Talk to the patient's health care provider to receive a ChristianaCare invitation. Self-enrollment is not currently available to caregivers or guardians. Learn about Proxy Access. Unable to self-enroll? Please call 302-320-6852 and select option 1, Monday thru Friday, 8 a.m. - 4:30 p.m. or e-mail MyHealth@ChristianaCare.org *.