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Missouri CDL Medical Certificate Guide

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Commercial drivers in Missouri are required by federal and state regulations to maintain a valid Medical Examiner’s Certificate (MEC) to operate a commercial motor vehicle (CMV). This document confirms a driver’s physical qualifications, ensuring safety for all road users.

Who Needs a Medical Certificate?

Any driver who operates a CMV that requires a Commercial Driver License (CDL) must provide proof of medical qualification. This applies to:

  • Interstate drivers (traveling across state lines)
  • Intrastate drivers (within Missouri) who operate CMVs
  • Drivers applying for or renewing a CDL

Exceptions may exist for certain exempt vehicle operations such as military, emergency response, or farming, but the majority of CDL holders must comply.

Medical Certification Requirements

To meet medical certification requirements, Missouri CDL holders must:

  1. Undergo a DOT physical exam from a Federal Motor Carrier Safety Administration (FMCSA)-certified medical examiner. A list of certified providers is available on the FMCSA National Registry.
  2. Receive a Medical Examiner’s Certificate (Form MCSA-5876) if deemed physically qualified.
  3. Submit the certificate to the Missouri Department of Revenue (DOR) within the required timeframe.

Failure to maintain an updated certificate can lead to CDL disqualification.

Self-Certification Categories

Drivers must declare their type of commercial driving through a process called self-certification. The four categories are:

  • Non-Excepted Interstate (NI) – Requires a medical certificate; most common type.
  • Excepted Interstate (EI) – No certificate needed; for exempt operations (e.g., federal government).
  • Non-Excepted Intrastate (NA) – Certificate required; operates only in Missouri.
  • Excepted Intrastate (EA) – No certificate required; for certain intrastate exempt operations.

Missouri drivers must indicate the appropriate category when applying for or renewing their CDL.

How to Submit Your Medical Certificate

Missouri CDL holders must submit their Medical Examiner’s Certificate to the DOR:

  • In person at a Missouri license office
  • By fax to (573) 526-5416
  • By email at [email protected]
  • By mail to:
    Missouri Department of Revenue
    CDL Medical Certification
    P.O. Box 200
    Jefferson City, MO 65105-0200

Be sure to include your name, driver’s license number, and contact information with your submission.

Renewal and Updates

A medical certificate is typically valid for up to 24 months, though some conditions may require shorter intervals. It’s the driver’s responsibility to:

  • Track the expiration date
  • Schedule follow-up exams as needed
  • Submit updated certificates promptly

Failing to provide updated documentation will result in CDL disqualification until resolved.

CDL Downgrade and Disqualification

If a driver does not submit or update their medical certificate:

  • The Missouri DOR will notify the driver of non-compliance.
  • A downgrade of CDL status may occur, removing commercial driving privileges.
  • Reinstatement requires submitting a valid certificate and may involve additional fees or reapplication steps.

For further information on maintaining your CDL and related requirements, see:

Always stay current with FMCSA and Missouri DOR guidelines to ensure uninterrupted CDL status.