Innovation Through Pioneering Technology SM

Call us today 800-522-5052

For billing information:

Test Compendium


Test Code

  • 8540

Test Synonym

  • C1 Esterase Inhibitor, Functional

Minimum Volume

  • 0.1 mL

Specimen Requirements

  • Serum Or Plasma


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


  • Frozen

CPT Codes

  • 86161
    *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

  • 0.5 mL Frozen SERUM from Red Top OR EDTA Plasma

Additional Information

  • Serum from a Red Top tube or plasma from a Lavender (EDTA) Top tube Separate serum or plasma from cells and transfer to a plastic transport tube before freezing. To avoid delays in turnaround time when requesting multiple tests on frozen samples, PLEASE SUBMIT SEPARATE FROZEN SPECIMENS FOR EACH TEST REQUESTED. Ship Frozen

Specimen Stability

  • AMBIENT: serum 6hrs /EDTA plasma 24 hrs REFRIGERATED: FROZEN: stable