South Windsor 2701 Tamarack Ave South Windsor, CT 06074 Phone: (860) 647-8282 Send Us A Message LocationSouth Windsor OfficeTolland OfficeDoctorJohn Walker, MDOlga Bulygina, MDSreenivas Gunturu, MDLori Bryon, PABrittany MolkenthinScott O'Brien, PA-CTristin Geist, APRNNikisha Hamal, MSN, FNP-CFrederic Bernstein, DO, FACC, FSCAIName* Email* Phone*Message*Please use this form for general information purposes only. DO NOT send personal health information through this form. Specific patient care must be addressed during your appointment.PhoneThis field is for validation purposes and should be left unchanged. Our Location