Winter Haven Hospital patients can view records for BayCare visits that occurred on or after June 1, 2015. Bartow Regional Medical Center patients can view records for BayCare visits that occurred on or before June 1, 2016. For additional assistance with the BayCare patient portal, please call (888) 499-9003.For Patients‧Pay My Bill‧Mybaycare Patient Portal FAQS‧Contact Us‧Find Doctors.