Sleep apnea and the DOT physical

There is no federal regulation that names sleep apnea, requires drivers to be screened for it, or sets a CPAP compliance number. Obstructive sleep apnea is judged under the general respiratory standard in 49 CFR 391.41(b)(5), and FMCSA's guidance asks examiners to focus on moderate-to-severe cases and to decide screening, referral and whether treatment is working case by case. In practice that means a driver with diagnosed, effectively treated sleep apnea can be certified, and the certified medical examiner decides what proof of treatment to accept.

The rule that applies

49 CFR 391.41(b)(5) says a person is physically qualified if the person has no established medical history or clinical diagnosis of a respiratory dysfunction likely to interfere with the ability to control and drive a commercial motor vehicle safely. The words that do the work are "likely to interfere". A diagnosis alone does not disqualify; untreated disease that makes you likely to fall asleep at the wheel does.

Paragraph D of the Medical Advisory Criteria (Appendix A to Part 391, revised January 2024) interprets that standard:

• D.1: many conditions interfere with oxygen exchange and may interfere with safe driving, including emphysema, chronic asthma, carcinoma, tuberculosis, chronic bronchitis and obstructive sleep apnea.
• D.2: if the examiner detects a possible undiagnosed or inadequately treated respiratory dysfunction that may be likely to interfere with safe driving, the examiner should confer with the treating provider or recommend referral to a specialist for further evaluation and therapy.

The criteria are advisory, but 391.43(c)(1) requires examiners to know them.

Why there is no sleep apnea rule

FMCSA and the Federal Railroad Administration published an advance notice of proposed rulemaking on moderate-to-severe obstructive sleep apnea in March 2016 and withdrew it on 8 August 2017 (82 FR 37038), saying they had decided not to issue a proposed rule at that time and that current safety programmes were the appropriate avenue. The withdrawal notice reminded examiners that there are no FMCSA rules or other regulatory guidance, beyond what it described, with guidelines for screening, diagnosis and treatment of sleep apnea in commercial drivers, and that certification decisions for such drivers are made on the examiner's medical judgement rather than a federal requirement. It also mentioned a January 2015 FMCSA bulletin to examiners on sleep apnea and recommendations from FMCSA's Medical Review Board in 2016, which FMCSA said it would consider when updating that bulletin.

There is also a statutory limit. FMCSA's January 2024 notice on the Medical Examiner's Handbook (89 FR 3892) discusses Public Law 113-45 (2013), which provides that FMCSA may implement or enforce a requirement for screening, testing or treatment of commercial drivers for sleep disorders only if it is adopted through a rulemaking. FMCSA's position in that notice is that the Handbook offers guidance only and that FMCSA has not adopted requirements on sleep apnea screening, testing or treatment.

What FMCSA's current guidance says

The Handbook itself is on FMCSA's website, which we could not reach from here. FMCSA's 2024 notice describes what the Handbook says about sleep apnea, and that is what we report:

• The federal regulations do not require examiners to screen for sleep apnea, do not require referral for testing, and do not specify diagnostic tests, treatments, or how to assess compliance with treatment.
• The guidance focuses on moderate-to-severe sleep apnea, because that is the level likely to interfere with safe driving under the standard. FMCSA added that untreated moderate-to-severe sleep apnea is associated with cardiovascular and cerebrovascular disease, metabolic disease and mortality.
• Using multiple risk factors to identify drivers at risk is described as a reasonable approach, rather than relying on a single factor. Whether a particular driver needs screening is left to the examiner.
• Whether treatment is adequate or effective is left to the examiner to decide on the individual facts.
• A draft recommendation to retest drivers treated with CPAP every 3 to 5 years was removed from the final Handbook.
• The Handbook keeps a link to the November 2016 joint recommendations of the Medical Review Board and the Motor Carrier Safety Advisory Committee on screening, diagnosing and certifying drivers with moderate-to-severe sleep apnea. FMCSA describes those recommendations as information, not requirements.

You will see specific CPAP usage thresholds quoted online. They do not appear in 391.41, in the Medical Advisory Criteria, or in the 2024 notice, and we could not verify their current status from an FMCSA source, so this page does not repeat them. Ask your examiner, before the appointment, what compliance record they want to see.

How it comes up at the exam

The health history in Section 1 of the MCSA-5875 asks two questions directly: question 25, about sleep disorders, pauses in breathing while asleep, daytime sleepiness and loud snoring, and question 26, whether you have ever had a sleep test. You sign a certification that your answers are accurate and complete, and false statements on required records are barred by 390.35. The examiner also examines your lungs and chest and your general appearance as part of the body-systems exam.

From there, the outcomes are the same as for any condition under 391.43(g):

• Certified, possibly for less than the maximum period if the examiner wants to monitor treatment. The examiner may always issue a shorter certificate.
• Determination pending for up to 45 days under 391.43(g)(4) while you get a sleep study or treatment records. The 2024 notice says pending status does not extend the expiry of your current certificate.
• Not qualified, if the examiner finds a respiratory dysfunction likely to interfere with safe driving. Under 391.43(g)(3) that ends any earlier certificate.

Mild sleep apnea

The guidance, as FMCSA describes it, is aimed at moderate-to-severe disease because that is what is likely to interfere with safe driving. FMCSA declined a request in 2024 to drop the words "moderate-to-severe" from that focus. So a mild diagnosis is not, by itself, a reason in the guidance to withhold a certificate. The examiner still decides, and still considers symptoms such as daytime sleepiness and any history of drowsy driving.

Narcolepsy and other sleep disorders

The 2024 notice says FMCSA revised the Handbook's sections on narcolepsy and idiopathic hypersomnia, removed references to sleep apnea from them, and added that those conditions should be diagnosed with an overnight laboratory sleep study followed by a Multiple Sleep Latency Test the next morning. They are separate conditions from sleep apnea, and the examiner may also consider them under 391.41(b)(8), which covers conditions likely to cause loss of consciousness or of the ability to control the vehicle.

On the road: the fatigue rule

Whatever your certificate says, 392.3 bars driving while your ability or alertness is so impaired, or so likely to become impaired, through fatigue, illness or any other cause, that it is unsafe to begin or continue, and bars a carrier from requiring or permitting it. A driver whose treatment has lapsed and who is sleepy at the wheel is covered by that rule on the day, independent of the medical card. The hours limits are on the hours of service page.

How the federal position got here

The result is that sleep apnea is handled by guidance and examiner judgement under a general standard, and any fixed federal screening or compliance requirement would need a new rulemaking.

Questions to ask before you book

• What records do you want to see for sleep apnea treatment, covering what period?
• If you have concerns, will you certify for a shorter period while I get records, or put the exam in pending status?
• Can I send the records ahead of the appointment?
• What is your National Registry number? Only an exam by a listed examiner counts under 391.43(a).
• Do you accept records sent electronically by my sleep provider, and in what format?

What to bring if you have sleep apnea

The rules do not list documents, so this follows from what the examiner has to decide, whether your condition is likely to interfere with safe driving and whether treatment is effective:

• The sleep study report showing the diagnosis and its severity.
• A note from the doctor who manages your treatment.
• If you use CPAP or another device, the usage report from the device or your provider covering a recent period. Ask the examiner in advance what period and format they want.
• If you had surgery or use an oral appliance instead, the treating provider's records on the result.

Paragraph D.2 of the criteria says the examiner should confer with the treating provider where treatment may be inadequate, so having that provider's contact details helps.

Example: a new diagnosis between exams

Illustration only. A driver's wife complains about his snoring and he falls asleep during the day. His doctor orders a sleep study, which finds moderate obstructive sleep apnea, and he starts CPAP. His medical card has eight months left. Two rules matter now. First, 391.45(g) requires an examination for any driver whose ability to perform normal duties has been impaired by a physical or mental disease, so if the condition impaired his ability to drive he should not wait for the card to expire; he should ask his examiner. Second, 392.3 applies every day in the meantime. At the exam he answers "yes" to questions 25 and 26, brings the study and a device usage report, and the examiner, satisfied the treatment is effective, certifies him for one year to monitor it.

What examiners are looking for, and common mistakes

• Answering "no" to question 25 or 26 when the answer is "yes". It is a certified statement, and a diagnosis on record elsewhere can surface later.
• Stopping treatment after the card is issued. 392.3 still applies, and the next exam will ask.
• Assuming one risk factor means a mandatory sleep study. FMCSA's guidance, as described in its 2024 notice, favours multiple risk factors over a single one, and leaves the decision to the examiner. The examiner can still refer you.
• Arriving without records and ending up in pending status on the last day of your card.
• Relying on a number from a forum as if it were a federal rule. Ask the examiner what they need.

Certified examiners near you are listed in the DOT physical directory. How the rest of the visit works is on what happens at a DOT physical.