DOT Diabetes Exemption Form: MCSA-5870 Filing and Annual Renewal

The MCSA-5870 form requirements are set out in 49 CFR 391.46: your treating clinician must evaluate your diabetes management, review at least three months of electronic blood glucose records, document your insulin history and any complications, and sign the Insulin-Treated Diabetes Mellitus Assessment Form. You then have 45 calendar days from that signature to present the form to a Certified Medical Examiner (CME) on the FMCSA’s National Registry, who conducts a DOT physical and decides whether to issue your Medical Examiner’s Certificate.¹

What Your Clinician Must Document

The MCSA-5870 is the anchor document in the certification process. Your treating clinician completes it after evaluating your diabetes control, and it covers far more than blood sugar numbers. The form asks the clinician to record:²

The date you began using insulin
Whether you maintained three months of electronic blood glucose records and provided them for review
How many times per day you test
Whether you comply with your self-monitoring plan
Whether you had any severe hypoglycemic episodes in the preceding three months
Whether your hemoglobin A1C has been measured intermittently over the last 12 months, with the most recent result within the preceding three months
Diabetic complications, including kidney disease, cardiovascular disease, neurological issues, peripheral neuropathy, and lower-limb problems such as foot ulcers or amputations
The date of your last comprehensive eye exam and any diagnosis of severe non-proliferative or proliferative diabetic retinopathy, macular edema, cataracts, glaucoma, or other progressive eye disease

By signing, the clinician attests that you maintain a stable insulin regimen with properly controlled diabetes. The regulation does not name a specific A1C cutoff that automatically disqualifies you. That judgment sits with the treating clinician and, ultimately, the CME. An A1C suggesting poor control will make confident certification difficult.

One item on the form is an absolute bar. A “yes” answer to severe non-proliferative diabetic retinopathy or proliferative diabetic retinopathy is a permanent disqualifier, and the CME cannot certify you.³

Who Counts as the Treating Clinician

The treating clinician is the healthcare professional who manages your diabetes and prescribes your insulin, as authorized by their state licensing authority.¹ The regulation does not restrict this to endocrinologists. A primary care physician, nurse practitioner, or physician assistant who prescribes and manages your insulin qualifies, provided their state license authorizes it. What matters is that this person actually manages your treatment, not just that they have access to your records.

The Three-Month Electronic Glucose Record

This requirement trips up more drivers than any other part of the form. To qualify for a full 12-month certificate, you need at least three months of self-monitoring records taken with an electronic glucometer. The glucometer must store every reading, record the date and time of each one, and allow the data to be electronically downloaded.³ Handwritten logs do not count, however detailed.

You bring either a printout of the electronic records or the glucometer itself to your clinician. The clinician must see the full preceding three months while you were on insulin. If you are newly prescribed insulin or lack three months of electronic records, the CME has discretion to issue a temporary certificate for up to three months so you can build the log history.²

A practical note on devices: the regulation specifies an “electronic glucometer.” Continuous glucose monitors are a different class of device. If you rely only on a CGM and no traditional glucometer, confirm with your clinician and CME that your setup satisfies the regulatory language before your appointment. The safest approach is to use a downloadable glucometer even if you also use a CGM day to day.

The 45-Day Window

The clock starts when the treating clinician signs and dates the MCSA-5870. Within 45 calendar days of that signature, the CME must receive the completed form and begin your physical examination. Miss it and the form expires; your clinician has to complete a new one.¹

One helpful detail. The final certification determination does not have to be completed inside 45 days. The CME only needs to receive the form and start the exam within that period.³ Book your CME appointment close behind the clinician visit so you are not scrambling.

At the CME Appointment

You take the completed MCSA-5870 to a Certified Medical Examiner on the FMCSA’s National Registry. You can search by location at nationalregistry.fmcsa.dot.gov.⁴

The CME performs a standard DOT physical, which includes vision and hearing tests, blood pressure checks, a urinalysis screening for protein, blood, and sugar, and a general assessment of your fitness to operate a commercial motor vehicle.⁵ For insulin-treated drivers, the CME also reviews the MCSA-5870 and applies independent medical judgment on whether your insulin regimen is stable and your diabetes properly controlled.¹

If you meet all physical qualification standards, the CME issues a Medical Examiner’s Certificate, Form MCSA-5876.⁶ For insulin-treated drivers, the maximum validity is 12 months, compared with up to 24 months for drivers without conditions requiring closer monitoring.⁷ The CME keeps a copy of the MCSA-5870 in your examination file.

After a Severe Hypoglycemic Episode

A severe hypoglycemic episode is one that requires help from another person, or that results in loss of consciousness, a seizure, or a coma.⁸ If you have one, stop driving your CMV immediately and report it to the clinician who signed your most recent MCSA-5870.

You cannot go back to driving until that clinician evaluates you, determines the cause has been addressed, and confirms you have regained stable control. The clinician documents this by completing a new MCSA-5870, and you return to a CME for re-examination.⁸ There is no fixed waiting period. Return depends on how quickly your clinician can confirm your control is stable again. The form specifically asks about episodes in the preceding three months, so concealment is not an option worth considering.

Annual Renewal

Because the certificate lasts no more than 12 months, the whole process repeats every year: a fresh MCSA-5870, a new three months of electronic records, and another CME physical.¹ Start planning at least two months before expiration. You need room for the clinician visit, the form, and the CME appointment, all while keeping inside the 45-day signature-to-exam window. If your certificate expires first, you are medically unqualified to operate a CMV in interstate commerce until you obtain a new one, and there is no grace period.

If you drive only within a single state, federal rules may not govern you. State medical standards for intrastate-only operation vary, so check with your state’s motor carrier division for the requirements that apply to you.

1
eCFR. 49 CFR 391.46 Physical Qualification Standards for an Individual With Diabetes Mellitus Treated With Insulin for Control
2
Federal Motor Carrier Safety Administration. Insulin-Treated Diabetes Mellitus Assessment Form MCSA-5870
3
Federal Register. Qualifications of Drivers; Diabetes Standard
4
FMCSA National Registry. Search Medical Examiners
5
eCFR. 49 CFR Part 391 Subpart E Physical Qualifications and Examinations
6
Federal Motor Carrier Safety Administration. Medical Examiner’s Certificate (MEC), Form MCSA-5876
7
eCFR. 49 CFR 391.45 Persons Who Must Be Medically Examined and Certified
8
Federal Motor Carrier Safety Administration. Qualifications of Drivers; Diabetes Standard Final Rule