Mariana Day, FNP-NP Family Nurse Practitioner Languages spoken English Education and Credentials Board Certification Family Nurse Practitioner, 2021 Where I Provide Care Primary Office St. Mary's Regional Medical Center 93 Campus Ave. Lewiston, ME 04240-6030 Phone: 207-777-8700 Directions to St. Mary's Regional Medical Center Location Details for St. Mary's Regional Medical Center