Become a Medical Billing and Coding Specialist Today | American College of Healthcare Medical coders are essential to medical record keeping. Medical coders assign alphanumeric codes to specific injuries, illnesses and medical procedures, using a system of medical coding consistent across the health care system. Doctors and hospitals use the codes for planning and internal data collection, while public agencies and insurance companies require codes to reimburse health care providers. in Public bookmarkswith colleges_in_huntington_park_californiahealthcare_college_of_californiamedical_and_billing_coding_schoolsmedical_billing_and_coding_specialist Note: Medical coders are essential to medical record keeping. Medical coders assign alphanumeric codes to specific injuries, illnesses and medical procedures, using a system of medical coding consistent across the health care system. Doctors and hospitals use the codes for planning and internal data colle ...morection, while public agencies and insurance companies require codes to reimburse health care providers.