General Medical Council (2013) Good medical practice London, GMC.
Anyone a doctor works with, whether or not they are also doctors.
You must also follow our guidance on raising and acting on concerns about patient safety. General Medical Council (2012) Raising and acting on concerns about patient safety London, GMC.
You must also follow our guidance on confidentiality (paragraphs 63 - 70 on disclosures for the protection of patients and others). General Medical Council (2017) Confidentiality: good practice in handling patient information London, GMC.
See paragraph 14 of Confidentiality guidance for examples of when this might not be the case.