I do billing for a chiropractor's office and have a situation. A patient was seen back in March of this year for a worker's comp accident. However, on 5/27/07, she was involved in a MVA and has a new set of injuries. We billed out a 99203 to the auto insurance on 6/1/07 and the patient is no longer being treated under the w/c accident. The auto insurance is stating that the are aware the patient was seen before for a different accident and will not pay for a new office visit. I was under the impression that if it is a new accident and new injury that it would warrant a 99203 because you would need to have an initial report done for that accident. Or is this wrong? Please help!! Thank you!