Knowledge Center
Eating, sleeping, and staying healthy from the driver's seat.
Only examiners on FMCSA's National Registry can perform a DOT physical that counts. How the registry works, how to search and verify a listing before you book, who can be an examiner, and how to choose well when any listing is legal.
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What actually happens at a DOT physical — the health-history form, the vitals and vision/hearing checks, the urinalysis that is not a drug test, the hands-on exam, and how the examiner decides between a two-year card, a shorter one, or none.
9 min read →
The thirteen physical qualification standards in 49 CFR 391.41(b), in plain English — what each one addresses, which ones have alternative paths like 391.44, 391.46, and the SPE certificate, and where examiner judgment does the deciding.
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What the regulation actually says about blood pressure (less than you think), where the familiar numeric staging really comes from, how examiners commonly use it, and what drivers can do before the exam — without gaming anything.
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How diabetes is handled at the DOT physical — the ordinary path for non-insulin treatment, the 391.46 path that replaced the old exemption program for insulin-treated drivers, the MCSA-5870 form, and the 12-month certificate cap.
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The single most misunderstood topic in driver medicine: there is no standalone federal sleep-apnea regulation. What actually governs — examiner judgment under the general standards, FMCSA guidance, and carrier policy — and how treated drivers keep it routine.
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The two most measurable standards — 20/40 acuity with a 70-degree field, and the whisper-or-audiometric hearing test — plus the 2022 change everyone should know: vision moved from an exemption program to individual assessment under 391.44, while hearing kept its exemption path.
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Missing a standard as written is the start of a process, not the end of a career. The map of alternative paths — 391.44 and 391.46 regulation paths, the federal exemption programs, the SPE certificate for limb impairments, and the 391.47 dispute process.
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What the medication clause actually says — the Schedule I bar, the prescribing-practitioner exception, why marijuana remains barred as of this review date, and how examiners weigh any medication against safe operation.
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The clock that never stops: renewal timing, the four self-certification categories every CDL holder picks with their state, the electronic reporting transition, and how a lapsed medical certificate turns into a downgraded CDL.
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