Medical billing is the process of submitting and following up on claims with health insurance companies in order to receive payment for services rendered by a healthcare provider. The same process is used for most insurance companies, whether they are private companies or government sponsored programs. Medical billers are encouraged, but not required by law, to become certified by taking an exam such as the CMRS Exam, RHIA Exam and others. Certification schools are intended to provide a theoretical grounding for students entering the medical billing field.
The medical billing process is an interaction between a health care provider and the insurance company (payer). The entirety of this interaction is known as the billing cycle sometimes referred to as Revenue Cycle Management. This can take anywhere from several days to several months to complete, and require several interactions before a resolution is reached. The relationship between a health care provider and insurance company is that of a vendor to a subcontractor. Health care providers are contracted with insurance companies to provide health care services. The interaction begins with the office visit: a physician or their staff will typically create or update the patient's medical record.
After the doctor sees the patient, the diagnosis and procedure codes are assigned. These codes assist the insurance company in determining coverage and medical necessity of the services. Once the procedure and diagnosis codes are determined, the medical biller will transmit the claim to the insurance company (payer). This is usually done electronically by formatting the claim as an ANSI 837 file and using Electronic Data Interchange to submit the claim file to the payer directly or via a clearinghouse. Historically, claims were submitted using a paper form; in the case of professional (non-hospital) services aCenters for Medicare and Medicaid Services]]. At time of writing, about 30% of medical claims get sent to payers using paper forms which are either manually entered or entered using automated recognition or OCR software.
The insurance company (payer) processes the claims usually by medical claims examiners or medical claims adjusters. For higher dollar amount claims, the insurance company has medical directors review the claims and evaluate their validity for payment using rubrics (procedure) for patient eligibility, provider credentials, and medical necessity. Approved claims are reimbursed for a certain percentage of the billed services. These rates are pre-negotiated between the health care provider and the insurance company. Failed claims are denied or rejected and notice is sent to provider. Most commonly, denied or rejected claims are returned to providers in the form of Explanation of Benefits (EOB) or Electronic Remittance Advice.
Upon receiving the denial message the provider must decipher the message, reconcile it with the original claim, make required corrections and resubmit the claim. This exchange of claims and denials may be repeated multiple times until a claim is paid in full, or the provider relents and accepts an incomplete reimbursement.
There is a difference between a “denied” and a “rejected” claim, although the terms are commonly interchanged. A denied claim refers to a claim that has been processed and the insurer has found it to be not payable. Denied claims can usually be corrected and/or appealed for reconsideration. A rejected claim refers to a claim that has not been processed by the insurer due to a fatal error in the information provided. Common causes for a claim to reject include when personal information is inaccurate (i.e.: name and identification number do not match) or errors in information provided (i.e.: truncated procedure code, invalid diagnosis codes, etc.) A rejected claim has not been processed so it cannot be appealed. Instead, rejected claims need to be researched, corrected and resubmitted.
For several decades, medical billing was done almost entirely on paper. However, with the advent of medical practice management software, also known as health information systems, it has become possible to efficiently manage large amounts of claims. Many software companies have arisen to provide medical billing software to this particularly lucrative segment of the market. Several companies also offer full portal solutions through their own web-interfaces, which negates the cost of individually licensed software packages. Due to the rapidly changing requirements by U.S. health insurance companies, several aspects of medical billing and medical office management have created the necessity for specialized training. Medical office personnel may obtain certification through various institutions who may provide a variety of specialized education and in some cases award a certification credential to reflect professional status. The Certified Medical Reimbursement Specialist (CMRS) accreditation by the American Medical Billing Association is one of the most recognized of specialized certification for medical billing professionals.
In many cases, particularly as a practice grows beyond its initial capacity to cope with its own paperwork, providers outsource their medical billing process to a third party known as a medical billing service. These billing services typically take a percentage of a practice's revenues as payment.
One goal of these entities is to reduce the burden of paperwork for medical staff and to recoup lost efficiencies caused by workload saturation, paving the way for further practice growth. Practices have achieved significant cost savings through Group purchasing organizations (GPO), improving their bottom line by 5% to 10%.[2]
Medical billing regulations also tend to be complex and often change. Keeping staff and billing systems up to date with the latest billing rules can become a distraction for health care providers and administrators. Another primary objective for a medical billing service is therefore to use its billing expertise and to focus on maximizing insurances payments by properly processing the provider's claims. They are solely responsible for taking codes from the coders and preparing accurate bills that are further forwarded to the insurance company. It is the task of a medical billing professional to complete the billing process in a manner that it will avoid denials from the insurance companies.
Additionally, the recent trend in this field towards outsourcing, has shown a potential to reduce costs. In addition, many companies are looking to offer EMR, EHR and RCM to help increase customer satisfaction, however as an industry the CSAT levels are still extremely low.