Hospital Lab
$150
cash pay
Other Labs
$35
+ lab fees
TestWell
$29.99
+ $6 lab fee
C-Peptide is a byproduct of insulin production released by the pancreas in equal amounts to insulin. Unlike insulin itself, C-Peptide is not affected by external insulin injections, making it the gold standard for measuring how much insulin your body is naturally producing. It is essential for differentiating Type 1 diabetes (low C-Peptide) from Type 2 (normal or high C-Peptide), and for assessing pancreatic beta cell function over time.
Diabetes and blood-sugar testing identifies insulin resistance, pre-diabetes, and diabetes early — when lifestyle changes still have the highest impact.
Adults with risk factors for diabetes: family history, overweight/obesity, sedentary lifestyle, prior gestational diabetes, or signs like increased thirst, fatigue, or unexplained weight changes.
Sample Type
Blood draw
Fasting
Required
Results In
2–4 business days
Performed At
Labcorp
Your C-Peptide results will include values for each of the 1 biomarker tested, along with reference ranges. Results are reviewed by a licensed physician before being released to your secure portal.
If any values fall outside the normal range, your report will include guidance on what that may mean and recommended next steps. You'll receive an email notification when your results are ready, typically within 2–4 business days.
Typical reference range layout
Lab reports show where your value sits relative to established reference intervals—your physician interprets this in context for you.
Your C-Peptide results will include values for each of the 1 biomarker tested, along with reference ranges. Results are reviewed by a licensed physician before being released to your secure portal.
If any values fall outside the normal range, your report will include guidance on what that may mean and recommended next steps. You'll receive an email notification when your results are ready, typically within 2–4 business days.
Typical reference range layout
Lab reports show where your value sits relative to established reference intervals—your physician interprets this in context for you.
Fasting for 8–12 hours required.
Fasting for 8–12 hours required.
TestWell Price
$29.99
+ $6 lab processing fee at checkout
No insurance needed · HIPAA compliant
Better value: the Pre-Diabetes Panel
Save $34.96This test is part of the Pre-Diabetes Panel — 5 tests · 9 biomarkers for $89.99, $34.96 less than à la carte.
$89.99$124.95
5 tests · 9 biomarkers
Frequently ordered together
Customers who ordered C-Peptide also added these for a more complete health picture.
Not sure where to start?
C-Peptide
$29.99