Weegy: Health care providers are paid for services based on numeric and alphanumeric codes assigned to a patient’s diagnoses and procedures. These codes are then billed to insurance companies for reimbursement. [ The accuracy and adequacy of coding and documentation greatly affects medical billing. Coding and documentation helps to prove the medical necessity of treatment. Supportive documentation explains what services were provided, so the appropriate codes can be assigned to explain why treatment was needed. ] (More)