Valley Medical Amherst Ma Patient Portal. Health (3 days ago) Valley Medical Easthampton Portal.Health (6 days ago) Valley medical amherst ma patient portal.Health (2 days ago) Valley Medical Group Primary Care. 31 Hall Drive Amherst, MA 01002 Phone (877) 431-2119 Fax 1-866-644-0871 Office Hours: Monday-Friday, 8am-6pm Saturday Urgent Care, 10am-1pm Full service laboratory on site..