HGV Driver Medical Requirements: Group 2 Licence, D4 Medical, and What Changes with Age
HGV driving requires a higher medical standard than a standard car licence. Drivers operating goods vehicles over 3.5 tonnes hold a Group 2 licence (categories C, C1, CE, or C1E), which requires a formal medical examination — the D4 — at set intervals throughout the driver's career. As drivers age, those intervals shorten.
For operators, this creates an ongoing tracking obligation: you need to know when each driver's medical expires and ensure they don't drive past that point.
General guidance, not legal advice. Medical requirements for HGV drivers are set by DVLA and are subject to change. Always verify current medical standards and frequency requirements against the latest DVLA guidance before making decisions about driver fitness.
Why Group 2 Drivers Face Higher Medical Standards
The Group 2 standard exists because the consequences of a driver becoming medically unfit at the wheel of a large goods vehicle are more severe than for a standard car. DVLA sets higher thresholds for conditions including heart disease, diabetes, epilepsy, vision, and hearing for Group 2 drivers.
The standard is assessed by DVLA based on evidence from the driver's GP and, where the D4 form requires it, a specialist. It's not a simple GP sign-off — the DVLA medical standards for Group 2 are the benchmark, and individual GPs are providing evidence for DVLA to assess against those standards, not making the licensing decision themselves.
What the D4 Medical Involves
The D4 (Medical Examination Report for the Licensing of Vocational Drivers) is the form used to record the medical examination. A registered medical practitioner — typically the driver's GP, an occupational health doctor, or a doctor specifically providing DVLA medical reports — completes the form.
The examination typically covers:
- Visual acuity and field of vision — Group 2 standards are stricter than Group 1; both unaided and corrected vision are assessed
- Cardiovascular system — blood pressure, heart rate, any history of cardiac events
- Neurological conditions — any history of epilepsy, TIA, stroke, or conditions affecting consciousness
- Diabetes — insulin-treated diabetes has specific rules for Group 2 licences
- Hearing — ability to hear a normal conversation
- Mental health — relevant conditions affecting fitness to drive
- Sleep conditions — obstructive sleep apnoea, in particular, is a common finding with significant implications for Group 2 licences
The completed D4 is submitted to DVLA as part of the licence application or renewal. DVLA makes the licensing decision based on the evidence — the examining doctor provides the factual medical information, not a fitness-to-drive verdict.
How Often HGV Drivers Need a Medical
Initial application: A D4 medical is required when first applying for a C or C1 (or CE/C1E) licence entitlement.
From age 45: Drivers must renew their medical every 5 years to maintain HGV entitlement.
From age 65: Drivers must renew their medical every year to maintain HGV entitlement.
These intervals reflect the increasing medical risk profile with age. The transition points are hard thresholds — a driver who passes their 65th birthday must have an annual medical on the anniversary of their licence, not at a convenient later date.
Individual licences may have shorter renewal intervals imposed by DVLA based on a specific medical condition — for example, a driver with controlled diabetes may have a 1-year or 3-year renewal interval rather than the standard 5 years.
The Operator's Responsibility
DVLA manages the licensing side — issuing, renewing, and revoking driver licences based on medical evidence. But the operator carries a separate responsibility: ensuring the drivers you employ or use hold a valid licence entitlement at the time they're driving for your operation.
An operator who allows a driver to continue driving after their medical entitlement has lapsed — even if they don't know the licence has expired — may face serious consequences. DVSA can take action against operators for failing to check and track driver licence entitlement.
This means:
1. Verify entitlement at employment: Before a driver operates any vehicle for you, check their driving licence entitlement. For HGV drivers, this means confirming the Category C (or C1, CE, C1E) entitlement is present on their licence. DVLA's online checking service allows you to check with the driver's consent.
2. Track renewal dates: If you employ drivers aged 45 or over, you need a system to track their medical renewal dates. A driver who turns 65 needs an annual renewal — if that renewal lapses mid-employment, they're driving without valid entitlement on the next day.
3. Re-check periodically: A driver's licence can change status — DVLA can revoke entitlement following a medical notification or report. Annual or bi-annual licence checks for employed drivers are good practice.
The O-licence compliance checklist includes driver licence verification as a standard compliance item. If you use fleet compliance software, check whether it tracks driver entitlement renewal dates alongside vehicle compliance deadlines. See our fleet compliance software guide for what to look for.
Medical Conditions That Require Notification
Drivers are required to notify DVLA if they develop a medical condition that may affect their fitness to drive. For Group 2 drivers, the notifiable conditions include but are not limited to:
- Epilepsy or seizures
- Cardiac events (heart attack, angina, arrhythmia requiring treatment)
- Stroke or TIA
- Insulin-treated diabetes
- Sleep disorders with excessive daytime sleepiness
- Vision loss or deterioration
- Certain mental health conditions
The driver has the primary notification obligation. But if an operator becomes aware that a driver has developed a condition that would affect their Group 2 entitlement, and continues to employ them without verifying their entitlement is still valid, the operator is taking a significant risk.
This isn't about monitoring your drivers' personal health — it's about not ignoring obvious signals that a driver may no longer hold valid entitlement. If a driver tells you they've had a health event that required hospital treatment, the appropriate response is to verify their entitlement before the next drive, not to assume it's fine.
Driver CPC and Medical Fitness Are Separate
Driver CPC (Certificate of Professional Competence) is a separate requirement from medical fitness. CPC is about professional training — the 35 hours of periodic training every 5 years. Medical fitness is about physical and mental fitness to hold the licence.
Both must be current for a driver to operate commercially. Check both independently — a driver with a current medical but lapsed CPC is not compliant, and vice versa.
See our transport manager responsibilities guide for the full scope of driver compliance obligations that fall within the transport manager's brief.
Finding a D4 Medical Provider
D4 medicals can be arranged through:
- The driver's own GP (some GPs do them; some refer out)
- Occupational health providers with DVLA medical experience
- Specialist driver medical clinics
As of 2026, costs vary widely — typically between £50 and £150 depending on provider. Drivers typically pay this themselves (it's a personal licensing cost), but some operators cover it as a staff benefit to ensure the renewal doesn't slip. Whatever your arrangement, the responsibility for keeping the entitlement current ultimately rests with the driver.