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Geisinger Medical Laboratories Test Catalog
C-PEPTIDE |
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ORDERING INFORMATION: |
Geisinger Epic Procedure Code: LAB1903 Geisinger Epic ID: 21640 | |
SPECIMEN COLLECTION |
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Specimen type: |
Serum | |
Preferred collection container: |
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Specimen required: |
1 mL aliquot of serum; minimum 0.4 mL. | |
Special notes: |
Please submit a separate frozen aliquot for non-GMC sites. It may not be combined with any other test requiring a frozen aliquot. | |
| SPECIMEN PROCESSING |
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Specimen processing instructions: |
Allow to clot. Centrifuge at 1100-2000 g for a minimum of 10 minutes. | |
Transport temperature: |
Frozen. | |
Specimen stability: |
Room temperature: 4 hours. Refrigerated: 24 hours. Frozen: 30 days. | |
Rejection criteria: |
Specimens beyond stability limits. | |
TEST DETAILS |
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Reference interval: |
1.1-4.4 ng/mL (fasting) | |
CPT code(s): |
84681 | |
| Note: The billing party has sole responsibility for CPT coding. Any questions regarding coding should be directed to the payer being billed. The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only. | ||
Test includes: |
C-Peptide | |
Methodology: |
Electrochemiluminescence Immunoassay |
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Synonyms: |
CPEPG, Connecting peptide
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Clinical significance: |
A nonreactive breakdown of insulin, it is used in the evaluation of pancreatic beta cell function in diabetes and for determining the source of insulin in patients with hyperinsulinemic hypoglycemia. | |
Doctoral Director(s:) |
Hoi-Ying Elsie Yu, PhD, DABCC Sheng-Ying (Margaret) Lo, PhD, DABCC |
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| Review Date: | 03/24/2023 | |