Is anyone having difficulty on billing 36415 and 84153 together? Lately, I have been getting a denial for 84153 from Blue Shield when billed with 36415. Health plan states to use modifier 59 on this, but I don't feel that is appropriate use of this modifier. I work for an Oncology/Hematology office and we have our own lab. I have came across some information that state that 36415 is not reimbursable by some insurances when billed with the lab codes, but I'm just curious if anyone has any additional information on this. I would be forever grateful!