Sentence:  others may be getting their first medication through the new Doorway program at Lakes Region General Hospital, which works with <WSD>walk-ins</WSD> as well as people referred by the state's 2-1-1 health services crisis line. 
Meaning of the word marked with <WSD> tags:  A customer, job applicant or similar who visits a restaurant, medical facility, car dealership, etc. without a reservation, appointment, or referral.