Collect

For the University City campus, collect in a light-green plasma separator tube (preferred):
Plasma Separator Tube
(Lithium Heparin)
OR
Plasma Separator Tube
(Lithium Heparin)
For all other satellite locations:
Gold Top Tube 
(Serum Separator Tube)
OR
Microtainer Gold Top 
(Serum Separator Tube)

Specimen Preparation

Follow Central Lab Services processing protocol.

Storage/Transport Temperature

Room temperature

Stability (from collection to initiation)

Before separation from cells
After separation from cells
Room Temperature
≤ 4 hours 
Room Temperature
≤ 4 days
Refrigerated (2-8 C)
≤ 7 days 
Frozen (-20 C)
≤ 3 months 

Volume Required

0.5 mL blood

Minimum Required

0.2 mL blood

Phlebotomy Draw

Yes

Performing Lab

Chemistry Laboratory

Performed

24/7

Methodology

Spectrophotometry

Reported

STAT: 60 minutes
Routine: 90 minutes

LIS Mnemonic

FE

Available STAT

Yes

Reference Ranges

Age Male Female
0D-20 Yrs 25-140 ug/dL 25-140 ug/dL
>= 21 Yrs 49-181 ug/dL 37-170 ug/dL

CPT Codes

83540
Collection

Collect

For the University City campus, collect in a light-green plasma separator tube (preferred):
Plasma Separator Tube
(Lithium Heparin)
OR
Plasma Separator Tube
(Lithium Heparin)
For all other satellite locations:
Gold Top Tube 
(Serum Separator Tube)
OR
Microtainer Gold Top 
(Serum Separator Tube)

Specimen Preparation

Follow Central Lab Services processing protocol.

Storage/Transport Temperature

Room temperature

Stability (from collection to initiation)

Before separation from cells
After separation from cells
Room Temperature
≤ 4 hours 
Room Temperature
≤ 4 days
Refrigerated (2-8 C)
≤ 7 days 
Frozen (-20 C)
≤ 3 months 

Volume Required

0.5 mL blood

Minimum Required

0.2 mL blood

Phlebotomy Draw

Yes
Ordering

Performing Lab

Chemistry Laboratory

Performed

24/7

Methodology

Spectrophotometry

Reported

STAT: 60 minutes
Routine: 90 minutes

LIS Mnemonic

FE

Available STAT

Yes
Result Interpretation

Reference Ranges

Age Male Female
0D-20 Yrs 25-140 ug/dL 25-140 ug/dL
>= 21 Yrs 49-181 ug/dL 37-170 ug/dL
Administrative

CPT Codes

83540