medical examiner evaluates the driver's cardiovascular system for conditions that would impair the safe operation of a CMV. Drivers with a history of cardiovascular disease, recent cardiac surgery, or arrhythmias may require a specialist evaluation or may be disqualified depending on the specific condition and stability.
Neurological Conditions
Epilepsy is a disqualifying condition under 49 CFR § 391.41(b)(8). Drivers with a diagnosis of epilepsy or any other condition likely to cause a loss of consciousness or any loss of control of a motor vehicle may not be medically certified. The Federal Epilepsy/Seizure Disorder Exemption Program allows some drivers to apply for an exemption under specific conditions.
Sleep Apnea
Sleep apnea is not explicitly listed as a disqualifying condition in the regulations, but medical examiners are instructed to evaluate whether the driver has a condition likely to interfere with the safe operation of a vehicle. Severe obstructive sleep apnea (OSA) is treated as disqualifying in practice. Drivers with diagnosed OSA who are compliant with CPAP therapy may be certified with restrictions or may receive a shorter-term certificate requiring follow-up.
Controlled Substances & Alcohol
Current users of Schedule I drugs, or persons dependent on any controlled substance, are disqualified. Medical marijuana is not an exception — regardless of state law, federal FMCSA drug testing rules (49 CFR Part 382) treat marijuana as a disqualifying drug for CDL drivers.
Medical Certificate Validity Periods
| Condition / Situation | Certificate Validity |
|---|---|
| Healthy driver, no concerns | Up to 24 months |
| Stage 1 hypertension (140–159 / 90–99) | 12 months |
| Stage 2 hypertension (160–179 / 100–109) | 3 months (temporary) |
| Insulin-treated diabetes with federal exemption | 12 months (per exemption terms) |
| Sleep apnea on CPAP therapy | 12 months (with compliance documentation) |
| Other conditions requiring monitoring | Per examiner's judgment (down to 3 months) |
The medical examiner determines the validity period — the carrier and driver cannot extend it. If a driver's medical certificate expires before the renewal examination is complete, the driver is not medically qualified to operate a CMV.
Medical Certificate Disqualifying Conditions Summary
The following conditions automatically disqualify a driver under 49 CFR § 391.41(b) (absent an active federal exemption):
- Loss of a limb or impairment that prevents safe vehicle control (federal Skill Performance Evaluation Certificate may provide exemption)
- Established diagnosis of epilepsy or other seizure disorder
- Any condition likely to cause sudden incapacitation (uncontrolled arrhythmia, cardiovascular disease at high risk of sudden event)
- Insulin-treated diabetes mellitus (without Federal Diabetes Exemption)
- Stage 3 hypertension (BP 180+ / 110+)
- Vision below 20/40 in either eye (uncorrectable)
- Current use or clinical diagnosis of alcoholism
- Current use of Schedule I drugs or dependence on any controlled substance
Tracking DOT Medical Certificates in Your DQF
Motor carriers must keep a copy of the driver's current medical certificate in the driver qualification file. Because certificate lengths vary (2-year, 1-year, or 3-month), tracking expiration dates manually across a fleet is error-prone. Missing a medical certificate renewal means every trip the driver makes after the expiration date is a violation — each potentially subject to a $16,000 penalty.
CarrierLens tracks the expiration date for every driver's medical certificate and sends automated alerts at 90, 60, 30, and 7 days before expiration. When a certificate expires with no renewal documented, the driver's DQF is immediately flagged as non-compliant. See our driver qualification file software overview for a full walkthrough of how medical certificate tracking works in practice.
For a complete list of all documents that belong in a DQF alongside the medical certificate, see our driver qualification file checklist.
Frequently Asked Questions
How long is a DOT medical card valid?
Where can a driver get a DOT physical exam?
What medical conditions disqualify a CDL driver?
Can a CDL driver operate with an expired DOT medical card?
Never Miss a Medical Certificate Expiration
CarrierLens tracks every driver's DOT medical certificate expiration date and sends automatic alerts at 60, 30, and 7 days before it lapses. When the new certificate arrives, upload it once and CarrierLens updates the DQF automatically — keeping the driver's compliance status current.
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