What a DOT Physical Actually Covers

Updated 9 min read

Part of Driver Files & Medical

49 CFR §391.41(b)

The regulation lists thirteen conditions a driver must meet to be physically qualified. Only two of them are numbers — vision and hearing. The other eleven are clinical judgements the certified medical examiner makes, which is why two examiners can reach different answers on the same driver.

Low-poly render of an empty medical examination room
Twenty minutes in a room that decides the next two years of your licence.

Who may examine you

Not any doctor. The examination must be performed by a medical examiner listed on the National Registry of Certified Medical Examiners — a clinician who has trained on the motor carrier standards and passed the federal test. Chiropractors, advanced practice nurses and physician assistants are all on the register alongside physicians; the credential that matters is the registry listing, not the letters after the name. An employer's own fitness-for-duty physical is a different exam that does not count — DOT vs non-DOT physical sets out where the two part ways.

Check the examiner is currently listed before you sit down. An exam performed by someone who has dropped off the register is not a valid exam, and the driver — not the clinic — carries the consequence at roadside.

Low-poly render of an empty medical examination room
Any examiner on the national registry, in any room that meets the standard.

The exam, station by station

The whole thing usually takes under half an hour and follows the same order almost everywhere, because the federal form follows that order.

  1. 01History. You complete the driver's half of the form: conditions, surgeries, medications, sleep, alcohol and drug use. It is signed. A deliberate omission here is the one thing on the whole visit that can be treated as falsification.
  2. 02Vitals. Height, weight, pulse and blood pressure. Blood pressure is where most cards get shortened rather than refused.
  3. 03Vision and hearing. The two standards with numbers in them. Bring your glasses or lenses — correction is allowed and expected.
  4. 04Urinalysis. A dipstick for protein, blood, sugar and specific gravity. It is a screen for underlying disease, not a drug test — the drug test is a separate programme with its own chain of custody.
  5. 05Physical examination. Heart, lungs, abdomen, spine, limbs, neurological signs. This is where the eleven judgement conditions are assessed.

The two numeric standards

StandardThresholdCorrection allowed
Distant acuity, each eye20/40 Snellen, with or without correctionYes
Binocular acuity20/40 Snellen in both eyesYes
Field of vision70° horizontal, each eyeNo
Colour recognitionstandard red, green and amber traffic signalsNo
Hearing, whisper test5 ft, better earHearing aid allowed
Hearing, audiometric≤ 40 dB average at 500, 1000, 2000 HzHearing aid allowed

Missing a standard is not automatically the end. A driver who fails the vision standard in the worse eye can qualify under the alternative vision standard; a driver on insulin qualifies under §391.46; a driver missing a limb can hold a skill performance evaluation certificate. Each is a separate pathway with its own form and its own 12-month re-examination interval.

Low-poly render of a clinic exam room: a blank eye-chart board on a stand, a blood-pressure cuff on a rolling stand and a stool against a pale wall
The two stations with numbers attached: the eye chart on its stand and the blood-pressure cuff beside it.

What the examiner records

The examiner signs a determination and records the certificate. The maximum term is 24 months, and shorter terms are common: a driver being monitored for blood pressure, a driver in an exempt intracity zone (12 months), a driver on the vision or insulin pathways (12 months). A short card is not a failure — it is the examiner keeping you working while something is watched.

The certificate is only half the job. For a CDL holder, the certification status has to reach the state licensing authority and appear on the driving record. Since 23 June 2025 the examiner's result travels to the state electronically and a paper certificate goes only to drivers without a CDL — so check the record after the exam rather than relying on a card in the wallet.

The mechanics of getting it there, and what to do when it lapses, are in the medical card guide. The card itself lives in the driver qualification file.

Sources

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