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HelpTest Code MCRPL Macroprolactin, Serum
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
SerumSpecimen Required
Patient Preparation: For 12 hours before specimen collection do not take multivitamins or dietary supplements containing biotin (vitamin B7), which is commonly found in hair, skin, and nail supplements and multivitamins.
Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions: Centrifuge and aliquot serum into a plastic vial.
Specimen Minimum Volume
0.6 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Refrigerated (preferred) | 7 days | |
| Frozen | 90 days | ||
| Ambient | 24 hours |
Reference Values
PROLACTIN, TOTAL
Males
<18 years: not established
≥18 years: 4.0-15.2 ng/mL
Females
<18 years: not established
≥18 years: 4.8-23.3 ng/mL
PROLACTIN, UNPRECIPITATED
Males
<18 years: not established
≥18 years: 2.7-13.1 ng/mL
Females
<18 years: not established
≥18 years: 3.4-18.5 ng/mL
When the percent of the precipitated (complexed) prolactin fraction of the total prolactin is 60% or less, the result is considered negative for macroprolactin.
Day(s) Performed
Monday through Sunday
CPT Code Information
84146 x 2
Report Available
Same day/1 to 3 daysSpecimen Retention Time
7 daysReject Due To
| Gross hemolysis | Reject |
| Gross lipemia | OK |