I too have been getting calls, they will leave a message. but I too owe a anesthesia bill so that must be them. don't do any good to answer the call when I can't affor to pay the bill yet.

I have been getting calls from this number. They did leave a mesage to call them but not who they are.  It must be a bill collector as I do owe some medical bills

this one calls almost every day, we don't answer 800 calls and they don't leave a message, this started about three weeks ago.

Multiple harrassing calls at my work number despite proper notification by registered mail.

This # has been calling, with an unusual format showing up - instead of (800) 275-2152 (which is normal), the number displays as +800 2752152. The plus sign and the lack of formatting tells me this call is international.

I have no outstanding debts, and am wondering if it's the same company. Likely is, since they are calling ~4 times a day, the pattern described above.

I haven't been answering the calls since I don't answer numbers I don't recognize (I figure if it's important they'll leave a voicemail and then I can decide whether or not to call them back).

Anyway, once I saw the anesthesia comment above I checked the bill I have here for my surgery anesthesia, and sure enough, the number matches.

I notice my bill is dated 2/28, and says "Due upon receipt", which I hadn't noticed before. But you'd think they'd at least wait 30 days to start calling.

My phone had been registered on "Do Not Call" program on November 2009. However, I got four calls every day from 800-275-2152.

I had no such service