When medical coders record information about outpatient services, they use the hcpcs, which stands for

Healthcare Common Procedure Coding System

Explanation:

Medical coders record information about outpatient services by using this system. This is a medical billing process employed by both Medicare and Medicaid Services.  This system was established in 1978 in an attempt to standarize the recording and delivery of medical practices. It also enables such services to process information in an orderly and consistent manner.

answer; (b) medicare fee schedule;