Possible Clues:

• Bldg. that's not well-attended?
• I.C.U. locale
• Place to see 16 Down: abbr.
• Doctor's place: Abbr.
• ER or OR site
• O.R. or E.R. site
• Reason for a quiet zone: Abbr
• ''M*A*S*H'' setting: Abbr
• Medical center (Abbr.)
• Drip locale: Abbr