The Defence Medical Services (DMS) comprises personnel from the Royal Navy Medical Service, Army Medical Service, the Royal Air Force Medical Service and the Headquarters Defence Medical Services (HQ DMS).

DMS promotes, protects and restores the health of the UK armed forces to ensure that they are ready and medically fit to deploy globally. The DMS is staffed by circa 11,500 service personnel (8,000 regular and 3,500 reserves) and 2,600 civilian personnel and provides healthcare to circa 143,500 UK Regular Armed Forces personnel.

Service personnel and civilians work side by side as medical, dental and allied healthcare professionals with other personnel to plan and deliver excellent healthcare services wherever they are needed. The services offered by the DMS include primary healthcare, dental care, rehabilitation, occupational medicine, community mental healthcare and specialist medical care.