After the insurance carrier makes a decision on a claim and the practice receives and posts the payment, the patient's balance must be calculated. The claim case studies in this section provide practice in calculating balances by providing the latest payment information obtained from RAs for each patient in Chapter 15, Claim Cases 15.1 through 15.20. Based on the payment information from the RA, you must calculate each patient's balance. All answer amounts should have dollars and cents, i.e. 0.00,13.00,13.50,13.42, etc. Case Study 16.6 Patient: Walter Williams The practice receives the following information on an RA from Aetna Choice. The patient made a $15 copay at the time of the visit. POS11PROC36415BILLED17.00ALLOWED16.00DEDUCT0.00COINS/COPAY15.00PROVPD1.00