Welcome to the Texas Center for Infectious Disease information page for patients, their families, and the community. Advance directives are legal documents that allow you to convey your decisions about end-of-life care ahead of time.The signature of a minor patient is required for the release of some of these items. Complete new patient forms in advance. Please select and print from the options below, fill them out completely and bring them with you to your appointment. Texas hospitals must ask patients starting Friday whether they are in the US legally and track the cost of treating people without legal status. At Texas Behavioral Health Systems, we offer our forms fully online so you can fill them out in the comfort of your own home or office. Patient Registration (PDF) - All patients should fill out this form to register with us. Patient Registration (PDF) - All patients should fill out this form to register with us. There is not a fee to apply for the Harris Health Financial Assistance Program.