Hours of Operation Mon 10:00 a.m. –  2:00 p.m. Tues, Wed, Thurs, Fri: 8:00 am – 6:00 pm Sat: 8:30 am – 4:00 pm 1-800-258-4674 Services: 1.5T MRI, Arthrograms MRI Tax ID: 02-0501695   Address: Shields MRI Portsmouth 1900 Lafayette Rd. Portsmouth, NH 03801 Get directions from Go Unable to find any directions.