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Guide: Everything you need to know about taking the HGV Medical Exam

18 March 2025

Step-by-Step: Completing the HGV Medical Test

Whilst you don’t have to be fit enough to run a marathon, swim a hundred lengths or do 20  push-ups to be a truck driver, it’s a legal requirement for commercial drivers to be fit and healthy in order to legally drive on public roads. That’s why a medical examination is compulsory for all HGV, LGV, PCV, taxi and ambulance drivers. Whilst the examination is conducted by a physician, it’s up to the DVLA to determine whether you’re fit to drive. As long as you have relatively good health, you should pass your HGV medical examination and be ready for the next steps of getting your licence.  Before you know it, you’ll be on the roads!

Here’s a step-by-step guide to a successful – and speedy – completion of the process.

Who can do the examination for you?

Your HGV medical test must be conducted by a qualified medical doctor registered with the General Medical Council. Making your own GP first choice. However, they won’t do it for free. Costs will vary across the UK – our quick enquiry delivered a quote of £120. And, as you’ll know, if you tried to book a GP appointment recently, you might have to wait a while.

A speedier alternative is to go private, where you’ll find it much easier to secure an  appointment. Costs vary enormously. Some websites quote as little as £50. A telephone enquiry delivered a £165 quote. It’s worth noting that some of the cheaper quotes were a bit like some budget airlines, with lots of add-ons bumping up the cost considerably.

It’s worth asking your employer beforehand, as they may have a policy in place to cover part/all of the cost.

Downloading and preparing the D4 Medical Examination Report

Before attending your HGV medical test you’ll need to obtain a D4 Medical Examination Report form. It can be downloaded at no cost from the UK.Gov website. Once you’ve printed a copy, there are sections for you to complete before your appointment. Remember to take the D4 to your appointment for the doctor to complete their sections during your HGV medical test.

Once completed send your D4 Medical and Vision assessment to the DVLA at the address given on the D4 document. Remember to include your driving licence and D2 application form. The paperwork will take around two weeks to be processed.

Attending HGV medical test – what to expect

The examination will take between 30 and 45 minutes. There are two parts:

The first section is a general chat about your health and medical history to highlight any existing medical conditions that could impact your ability to drive professionally. In all cases you must be honest with your answers. If any medical conditions not disclosed during your HGV medical test come to light in the future, you could face fines of up to £1,000 and, in some cases, you may even lose your licence.

The second section is a physical examination. This will look at what is known medically as your ‘vital signs’. This means taking your temperature, checking your pulse rate and blood pressure and listening to your respiratory function. The doctor will also perform some physical tests on you to check aspects like vision and sleep disorders.

During the physical examination, whilst general health will be assessed, there are certain areas that require more attention to ensure you meet the standards needed to drive commercial vehicles:

  • Vision – eyesight requirements are stricter for commercial drivers than for those who drive standard passenger cars (B category). You will have your Visual Activity (VA) tested as well as your total field of vision (VF). If you wear glasses or contacts, remember to take them to your HGV medical test. If you have lost vision completely in one eye, you may still be eligible to drive a commercial vehicle, should you pass the eyesight test. VA is measured using the Snellen scale – a chart of capital letters descending in size. Car drivers must have a Snellen VA of 0.5 (6/12) in both eyes – or if you only have one eye – in that eye. HGV drivers must have a Snellen VA of 0.8 (6/75) in their better eye and 0.1 (6/60) in their poorer eye. The VF test evaluates your ability to see movement, shapes and objects beyond your central vision. The VF requirement for HGV drivers must be: at least 160 degrees with an extension of 70 degrees left and right and 30 degrees up and down. By comparison Category B (car drivers) require an AF of 120 degrees with an extension of 50 degrees left and right.

In addition to the eye test, you will also be asked to read a number plate from 20 metres away before your practical driving test (with/without glasses or contact lenses).

  • Heart conditions – anything such as a heart attack, stroke, angina, coronary bypass surgery, pacemaker implant and implantable cardioverter defibrillator will have to be disclosed to the doctor. If your condition is being treated correctly, you’re fine to continue your licence acquisition process. Following heart bypass surgery, depending on the speed of your recovery, you may be able to resume driving in as little as two weeks. The same applies to heart attacks.
  • Neurological conditions The doctor will ask questions about a variety of neurological conditions. They will cover epilepsy, blackouts or memory problems as well as  Parkinson’s Disease, Multiple Sclerosis (MS), Motor Neurone Disease (MND), Stroke,  Transient Ischaemic Attack (TIA) and Narcolepsy (extreme drowsiness). With the exceptions of MS and MND, none of the other conditions listed immediately prevent you from driving. However, it will depend on your individual circumstances, ability to control a vehicle and to what extent medication covers your symptoms.
  • Mental health Mental fitness is just as important as physical fitness when it comes to driving an HGV. The doctor will want to discuss a variety of psychiatric issues you may have confronted.

Conditions you must disclose and may prevent you from acquiring an HGV licence include: severe depression, psychotic disorder, hypomania, mood swings, schizophrenia and dementia.

Mental health conditions that don’t prevent you from acquiring an HGV licence include: ADHD, autism, dyslexia and moderate learning disabilities.

Other mental health illnesses you’ll need to tell the doctor about include obsessive compulsive disorder (OCD) and personality disorder, as these could potentially affect behaviour too.

If you’re taking medication that may impact your driving, you must inform the doctor.

  • Strokes – If your clinical recovery is satisfactory, you may be able to resume driving after one month. However, it’s considered best to consult with your GP before getting behind the wheel again
  • Diabetes – This condition won’t stop you from becoming an HGV driver. However, you must be able to demonstrate that you’re able to manage it. This typically means  recording twice-daily glucose testing, and if you have insulin-treated diabetes, the doctor will ask for glucose readings from the last 3 months. Please see our guide on driving with diabetes for more information.
  • Sleep deprivation – It’s estimated that 25% of fatal accidents are a result of ‘falling asleep at the wheel’. As part of your HGV medical requirements, the doctor will look for signs and symptoms of sleep disorders such as Narcolepsy and Sleep Apnoea.  As long as the sleep disorder can be managed, you should pass the HGV medical examination.
  • Alcohol consumption – during your HGV medical examination the doctor will discuss your alcohol intake. They will need to confirm that your alcohol consumption is unlikely to impact on personal, social and work responsibilities.

The penalties for drink driving are severe: a first offender will be fined, have an automatic ban of at least one year and face up to six months in prison. If someone is killed as a result of drink driving, the driver could face unlimited fines and a 14-year prison sentence.

You can check the full list of medical conditions that could affect your driving.

Does the HGV medical test for drugs?

No. But you will be asked about any history of drug abuse and intake of substances that could impair your ability to drive safely. Remember, employers do random drug testing on their drivers because driving under the influence of drugs is strictly prohibited. With that in mind, drivers caught driving having taken drugs, face a 12-month ban and, depending on the severity of the offence and the circumstances, up to 26 weeks in jail.

Developing Medical Conditions in the Future

Once you acquire your HGV licence, if you should develop a medical condition in the future, you are required by law to report changes in health to the DVLA. This may mean that you need to undergo a new HGV medical examination in order to continue working as an HGV driver.  Depending on your circumstances, passing the medical assessment may result in the restoration of full driving privileges or a switch to a short-term licence. In either situation, you must continue to keep the doctor informed regarding the medical condition in question.

An HGV licence in the following categories is valid for five years:

  • C
  • CE
  • C1
  • C1E
  • D
  • DE
  • D1
  • D1E

If you’d like to talk to us about how we can help kickstart your HGV career, call us on 0808 178 9977 or chat to one of our agents right now.