Date First Seen is an ACTIVITY DATE TIME.

Date First Seen is the date that the PATIENT is first seen in the Trust that receives the first referral.

Date First Seen will be one of the following, whichever is the earliest SERVICE relating to the REFERRAL REQUEST:

• first Out-Patient Appointment; this is the Attendance Date of the first Out-Patient Attendance Consultant
• first diagnostic procedure if this precedes the first Out-Patient Appointment; this is the first Clinical Intervention Date of the Imaging or Radiodiagnostic Event or CLINICAL INTERVENTION
• first seen as an emergency; this is the Start Date of the Hospital Provider Spell or the Arrival Date At Accident and Emergency Department of the Accident and Emergency Attendance
• the date the PATIENT was first seen following referral (or recall) from (or by) a Screening Unit.