Hours: Monday-Friday, noon-8 pm. Location: Doctors Ambulatory Surgery Center, North Building, first floor Walk-in and appointments available here. Phone: 301-552-8693. LHAAMC. Hours: Monday-Friday, noon-8 pm. Location: Sajak Pavilion, Suite 170 Walk-in and appointments available here. Phone: 443-481-1966.Login Page‧Sign up Now‧Password Reset‧Forgot Username‧MyChart‧Signup.