C-Peptide, Ultrasensitive (Endocrine Sciences)

CPT: 84681
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Test Details


C-peptide measurement


This assay has a lower limit of detection of 0.004 ng/mL.


Electrochemiluminescence (ECL)

Specimen Requirements


Serum (preferred) or plasma


1 mL

Minimum Volume

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


Gel-barrier tube, red-top tube, or lavender-top (EDTA) tube


Serum or plasma must be separated from cells within 45 minutes of venipuncture. Submit specimen in a plastic transport tube. Freeze plastic transport tube (preferred) or refrigerate. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.

Storage Instructions

Freeze (preferred) or refrigerate. Stable at room temperature for one day or refrigerated for seven days. Stable for 348 days frozen. Freeze/thaw cycles: x6.


Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
503830 C Peptide, Ultrasensitive, ES 503833 C Peptide, Ultrasensitive, ES ng/mL 1986-9

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