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Unfortunately it's common, or at least it has happened to me too in the past. Hospitals will often bill out for each individual procedure (e.g. anesthesiologist, OB/GYN, pediatrician, hospital stay expenses, pharmacy, ENT specialist for hearing tests, etc.). If the bill isn't paid, then you have separate CA TLs listed for each item. I think due to HIPAA, they cannot merge them, but I could be wrong. It would be worth it to ask the OC to see if they would merge them together.