Mrs. lawrence is an elderly diabetic pt who is on medicare. she recently injured her lower left leg, and since then has had trouble w/open sores or ulcers on that leg. she came to the office last week to have the physician examine and treat the ulcers. at that time, you checked, and she qualified for medicaid as well as medicare. she has come to the office today for f/u care & treatment. which of the following should you do first ?
a) bill medicare for the services
b) obtain preauthorization for treatment
c) verify mrs. lawrence's eligibility for medicaid
d) refer mrs. lawrence to a specialist