Terms of AT&T Healthcare alerts: By entering the information above, you are providing your signature and agreeing to receive mobile marketing text messages from AT&T. Depending on the terms of your wireless plan, your carrier may charge for receiving these promotional text messages. Mobile carriers supported are AT&T Wireless, Alltel, Boost Mobile, Cellular One, Dobson, Nextel / Sprint, T-Mobile, U.S. Cellular, and Verizon Wireless. Messages will be sent on an average of once a month. The mobile numbers subscribers opt-in with are used only for receiving AT&T Healthcare alerts and will not be shared with any other companies representing goods or services. You may "opt out" of receiving future AT&T Healthcare alerts at anytime by texting 20964 with the word STOP.