Thank you for choosing UC San Diego Health for your medical care. We're here to help. For billing questions, you can: Call 855-827-3633, 9 a.m. to 6 p.m. weekdays Email us at askus@ucsd.edu (include the patient's guarantor/account number, medical record number, or telephone number so we can locate their account) Visit Frequently Asked Questions for information about facility fees, insurance ....