Please choose the correct ending to complete the given sentence: Health: [header] How to report medical billing fraud [title] Contact the hospital's billing department. [step] In case the doctor or hospital made an honest mistake, it's best to bring the billing error to their attention as soon as you notice the problem. Look on the office's or hospital's website to find information regarding billing disputes.

Ending1: [substeps] Make sure you receive the status of the complaint promptly so the doctor or hospital can get a better handle on the issue. Call the hospital to ask for additional information or to report the problem to the patient's doctor. Ending2: [substeps] If the billing department doesn't have contact information listed, call the office's main number and ask to talk to someone in charge of billing disputes. [title] Request the cfo's contact information. Ending3: [substeps] Go online to experian's billing website, and then visit your local phone number at https: // www.irs.gov/billing-dispute-resolution /. Enter the address you want to speak to. Ending4: The site or the person reading it can help you decide how to handle the problem. [substeps] If you absolutely have to, you should share your request with the physician who will investigate and offer recommendations.

Answer format: ending1/ending2/ending3/ending4