Same-Day Service PSS is the only nationwide medical supply distributor that provides same-day delivery at no additional cost. Our same-day service is guaranteed on 95% of all products ordered and is subject to delivery locations. All offices located within 100 miles of the nearest PSS service center are guaranteed same-day delivery provided the order is placed by 10:30 a.m. Offices located within 30 miles of the nearest center can place orders as late as 12:30 p.m. and still receive same-day service. For more information about our same-day service, please contact your nearest PSS service center.