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Labcorp Oklahoma, Inc.
Test Directory



Order Name Macroprolactin
Test Number: 5194369
Revision Date 12/12/2022
Test Name Methodology LOINC Code
Electrochemiluminescence (ECL)  
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 2 mL (1 mL) Serum Clot Activator (SST or Red No-Gel) Frozen
Alternate 1 2 mL (1 mL) Plasma EDTA (Lavender Top) Frozen
Instructions Notes: 1 mL (Note: This volume Does NOT allow for repeat testing).
Specimen Type: Gel-barrier tube, red-top tube, lavender-top (EDTA) tube, serum transfer tube, OR green-top (heparin) tube
Specimen Storage: FREEZE
Specimen Collection: Do NOT draw sample until patient has been awake for at least two (2) hours. Separate serum or plasma from cells within 45 minutes of collection. Transfer specimen to a plastic transport tube before freezing. To avoid delays in turnaround time when requesting multiple test on frozen samples, PLEASE SUMBIT SEPARATE FROZEN SPECIMEN FOR EACH TEST REQUESTED.
Special Instructions: Testing is performed at Esoterix Endocrinology Laboratory: ES#500375
Specimen Stability: Ambient: 14 days, Refrigerated : 14 days, Frozen: 6 months
Expected TAT 5 - 10 days  
Performing Labcorp Test Code 500324 
Notes Labcorp Test Code: 500324
CPT Code(s) 84146x2
Lab Section Reference Lab