Question:
When can both flow cytometry and immunohistochemistry (IHC) be reported together with modifier 59 or XU?
Answer:
Generally, not reimbursed for testing when duplicate testing is performed on the same or similar specimens. The diagnosis should be established using one of these methods. However, a payer may reimburse both procedures if both methods are required because the initial method does not explain all initial findings based on light microscopic examination. If the need for both methods is documented in the medical record, the provider may report both – flow cytometry and IHC – by using modifier 59 or XU.
This question was answered in our annual Laboratory Coding Update webcast. For more hot topics relating to laboratory services, please visit our store or call us at 1.800.252.1578, ext. 2.
