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Test Compendium


Test Code

  • 6092

Test Synonym


Minimum Volume

  • 2 mL

Specimen Requirements

  • Serum


  • Amber Tube- Refrigerated, Serum Separator Tube, Plain Red Top Tube


  • Refrigerated

Turn Around Time

  • 4 days

CPT Codes

  • 84590
    *The CPT codes provided are based on AMA guidelines and are provided for informational purposes only. CPT coding is the responsibility of the billing entity. Please direct any questions regarding the CPT coding to the payer being billed.

Special Instructions

  • 2 mL serum in an amber transport tube protected from light

Additional Information

  • Specimen should be free from hemolysis. PROTECT FROM LIGHT. Transfer serum specimen to amber plastic transport tube. This test requires 2mL Patients must fast a minimum of eight hours. No foods containing vitamin A should be ingested in the previous 48 hours by patients older than six months. For those who are younger than six months, the period is 24 hours.

Specimen Stability

  • AMBIENT: 7 days REFRIGERATED: 7 days FROZEN: 7 days