"Doctors who discover that a person with whom they are developing a personal or sexual relationship is also their patient should immediately cease the relationship or take reasonable steps to ensure that medical care is provided by another practitioner.
The guidance comes after a number of high-profile cases in which doctors and other health-care staff have sexually abused patients, such as that of the psychiatrists Dr William Kerr and Michael Haslam, both of whom abused vulnerable patients in Yorkshire.
Separate documents have been produced by the CHRE for patients and employers.
The General Medical Council published a Code of Conduct for doctors last year and said they had been working with the CHRE to ensure all the guidance was consistent.
The proposals, the first of their kind, are expected to go before ministers in June, reported Nursing Standard.