The person left me a voicemail saying they were with Walgreens pharmacy. I have never gotten a phone call from Walgreens before and have no oustanding orders, prescriptions or payments. I have reported the discrepancies to Walgreen's and am waiting a response. I believe it is illegal to use an invalid phone number (as they have done). I have raised this concern with them as well.

I have just started receiving calls from this # but when I call the # back it does not accept incoming calls.  Any ideas how to determine who this is???

It's really Walgreens. It's not the brick and mortar Walgreens stores tho. It's a branch of the pharmacy that sends out orders for special medications like what people who have Multiple Sclerosis might take.

If they're calling you and you dont know what for, it's probably an honest mistake.

This is the Walgreens Mail Service.  It is a Walgreens Pharmacy that sends out prescriptions through the mail.  However the only reason they should be calling you is if you placed a mail order with them.  They sell the same medications as any Walgreens Pharmacy would.

It is possible that they are dialing the wrong number if you did not place an order with them.  Their callback number is 1-866-406-4198.  Their website is www.walgreensmail.com.  

I hope this helps.