Medical billing is the process in which medical providers are paid for performing procedures. The procedures are coded using the most current CPT and ICD-10 codes. The codes are then sent to the insurance companies on the proper HCFA 1500 forms for review and payment. It is the responsibility of the medical biller and coder to make sure the claim is coded correctly, submitted in a timely manner and paid to the physician. Reducing spend is the primary reason that medical practices elect to outsource their medical billing to a third-party provider.