Medical Definition of coder
: a person who assigns codes to something (such as documentation of a medical diagnosis or procedure) by using a classification system Medical coders are responsible for assigning codes to diagnoses and procedures to ensure proper financial reimbursement from insurance companies and government agencies.—The Boston Globe, 14 Apr. 2005
Seen and Heard
What made you want to look up coder? Please tell us where you read or heard it (including the quote, if possible).