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Test Code LAB4092 FOLATE

Important Note

Protect specimen from light. Fasting specimen recommended; recent food intake may increase folate concentration.

Specimen Type

Preferred Specimen: Lithium Heparin Plasma (Mint/Light Green Top Tube). Protect from light.

Alternate Specimen: Serum (SST, Gold, Tiger, Red Top Tube). Protect from light.

 

Specimen Volume

1 mL

 

Minimum Volume

0.5 mL

Microtainer - 0.2mL

Turnaround Time

STAT: 1 hour
Routine: 4 hours

Test Schedule

Daily

Sample Stability

Refrigerated: 7 days
Frozen: 30 days

Unacceptable Specimens

Hemolyzed Specimen

Method

Immunoassay

Reference Ranges

Age Range
0 up to 5 days None established
5 days up to 1 year >10.5 ng/mL
1 year up to 3 years >3.8 ng/mL
3 years up to 6 years >11.8 ng/mL
6 years up to 8 years >13.0 ng/mL
8 years up to 12 years >11.3 ng/mL
12 years up to 14 years >11.8 ng/mL
14 years up to 19 years >7.8 ng/mL
19 years and older 7.0 - 31.4 ng/mL

  

Reporting Limit

Measuring Range: 2.2-20.0 ng/mL

Reporting Range: 2.2-40.0 ng/mL (1:2 dilution)

Synonyms

FOLIC ACID, FOL, MACROCYTIC ANEMIA, LAB4092

CPT Codes

82746