It is not an 800 number nor is it "shady" as many have you commented. They are calling because you took blood work in which you need to call a special number for the results. You should have been notified by your doctor that you would get a phone call informing you the results are in. When this number calls, you know you can call the result line.
I got 3 phone calls from the 480-421-9723 yesterday within 2 minutes around 3pm. No voicemail was left, but I don't answer unknown numbers. I figured if it was urgent they'd leave a message. Then this morning around 8:40am, the same number called, but only once. Still no voicemail was left.
I bit the bullet and decided to call the number back. Apparently its a message service that calls to remind of health care appointments or information from your health care provider, like feedback on a recent appointment.
I didn't answer, but called the number back. It was from MedVoice, a company that is supposed to remind you of an upcoming healthcare appointment or to let you know your healthcare provider has left a confidential message for you on their server. Supposedly, if they keep calling back, it's to let you know there is a message waiting for you.
I did some research after countless annoying calls over the span of a few months. First I did a look up for the phone number, which initally helped me when calling various doctors in my area code with the same last name. I would mention the call and what happened, and they would say they didn't have a service like that. Then I found the right doctors office who appologized and said I needed the patients last name to have it changed. Well since the name was soo badly stated in the message every single friggin time I could not do that. They said they would keepo my info and correct it when they found it...bull I thought. So I did some more digging and found who pays the bill for that phone number and found on of their offices in Scottsdale. I thne was able to explain what happened and they were abelt to remove from their database. However I am reluctant to consider this take care of as I think the next time that stupid patient or admin at the Dr's office gives my number again, this cycle will start all over again. So without further-a-do here is the number to call to get your number removed...