Prolactin, Total and Monomeric

Test Code

CPT Codes
84146 (x2)

Total Prolactin, Free Prolactin

Preferred Specimen
1 mL serum

Minimum Volume
0.4 mL

Other Acceptable Specimens

Transport Container
Plastic screw-cap vial

Transport Temperature
Room temperature

Specimen Stability
Room temperature: 7 days
Refrigerated: 7 days
Frozen: 6 months

Immunoassay (IA) • PEG Precipitation

Setup Schedule
Set up: Wed; Report available: 3 days

Reference Range
See Laboratory Report

Clinical Significance
For some patients the level of Prolactin measured by immunoassay may be inaccurate with respect to the level of monomeric, biologically active Prolactin. The Macroprolactin by PEG Precipitation test can help to identify if a patient sample has elevated Prolactin due to mostly inactive protein-bound Prolactin (Macroprolactin).

Performing Laboratory
Quest Diagnostics Nichols Inst San Juan Capistrano
33608 Ortega Highway
San Juan Capistrano, CA 92690-6130

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.