Regular Hours:Screening mammograms are offered at OSS every Monday, Tuesday and Friday from 8:00 a.m. to 4:30 p.m., Wednesdays 1:00 – 4:30 p.m. and Thursdays 8:00 - 11:30 a.m. As a convenience to patients, screening mammograms are also available on the last Monday of every month from 9:30 a.m. – 6:00 p.m. For appointments, call 1-800-BASSETT or 607-433-6300.