Who this is for: CDL applicants, CDL holders, fleet managers
CDL Physical Requirements — Overview of Medical Standards
CDL drivers must meet federal medical standards to obtain a DOT medical certificate. Key areas include vision, hearing, blood pressure/cardiovascular health, and absence of certain disqualifying conditions. A certified medical examiner conducts the exam.
Important Notice
This is an educational overview of medical standards. The actual DOT physical exam must be conducted by a certified medical examiner. Do not rely on this page for medical advice.
Who must meet DOT medical standards
Interstate CDL drivers must obtain and maintain a DOT medical certificate issued by a FMCSA-certified medical examiner. The medical examiner must be listed on the National Registry of Certified Medical Examiners (NRCME). Intrastate-only drivers may be subject to state medical standards, which can differ from federal standards.
Key medical standards — overview only
Federal medical standards (49 CFR Part 391, Subpart E) cover: distant visual acuity of at least 20/40 in each eye (with or without correction); field of vision of at least 70 degrees in each eye; ability to perceive a forced whispered voice at 5 feet or greater; first perception of hearing without a hearing aid adequate for ordinary conversation; and blood pressure not exceeding certain thresholds. These are summaries — the actual medical standards and their application require a qualified examiner.
Conditions that may require additional evaluation
Conditions like diabetes (especially insulin-treated), heart disease, seizure history, sleep apnea, and certain mental health conditions may require additional documentation or may affect certification status. The certified medical examiner makes the determination based on the full clinical picture. A driver with a disqualifying condition may apply for a federal exemption in some cases.
Finding a certified medical examiner
Use the FMCSA National Registry of Certified Medical Examiners (nationalregistry.fmcsa.dot.gov) to find a certified examiner in your area. Only examiners on this registry can issue a valid DOT medical certificate for interstate CDL purposes.
The health history form — what you must disclose
Before the physical examination, you complete Form MCSA-5875, the Medical Examination Report. It asks about your history with cardiovascular conditions, neurological disorders, respiratory conditions, diabetes, vision and hearing issues, musculoskeletal problems, mental disorders, substance use, and current medications. The form requires honest disclosure — failing to disclose a known condition that later affects your certification can result in consequences beyond just the medical decision. The examiner uses this form as the basis for the physical and for any follow-up documentation requests.
Medications and CDL qualification
You must disclose all medications — prescription and over-the-counter — on the health history form. Certain medications affect alertness, reaction time, or cardiovascular function in ways that may affect certification. The examiner evaluates whether the medication and the underlying condition it treats are compatible with safe commercial vehicle operation. Bring a complete list with dosages and the names of prescribing physicians. If you're taking a medication that concerns you, consult with your treating physician before the exam.
Sleep apnea and CDL certification
Obstructive sleep apnea is not an explicitly disqualifying condition under the federal medical standards, but it is one of the most commonly encountered issues in CDL physical exams. A medical examiner who suspects significant untreated sleep apnea may issue a conditional or shortened certification pending evaluation and treatment. Drivers diagnosed with moderate to severe OSA are typically required to demonstrate compliance with treatment — usually CPAP therapy — before receiving a full certification period. The examiner may issue a one-year certificate while waiting for compliance documentation. Once a driver can document consistent CPAP use and improvement, a standard two-year certification becomes possible. Drivers who have been diagnosed with sleep apnea and are managing it effectively should bring documentation of their treatment compliance to the physical exam rather than waiting for the examiner to ask.
FMCSA exemption programs for otherwise disqualifying conditions
Federal regulations include exemption programs for several conditions that would otherwise prevent certification. The Federal Vision Exemption Program allows drivers who do not meet the standard distant visual acuity or field of vision requirements to apply for an individual exemption based on their driving safety record. The Federal Diabetes Exemption Program allows insulin-treated diabetics — previously automatically disqualified — to operate in interstate commerce under specific monitoring conditions. There is also a hearing exemption process. Applying for an exemption takes time: applications require documentation from treating physicians, a review period by FMCSA, and ongoing compliance conditions once granted. Drivers who believe they may qualify should begin the exemption process well before any certification lapses. Operating without a valid certificate while an exemption application is pending is not permitted.
Frequently Asked Questions
Does my regular doctor need to be on the NRCME?
Yes, for a DOT physical for an interstate CDL driver, the examiner must be certified and listed on the FMCSA National Registry. Not all physicians are certified. Use the NRCME locator to find a qualified examiner.
How often must CDL drivers have a DOT physical?
The maximum certification period is 24 months. Some drivers receive shorter certifications due to health conditions — 12 months, 6 months, or less. There is no minimum — a driver can get a new physical at any time. The medical certificate must be current at all times when the driver operates an interstate CMV.
What is the urinalysis part of the DOT physical testing for?
The DOT physical urinalysis screens for glucose (sugar) and protein in the urine, which can indicate diabetes or kidney issues. It is not a drug test. Pre-employment DOT drug testing is a separate process conducted at a certified collection site and analyzed by a certified laboratory under 49 CFR Part 40.