TEST CHANGE
Beta 2 Transferrin
Order Code: BETA2
Fee Code: AA727 (CPT 86335)
LOINC: 13876-8
Reference Lab: Mayo BETA2
Effective October 16, 2025, Mayo Clinic Laboratories will make Beta 2 Transferrin obsolete due to the availability of an automated methodology for Beta-Trace Protein. The recommended alternative test is Beta-Trace Protein, Body Fluid (Mayo test code: BTP)
Collection Instructions: Collect 0.5 mL of body fluid in a sterile container, syringe (with needle removed), test tube, or microtube. Plain cotton swab, pledget, or facial tissue is also acceptable. Do not collect specimen with a culture swab. Do not add any additional liquid other than source to the swab or gauze. Do not collect or send swab or gauze specimens in containers with additional liquids or additives
Reference Range:
Beta-trace protein concentration < 5 mg/L is negative for cerebrospinal fluid.
Beta-trace protein concentration 5-7 mg/L is indeterminate for presence of cerebrospinal fluid.
Beta-trace protein concentration >7 mg/L is consistent with the presence of cerebrospinal fluid.