i need help with this.. can someone help?

Read the following case study and, then, answer the questions below. Each question should be answered in at least one paragraph .

Lewis Jordan, RMA, works at Pearson Physicians Group as a medical billing and insurance clerk. His duties include verifying insurance and processing claims.

Sylvia Baker is a new patient and has an appointment to see Dr. Miller next week. She has Blue Cross/Blue Shield insurance. Mark Flannery is also a patient. He was in to see Dr. Miller last month, and the claim for his care was rejected. The codes, quantities, and modifiers were all correct on the CMS-1500. Lewis receives a call from Mr. Flannery, who is angry, because he has been billed for his last visit and has already paid his co-payment.

Questions:

• What steps should Lewis take to verify Sylvia Baker's insurance?
• List some reasons the claim for Mark's care could have been rejected.
• How should Lewis handle Mr. Flannery's angry call?