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Performing Laboratory

Michigan Co-Tenancy Laboratory at Warde Medical Laboratory (MCL)

Useful For

Evaluating nutritional deficiency

Method Name

High-Performance Liquid Chromatography (HPLC)

Reference Values

6.2-39.0 nmol/L

Days and Times Test Performed

Monday, Wednesday and Friday

Report Available

5 Days

Maximum Laboratory Time

7 Days

Specimen Type


Preferred Container

Lavender Top Tube (EDTA)

Preferred Volume

Plasma: 2 mL (Lavender Top Tube (EDTA))

Minimum Volume

Plasma: 0.5 mL (Lavender Top Tube (EDTA))

Specimen Collection and Handling

1. Draw blood in a lavender EDTA tube.

2. Spin specimen, separate and send plasma frozen in an amber screw-capped plastic vial.

3. Protect sample from light.

Rejection Information

Sample collected in SST or PST

Specimen Stability Information

Specimen Type: Plasma

Frozen: 30 Days

Refrigerated: 24 Hours

Room Temp: 4 Hours

Add On Capable

Contact Reference Lab – If add-on can never be done, report the test to the Administrative Analyst

Advance Beneficiary Notice Requirements

No ABN Required

CPT Code Information

CPT Code

CPT Description

CPT Disclaimer

84252 Riboflavin (Vitamin B2)

LOINC Code Information


Performing Laboratory Location

Michigan Co-Tenancy Laboratory at Warde Medical Laboratory (MCL)