The Cambridgeshire and Peterborough Clinical Commissioning Group have warned patients about bogus phone calls asking for health information.
A spokesman for the group said: “Some patients have been contacted in recent weeks by companies asking people about their health conditions and asking to make an appointment in their home.
“Patients and the public should be extra vigilant when receiving unsolicited telephone calls, or contact of any sort from persons or companies they are unfamiliar with.
“Requests for personal information should be treated with extreme caution and not supplied to the caller, even if they claim to know the details already.
“No NHS organisation would ever cold call a patient to seek medical information. All NHS patient records are held in strict accordance with the Data Protection Act and would never be shared with anyone without patient consent. So, we are warning everyone to be extra vigilant should they receive a call that is claiming to be about their health.”