Are hospitals allowed to sell my phone number to advertisers?

(written by lawrence krubner, however indented passages are often quotes). You can contact lawrence at:

My mom was recently in the hospital. I gave the hospital my cell phone number, as the official point of contact between the hospital and the family. Suddenly I’m getting spam robots calling my cell phone, with messages about how I can get low cost health insurance. Someone sold my number. Maybe it was the hospital or maybe it was a related 3rd party, but someone sold my number. I am very irritated about this.