When billing Capital Blue Cross – what CPT code do you use to bill a screening colonoscopy? I used ICD 10 Z12.11 as primary code for Colorectal Cancer Screening and CPT code 45378 for Colonoscopy/Screening. It’s been 10 years since his last one.

Patient is saying that anesthesia sent him a bill – when it should have been covered 100% as screening – our part of the bill was! He called the insurance company and they are saying that because we billed as diagnostic so did anesthesia. We got paid as a preventive service – HOW WOULD the anesthesia know how we billed? THe OP report clearing says it was for a screening.

Any advice is appreciated.