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Test Code VITC Ascorbic Acid (Vitamin C), Plasma

Secondary ID


Useful For

Diagnosing vitamin C deficiency


As an aid to deter excessive intake

Method Name

Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

Portions of this test are covered by patent(s) held by Quest Diagnostics

Reporting Name

Ascorbic Acid, P

Specimen Type

Plasma Heparin

Shipping Instructions

Ship specimen in amber vial to protect from light.

Specimen Required

Patient Preparation: Fasting overnight (12-14 hours) (infants-draw prior to next feeding). Water can be taken as needed.

Supplies: Amber Frosted Tube, 5 mL (T192)

Collection Container/Tube: Green top (heparin)

Submission Container/Tube: Amber vial (T192)

Specimen Volume: 1 mL

Collection Instructions

1. Immediately place specimen on wet ice. Maintain specimen on wet ice and process within 4 hours of draw.

2. Centrifuge at 4° C, aliquot plasma into amber vial to protect from light and freeze immediately on dry ice.

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Plasma Heparin Frozen 14 days LIGHT PROTECTED

Reject Due To

Gross hemolysis Reject
Gross lipemia OK
Gross icterus OK

Reference Values

0.4-2.0 mg/dL

Day(s) and Time(s) Performed

Monday through Friday; Evening

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
VITC Ascorbic Acid, P 1903-4


Result ID Test Result Name Result LOINC Value
8312 Ascorbic Acid, P 1903-4

NY State Approved