Merrimack Family Medicine Patient Portal. Access your Merrimack Family Medicine medical information or contact your physician online. Circle Health Patient Portal. Access your Lowell General Hospital medical information. Phone: (978) 851-4141 ~ 600 Clark Road, Suite 3, Tewksbury, MA 01876Our Providers‧Patient Resources/FAQs‧Services & Procedures‧Contact Us‧Insurances & Billing Policies‧Prescriptions.