Maine Primary Care Providers St. Mary's Lewiston, Maine. Health (5 days ago) Our Family and Internal Medicine practices (primary care providers) are located in central Maine.Auburn Medical Associates (family practice) 2 Great Falls Plaza, Second Floor, Auburn, Maine 04210 207-330-3950 Fax: 207-330-3955. B Street Health Center (family practice) 57 Birch Street, Lewiston, ME 04240 207-753-5400 ....