Care UK provides healthcare and residential care. The company’s services include treatment centres, GP practices, walk-in centres, out-of-hours GP support and diagnostics facilities. Care UK also provides healthcare at a number of prisons, and runs 110 care homes across the UK.

Care UK bought Harmoni in November 2012, which provides out of hours GP care, 111 telephone services, offender healthcare, urgent care and IT services. 

In early 2017, Care UK reported that it is the largest provider of health care services in prisons and secure facilities. It also provides over 60 NHS primary care services, including GP and walk-in services, 11 NHS out of hours services, and 13 NHS '111' services.