Source:http://linkedlifedata.com/resource/umls/id/C1512346
NCI: A clinical encounter that encompasses planned and unplanned trial interventions, procedures and assessments that may be performed on a subject. A visit has a start and an end, each described with a rule. NOTE: For many domains each visit results in one record per visit. [SDTM, Trial Design Model],NCI: A visit by a patient or study participant to a medical professional.,HL7V3.0: <p>An interaction between a patient and healthcare participant(s) for the purpose of providing patient service(s) or assessing the health status of a patient. For example, outpatient visit to multiple departments, home health support (including physical therapy), inpatient hospital stay, emergency room visit, field visit (e.g., traffic accident), office visit, occupational therapy, telephone call.</p>