To rule out hook effect, order a Prolactin (215/84146.0) and a Miscellaneous Sendout (994/LAB994), specifying "Prolactin dilutions to rule out hook effect".
01/18/2023: The test is temporarily being referred to LabCorp: Prolactin, Pituitary Macroadenoma, Serum LabCorp (004500): R- LC
NOTE: This is not the same as Macroprolactin. If requested, follow the Path approval process for MSO's (Allina sites) or contact Client Services for assistance.