Nevada Health Centers’ (NVHC) Mammovan will be offering mammography screenings in northern Nevada from February 28 through March 8. The screenings will be offered at the following locations and times:. DateHoursLocation. Friday, March 17:40 a.m. – 3:20 p.m. Northern Nevada HOPES. 580 W. 5th St. Reno. Monday, March 47:40 a.m….