391.45B: Expired Medical Examiner's Certificate – Driver Q&A

Not automatically. Across our 13 million inspection records, drivers cited for 391.45B are placed out of service only 15.9% of the time (283 out of 1,782 all-time citations). That's significantly lower than the 31.4% average across all FMCSR codes. Most inspectors allow you to get it resolved without an immediate OOS order, but enforcement varies by state. In Illinois, 80% of citations resulted in OOS (20 out of 25 in the last 180 days), while in New Mexico and Iowa, zero citations led to OOS. Your risk depends partly on where you're stopped.

First, schedule a medical exam with an FMCSA-certified examiner immediately—don't delay. Second, check if you were cited for related violations. Our inspection records show that when 391.45B appears, it commonly co-occurs with operating without a CDL (383.23A2, 8 shared inspections in the last 90 days) or operating while ill/fatigued (392.2C, 6 shared inspections). If you have those too, address them in parallel. Third, document your exam appointment and get the new certificate filed with your state DMV. Keep proof of the new certificate and exam date in your records.

391.45B is less severe than similar violations. Operating without a valid medical certificate in possession (391.41APC) carries a 97.1% OOS rate across 49,539 citations—nearly six times higher than 391.45B's 15.9% rate. Operating without a CDL (383.23A2) shows a 98.4% OOS rate (50,385 citations). However, general physical qualification violations (391.41(a)) run 16.2% OOS (42,270 citations), nearly identical to 391.45B. The distinction matters: an expired certificate is usually treated as a documentation gap, while never having one is treated as a disqualifying defect.

In the last 180 days, our records show North Carolina leads with 51 citations (39.2% OOS rate), followed by Illinois with 25 citations (80.0% OOS rate), and New Mexico with 14 citations (0% OOS rate). Together these three states account for 90 of the last 180 days' citations. If you operate in North Carolina or Illinois, the enforcement climate is tighter—Illinois especially has a high likelihood of an OOS order if cited.

FMCSR 391.45B falls under the Driver Fitness BASIC category in FMCSA's Compliance, Safety, Accountability (CSA) program. All citations in this category contribute points to your driver record and your carrier's Safety Management Cycle (SMS) profile, but the exact point weight and scoring multiplier depend on the age of the citation and your carrier's violation history. Your best resource is your carrier's safety manager or the FMCSA CSA website. The important fact: this violation affects both you and your carrier's DOT ratings.

Our 12-month trend shows a sharp spike in May 2026 (162 citations, 52 OOS), then a gradual decline. June averaged 77 citations, and by March 2026 the rate had settled to 19 citations. Last 90 days: 48 citations with a 31.3% OOS rate, slightly above the all-time 15.9% baseline. The data suggests heightened focus earlier in the year, now returning to normal enforcement volume. If you're at risk, renew your medical certificate well before expiration to avoid a citation during any enforcement surge.

Yes, you can submit a DataQs (DataQ Record Request) to challenge any inspection record, including 391.45B citations. DataQs are handled by the FMCSA's Safety Management Cycle office and reviewed against roadside inspection documentation. If the inspector found an expired certificate on file, DataQs success depends on whether you can prove the certificate was valid at the time—for example, by submitting the actual exam results or state DMV records. Keep copies of all medical exams and certificates. Documentation challenges succeed more often than equipment disputes, so gather your proof and file promptly if you believe the citation was incorrect.

West Texas Truck Solution LLC (USDOT 4287116) leads with 5 all-time citations, followed by Garza Sand & Construction LLC (USDOT 3328440) with 4. This is a compliance issue affecting small and mid-size carriers across the country—no single carrier dominates the dataset. If you work for or manage one of these carriers, it signals a systemic gap in medical certificate renewal tracking. Implement a calendar reminder system and audit all driver files quarterly to catch expirations before roadside inspection.