The Princess Grace Hospital is a private hospital in Marylebone, London, and is part of the international division of HCA (Hospital Corporation of America), which is the world's largest private healthcare company.

[2] The intensive care unit was opened by Princess Caroline in 1983, and the hospital was acquired by Hospital Corporation of America in 1996.

[2] The hospital has introduced many new technologies[3] such as Modic Antibiotic Spinal Therapy, which is used to treat chronic low back pain caused by a bacterial infection in the spinal discs,[4] "Nanoknife", which destroys soft tissue tumours with an electric current,[5] the da Vinci robotic surgical system, which facilitates complex surgery,[6] "SmartPill", which is an ingestible capsule that detects changes in pressure, pH and temperature as it travels through the gastro-intestinal (GI) tract,[7] and vacuum assisted breast biopsy, which is when a hollow probe is guided into the abnormal breast tissue and a biopsy is pulled into the probe and cut off.

[8] In recent years, the hospital has grown from its main base on Nottingham Place, a few blocks west of Harley Street.

The hospital has worked in partnership with the NHS and other stakeholders to develop the Institute of Sport Exercise and Health.