CDL Medical Certificate Requirements: What Drivers Must Keep Current to Stay Legal
An expired medical certificate is one of the most common reasons CDL drivers get placed out of service at roadside. The certificate must be current, the physical must be conducted by a National Registry examiner, and the carrier must maintain it in the driver qualification file. Here's what the regulation requires step by step.
Every CDL driver operating a commercial motor vehicle in interstate commerce must maintain a current medical examiner's certificate. The certificate proves the driver meets the physical standards required under federal regulations. An expired card means the driver is medically unqualified — and an unqualified driver behind the wheel is a driver OOS condition.
What the Regulation Actually Requires
Medical qualification standards for CMV drivers are established at 49 CFR § 391.41 (physical qualifications), 49 CFR § 391.43 (medical examination procedures), and 49 CFR § 391.45 (who must be examined). The examination must be conducted by a certified medical examiner listed on the FMCSA National Registry of Certified Medical Examiners — established under the NRCME Final Rule (78 FR 35420).
Since May 21, 2014, CDL drivers can only obtain medical certificates from medical examiners who are listed on the National Registry. Certificates issued by non-Registry examiners are not valid for federal purposes, even if the examiner holds a medical license. This is one of the most common DQF compliance failures found during audits.
Step-by-Step Practical Breakdown
Step 1: Find a National Registry Medical Examiner
Search for a certified examiner at nationalregistry.fmcsa.dot.gov. You can search by zip code, city, state, or examiner name. Verify the examiner is listed before scheduling — registry status can change if an examiner's certification lapses. The carrier or driver is responsible for confirming the examiner's current National Registry status.
Step 2: Complete the Medical Examination
The examination uses Form MCSA-5875 (Federal Motor Carrier Safety Administration Medical Examination Report). The examiner evaluates:
- Vision: 20/40 in each eye with or without correction; field of vision; color recognition
- Hearing: Perceive a forced whispered voice in better ear at not less than 5 feet
- Blood pressure and pulse
- Urinalysis (for glucose and protein, not drug screening)
- Physical examination: cardiovascular, respiratory, musculoskeletal, neurological
- Review of medical history for disqualifying conditions
The examiner determines whether the driver meets the § 391.41 physical qualification standards, with or without exemptions or waivers for specific conditions.
Step 3: Receive the Medical Examiner's Certificate
When qualified, the examiner issues Form MCSA-5876 — the Medical Examiner's Certificate. The maximum certification period is 24 months. Examiners can issue shorter certification periods for drivers with conditions that require more frequent monitoring, such as controlled hypertension or treated sleep apnea.
The examiner also electronically submits the examination results to FMCSA's National Registry within 24 business days. This electronic submission links the certification to the driver's CDL record through the state DMV.
Step 4: Submit the Certificate to Your State DMV
CDL holders must submit a copy of their medical examiner's certificate to their state licensing agency within 24 business days of the examination. The state then updates the CDL record to reflect the medical certification status and expiration date.
This linkage between the medical certificate and the CDL record is what roadside officers verify — they check the CDL record in the state system, not just the paper card. If the state record hasn't been updated, the officer may see an expired or missing certification even when the driver has a current certificate in hand.
Step 5: Carry the Certificate and Renew Before Expiration
CDL drivers must carry their medical examiner's certificate and present it to an officer upon request. The certificate must be the original or a legible copy. Schedule renewals at least 30 days before the current certificate expires to allow time for the state DMV update to process.
The carrier must maintain a copy of the current medical examiner's certificate in the driver's DQF. See our DQF guide for all required DQF contents and retention periods.
What Auditors and Inspectors Actually Look For
Expired certificate: The most common issue. Auditors verify the expiration date on the certificate in the DQF. Inspectors check the CDL record in the state system. Both must show a current certification.
Certificate not carried: Failure to carry the medical certificate is a separate violation from having an expired one. The driver must have it in the cab during any operation.
Non-Registry examiner: If the examiner who issued the certificate is not listed on the National Registry, the certificate is invalid regardless of the exam date. Auditors verify the examiner's National Registry status using the NPI number on the certificate.
DQF verification: The DQF must contain the medical certificate, not just a note that one was issued. Auditors pull the physical document — a reference to a file location is not sufficient.
Self-certification mismatch: CDL holders self-certify their driver type to the state DMV. If a driver self-certified as "non-excepted interstate" (which requires a federal medical certificate) but doesn't have a valid certificate on file with the state, the CDL is invalid.
| Medical Condition | Standard Certification | Shorter Period Possible | Notes |
|---|---|---|---|
| No known disqualifying conditions | 24 months | No | Maximum certification period; most drivers qualify at this level |
| Controlled hypertension (Stage 1) | 12 months | Yes | Annual recertification required; examiner may issue shorter period |
| Controlled hypertension (Stage 2) | 3 months initially | Yes | 3-month certificate initially; if controlled and stable, annual certificate thereafter |
| Insulin-treated diabetes mellitus (ITDM) | 12 months | Yes | Requires federal exemption; examiner certification per exemption conditions |
| Sleep apnea (treated and compliant) | 12 months | Yes | Requires compliance data from CPAP/BiPAP; annual recertification |
| Hearing impairment (with waiver/exemption) | 24 months | Possible | Exempt from hearing standard under federal exemption program |
| Vision impairment (with waiver/exemption) | 12 months | Yes | Federal vision exemption required; annual recertification |
| Missing limb (with SPE certificate) | 24 months | Yes | Skill Performance Evaluation certificate required; examiner reviews SPE |
| Epilepsy (in remission per exemption) | 12 months | Yes | Federal exemption required; off seizure medication for required period; annual review |
Frequently Asked Questions
Can a driver continue operating after their medical certificate expires?
No. An expired medical certificate means the driver is no longer medically qualified to operate a CMV. Operating with an expired certificate is a driver OOS condition. The carrier must remove the driver from safety-sensitive duties immediately upon expiration. There is no grace period.
What is the difference between a DOT physical and a regular medical exam?
A DOT physical is a specific examination using FMCSA Form MCSA-5875, conducted by a National Registry certified examiner, focused on the § 391.41 qualification standards. A general medical examination by a primary care physician does not satisfy the DOT physical requirement, even if the physician determines the driver is healthy. The form, the examiner's registry status, and the scope of the examination all matter.
Does an owner-operator need to maintain their own medical certificate in a DQF?
Yes. Owner-operators must maintain a driver qualification file for themselves just as a carrier maintains DQFs for employed drivers. The DQF must include the owner-operator's current medical examiner's certificate and all other required DQF documents. Auditors treat owner-operators as both carrier and driver and verify both sets of requirements.
Can a driver with insulin-treated diabetes get a CDL?
Yes, under the federal insulin-treated diabetes mellitus (ITDM) exemption program. Drivers must apply for and receive a federal exemption from FMCSA, comply with the exemption conditions (regular A1C testing, ophthalmologist review, etc.), and be certified by a National Registry examiner under the exemption terms. The exemption must be renewed annually.
What happens if an examiner loses their National Registry certification after issuing a certificate?
If an examiner's National Registry status lapsed after they issued a certificate, FMCSA's position is that the certificate remains valid if the examiner was listed at the time of the examination. Carriers should document the examiner's registry status at the time of the examination in the DQF as a precaution.
How long must medical certificates be kept in the DQF?
The current and previous medical certificates must be retained in the DQF during the driver's employment and for 3 years after the driver leaves the company. See our FMCSA record retention guide for complete DQF retention requirements.
Related Resources
- Driver Qualification File — all required DQF contents and how long to keep each document
- Out-of-Service Violations — how an expired medical certificate triggers driver OOS
- FMCSA Record Retention Requirements — complete retention schedule for all compliance records
Get the FMCSA Compliance Quick-Reference Toolkit
Includes the driver qualification tracking worksheet — covering medical certificates, CDL renewals, annual MVR reviews, and drug testing records — so you know every driver's status at a glance.
Download the FMCSA Compliance Quick-Reference Toolkit →Manage compliance the smart way
Start your free trial of BridgeWorks One™ — the compliance and operations platform built for owner-operators and small fleets.
Start Free Trial