What 391.43H means in plain language
FMCSR 391.43H requires that your medical examiner's certificate—the form documenting your physical fitness to operate a commercial motor vehicle—be completed and submitted in the proper format. When an inspector finds your medical certificate is filled out incorrectly, uses the wrong form version, or doesn't meet the formatting requirements, they cite this code.
This is different from not having a valid medical certificate at all (which falls under other codes like 391.41). Instead, 391.43H is about the paperwork itself being improperly formatted or submitted. Examples might include missing required fields, unsigned documentation, or use of an outdated or non-standard form.
The citation doesn't automatically sideline you from driving, but it creates a compliance record and signals to inspectors and your employer that your medical documentation needs attention.
What our enforcement data actually shows
Across our 13 million+ inspection records, 391.43H is one of the rarest violations in the FMCSR database. We have logged only 26 all-time citations for this code, with 20 citations in the last 12 months and 3 in the last 90 days. It ranks #1848 out of 3,036 FMCSR codes by citation volume.
The out-of-service rate for 391.43H is 19.2%—meaning about 1 in 5 drivers cited for this violation are removed from service. This is notably lower than the all-FMCSR average OOS rate of 31.4%, reflecting that improper certificate form issues are generally treated less severely than missing or invalid medical certification altogether.
Of the 26 all-time citations, 5 resulted in out-of-service orders and 21 did not. The low citation volume suggests that most motor carriers and drivers maintain compliant medical documentation, and inspectors flag this issue infrequently.
Who gets cited most
Our inspection records show citations for 391.43H concentrated in a small number of states. Texas leads with 5 citations in the last 180 days, followed by Illinois and North Carolina with 1 citation each.
Interestingly, the out-of-service rate varies significantly by state. In Texas, 80% of citations resulted in out-of-service orders (4 out of 5). Illinois saw a 100% out-of-service rate on its single citation. North Carolina had 0% (0 out of 1). This variation suggests different enforcement practices or citation timing—for example, Texas inspectors may cite this violation as part of a more comprehensive compliance failure, while North Carolina may cite it as an isolated paperwork issue.
No single carrier dominates the citation history. Our data shows ten carriers with one citation each across the all-time record, including ROMAS LLC, SUNRISE TRUCKING LLC, ECHOLS GLASS & MIRROR, MORETON TRUCKING LLC, BENNETT MOVING LLC, WHITE EVENT GROUP LLC, C D ROUSTABOUT LLC, CANADY LAWN & LANDSCAPING, LUX AUTO TRANSPORT INC, and RS TRANSFER SA DE CV. This distribution indicates the violation is scattered across the industry rather than concentrated in a particular fleet.
How severe is this compared to similar codes
391.43H sits at the lower end of severity within the Driver Fitness category. Compare it to related medical certification violations:
- 391.41APC (Operating without a valid medical certificate in possession or on file) has been cited 49,539 times with a 97.1% out-of-service rate. That's a much higher enforcement volume and severity.
- 391.41(a) (Physical qualification — general) shows 42,270 citations with a 16.2% OOS rate, which is closer to 391.43H's severity profile but covers a broader range of fitness issues.
- 391.41(a)(1) has 35,686 citations with a 16.7% OOS rate, again suggesting that form-only issues are treated more leniently than substantive qualification defects.
The takeaway: inspectors prioritize actual medical unfitness or missing certificates far more than paperwork format errors. 391.43H is a compliance gap, not typically an immediate safety threat.
How to avoid it
To prevent a 391.43H citation, focus on proper medical documentation and pre-trip oversight:
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Use the current FMCSA form. Verify that your medical examiner is using the latest DOT medical certificate form. Outdated versions are a common trigger. Check the FMCSA website or your state's driver licensing agency to confirm the form version in use.
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Ensure all fields are legible and complete. Your medical examiner must sign the form, date it, and fill in all required fields—no blank boxes, no illegible handwriting. Before leaving the exam, review the certificate to confirm nothing is missing.
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Keep your certificate in your possession during operation. Have a copy on hand or on file with your state's driver licensing agency. Our inspection data shows that 396.17C (no proof of periodic inspection) frequently co-occurs with medical certificate issues, suggesting inspectors find gaps when reviewing your documentation package.
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If you drive a Freightliner, Ford, International, Kenworth, or other common heavy-duty truck, confirm your carrier's pre-trip inspection routine includes certificate review. Our data shows Freightliners account for 4 citations, Ford for 3, International for 3, and Kenworth for 3. While this may reflect market share, it underscores that certificate compliance is a universal requirement regardless of vehicle type.
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Watch for co-occurring defects. Our records indicate that 391.43H often appears alongside vehicle maintenance issues—like 393.9 (inoperable required lamp), 393.95B (missing warning devices), and brake violations. A single roadside inspection catching a paperwork issue may escalate if your vehicle also has defects. Stay on top of pre-trip inspections.
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Inform your fleet safety manager immediately if your medical certificate is denied, expired, or returned for correction. Don't operate under a questionable certificate. Contact your medical examiner, get the form reissued correctly, and ensure it's filed before your next shift.
The rarity of this citation (only 20 in the last 12 months nationwide) suggests it's highly avoidable with basic documentation discipline.