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What is Assignment of Benefits in Medical Billing

The health care industry has a wide network of health care insurance payers that make payments on behalf of patients having insurance plans. Without insurance plans, many patients would not be able to seek medical services. Whenever a patient visits a doctor for the treatment he/she needs to ensure that the insurance payer makes the payment for all the medical benefits he/she may have received. This is where the assignment of benefits comes in.

Definition of Assignment of Benefits

The term assignment of benefits (AOB) may be referred to as an agreement that transfers the health insurance claims benefits of the policy from the patient to the health care provider. This agreement is signed by the patient as a request to pay the designated amount to the health care provider for the health benefits he/she may have received. On the patient’s request the insurance payer makes the payment to the hospital/doctor.

Understanding of Assignment of Benefits

The assignment of benefits is generally transferred by designing a legal document— for which, the format  may vary across medical offices. This document is called the ‘Assignment of Benefits’ form. While signing the form, the patient also authorizes the insurance company to release any and all written information that is required by the hospital for reimbursement purposes. This also means that any medical billing and collection company hired by the hospital is free to use the released information for billing purposes. In addition to this, the patient agrees to appoint anyone from the hospital as a representative on his/her behalf to seek payment from the insurance payer. In other words, once the document has been signed, the patient is no longer required to deal directly with the insurance company or its representative, unless asked to do so.

It is important to note that the assignment of benefits occurs only when a claim has been successfully processed with the insurance company/payer. However, the insurance company may not always honor and accept the request for AOB. The acceptance or rejection of AOB depends on the patient’s or member’s health benefits contract and/or the State Law. Therefore all three parties— patient, health care provider, and the insurance company must stay updated with the State Law and also, review the patient’s health benefit plan thoroughly. This will help in saving time and unnecessary paperwork if the chances of the insurance company rejecting the AOB seem to be high.

Following are some providers or medical services that use AOB:

  • Ambulance services.
  • Ambulatory surgical center services.
  • Clinical diagnostic laboratory services.
  • Biological(s) and drugs.
  • Home dialysis equipment and supplies.
  • Physician services for patients having Medicare and Medicaid plans.
  • Services of medical professionals other than a primary physician, including certified registered nurse anesthetists, clinical nurse specialists, clinical psychologists, clinical social workers, nurse midwives, nurse practitioners, and physician assistants.
  • Simplified billing roster for vaccines, such as— influenza virus and pneumococcal.

AOB plays an important role in medical billing by establishing direct contact with the patient’s health care insurance payer. The purpose is to increase the chances of reimbursement and accelerate the process without contacting the patient additionally..


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