I called my insurance company on Friday to ask about the status of my approval. They told me I was approved, but my surgeons office told me that they need to see it on paper. Which I totally understand. If they mailed it on Friday, today is Wednesday...when will I get the letter?!?!?!

Yup they sure do need it in writing. You can ask your insurance company to fax/email it to you. Then you can forward it to your surgeon.