Patient Portal MyChart Overlake Medical Center & Clinics. Health (3 days ago) We are grateful that you are a patient of Overlake Medical Center & Clinics, and would like to help you take a more active role in your healthcare. If you any questions about how to use MyChart, please call (844) 750-8525 or email [email protected]overlakehospital.org.You will need Internet access and a personal ....