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Item Value
Approval req'd? No
Available Stat? No
Test code OCAL
Performed by Quest
Sendout? Yes
Method Electrochemiluminescence (ECLIA)
Patient Preparation An 8 hour fast before specimen collection is preferred. Patients should not receive Biotin within 8 hours prior to collection
Container type Red top or Gold Top
Amount to Collect 2 mL blood
Sample type Serum
Preferred volume 1 mL serum
Min. Volume 0.5 mL serum
UCSF Rejection Criteria Hemolysis
Processing notes Freeze serum at -20C. Order Quest #16322, if patient is Brown/Toland order LabCorp #010249.
Ref Lab Rejection Criteria Hemolysis
Units ng/mL
Normal range
5-9 years 47-142 ng/mL
10-13 years 49-167 ng/mL
14-17 year old males 26-203 ng/mL
14-17 year old females 14-85 ng/mL
Males > 17 years 9-38 ng/mL
Females > 17 years 8-32 ng/mL

Stability Refrigerated 1 day, frozen at -20C 3 weeks
Turn around times Test performed Tuesday and Thursday. Turnaround time: 3-9 days.
Additional information This test is not a MediCal benefit; outpatients must be informed of this in writing and warned that they could be financially responsible for the cost of testing.
CPT coding 83937-90
LOINC code 2697-1
Last Updated 3/28/2011 10:26:32 AM
Entry Number 700
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