Our online patient portal - My MDC Chart - allows you to communicate with us easily and safely - according to your schedule. Using your own secure password, you can log into the Patient Portal 24 hours a day, 7 days a week from the comfort and privacy of your home or office. ... Mid Dakota Clinic PO Box 5538 Bismarck, ND 58506-5538For Patients‧Fees, Billing, and Insurance‧About Your Visit‧Covid-19 Information‧Patient Forms‧Find a Doctor.