Vitamin B12 and Folates

TEST: 000810
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CPT: 82607; 82746
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Test Includes

Folate; vitamin B12

Special Instructions

This test may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin (also termed as vitamin B7 or B8, vitamin H, or coenzyme R). It is recommended to ask all patients who may be indicated for this test about biotin supplementation. Patients should be cautioned to stop biotin consumption at least 72 hours prior to the collection of a sample.

Expected Turnaround Time

Within 1 day

Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.

Related Documents

Specimen Requirements

Specimen

Serum

Volume

1.5 mL

Minimum Volume

0.6 mL (Note: This volume does not allow for repeat testing.)

Container

Red-top tube or gel-barrier tube

Collection

If red-top tube is used, transfer separated serum immediately to a plastic transport tube.

Storage Instructions

Refrigerate

Stability Requirements

Temperature

Period

Room temperature

1 day

Refrigerated

7 days

Frozen

14 days

Freeze/thaw cycles

Stable x3

Causes for Rejection

Plasma specimen

Test Details

Methodology

Electrochemiluminescence immunoassay (ECLIA)

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
000810 Vitamin B12 and Folate 96805-7 001503 Vitamin B12 pg/mL 2132-9
000810 Vitamin B12 and Folate 96805-7 002020 Folate (Folic Acid), Serum ng/mL 2284-8

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