Call us today 800-522-5052

Test Compendium


Test Code

  • 3145

Test Synonym

  • Vitamin B3

Minimum Volume

  • 1.0 mL

Specimen Requirements

  • Serum Or Plasma


  • Transfer Tube- Frozen- Serum, Transfer Tube- Frozen- Plasma


  • Frozen

Turn Around Time

  • 5 days

CPT Codes

  • 82542
    *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

  • FROZEN -1 mL Serum from Red-top tube or plasma from lavender-top (EDTA) tube. Do not use SST tube for serum

Additional Information

  • Transfer the Serum from a Red Top or Plasma from a EDTA lavender top tube into a plastic transport tube. The specimen should be frozen immediately and maintained frozen until tested. To avoid delays in turnaround time when requesting multiple tests on frozen specimens, please submit separate frozen specimen for each test requested. Include the patient's age on the test request form and indicate if serum or plasma. Do not use SST (gel-barrier) for serum collection

Specimen Stability

  • AMBIENT: Unstable REFRIGERATED: Unstable FROZEN: 14 days