Billing for pharmacists' services provided to ambulatory care patients.

The author reflects on a study by Maldonado and colleagues on outpatient billing, which highlights information on billing the Centers for Medicare and Medicaid Services (CMS) for patient care services provided by pharmacists. She describes several outpatient billing methods, including incident-to billing and facility or technical fee in a physician-based clinic as well as a hospital-based clinic. Also discussed are the sustainability issues related to pharmacist-provided ambulatory care.