In situations such as arranging an appointment with a doctor, keeping the appointment, answering questions with regard to the history and submitting without objection to physical examination, consent is clearly implied.

The patient entering the consultation office of a doctor by his own free will may be considered to have provided consent for a diagnosis to be carried out. Consent may be inferred from the patients submission to orders given by a doctor during clinical diagnosis (Indian J Urol 2009;25(3):343-7). 

For instance, when a patient comes to a cardiology clinic, his consent for chest auscultation is implied.