No Activation Code? Sign up online. For help with Social Security Number or Date of Birth entries, please contact your physician's office. For all other technical inquiries, please contact the MyChart Technical Support Team at 1-833-AHN-CHRT (1-833-246-2478) (Monday-Friday 7:00am to 5:00pm and Saturday from 7:00am to 3:00pm), or send an email ....