Recovery audit contractors, whose purpose is to recover improper Medicare funds, were instituted under which act of Congress?

Which of the following devices could cause CO2 retention? 1. Simple mask 2. Aerosol face mask 3. Nonrebreathing mask 4. Air-entrainment mask

a. 1 and 3 c. 2 and 3 b. 1 and 2 d. 3 and 4

An audit done by a practice before submitting a claim to an insurance company would be referred to as a(n) ________ audit.

Fill in the blank(s) with the appropriate word(s).