Doctor's Mistake While Operating On A Patient
If the patient was not harmed then there is no need to contact the patient. Only asking forgiveness from Allah would suffice and doing charity is also good. However, if the patient was harmed because of an intentional mistake ( not intended to harm the patient ) but the mistake was something which a doctor should have avoided but did not becasue of a mistake at his end, then there is a sharia in place to deal with such situation which is shared in the above thread.