City of Houston opens 9,000 COVID vaccination appointments for week of April 19 | Register here Getting vaccinated is free and does not require insurance. You do not need to provide proof of residency or citizenship. Author: Doug Delony Updated: 5:39 AM CDT April 19, 2021 HOUSTON — The Houston Health Department is offering approximately 9,000 COVID-19 vaccination appointment slots for people ages 18 an older. This time around it's the Moderna vaccine that is available. The appointments are for first shots. As a reminder, you must register in advance and get a confirmation email or text message in response to verify your appointment location and time. Getting vaccinated is free and does not require insurance.