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labcorp test code for insulin and c peptide C Peptide

Published October Oct 17, 2026 9:03 PM

When I began researching how to better understand my body’s metabolic markers, I found that navigating the world of laboratory diagnostics can feel incredibly overwhelming. As someone who manages their own wellness journey, I often look for clarity on how specific biomarkers function. If you are trying to find the right Labcorp test code for insulin and c peptide, you are likely looking for the same level of granular detail I was.

Understanding the Markers

The most common way to evaluate both markers simultaneously is through the Insulin and C-Peptide, serum Blood Test (213660). In my experience, using a specific Test Code makes the process significantly smoother when working with local collection sites.

When I first started, I was confused by the terminology. Insulin is the primary hormone our bodies use, while C-peptide is a byproduct—a connecting peptide—that is released in equal amounts to insulin. Because the body produces them together, measuring the level of this peptide in the blood pr Labcorp test details for Insulin, Four Specimens. Order Code, 147074. Order Code Name, Insulin (4 Specimens). Order Loinc. Result  ovides a clearer picture of endogenous production than measuring insulin C-Peptide Test - My Health Alberta alone, especially if one is interested in ho C-Peptide Test: Normal Range + Low & High Levels w the body handles insulin independently of exogenous sources.

Important Labcorp Test Codes

If you are putting together a list for your own records, here are some of the codes I encountered during my research:

Test Code: CPE. Tube type: EDTA. Special instructions. Send separate Glucose (fluoride) sample. Sample must be received in lab within 24 hours of collection 

* 213660: This is the combined Insulin and C-Peptide serum panel.

* 010108: This is the spe C-peptide is measured to tell the difference between insulin the body produces and insulin that is injected into the body. Someone with type 1 or type 2  cific C-Peptide test.

* 004333: This is the standalone Insulin test.

* 140533: This code is for Proinsulin.

* 123497: This refers to the NMR LipoProfile with Insulin Resistance markers.

* 884095: This is the Lipoprotein Insulin Resistance Index (LP-IR).

* 147074: Used for Insulin (4 Specimens).

I found that the C-Peptide test cost is between $29.00 and $179.00, depending on whether you are ordering a comprehensive panel or a single marker. It is always worth checking the current Labcorp directory, as codes like Test Code. 372 or Test Code: CPE might appear depending on the region.

Why These Tests Matter

For those of us tracking our metabolic health, peptide testing is a fascinating way to see how the body functions. I’ve learned that cpeptide levels are stable, whereas insulin can fluctuate rapidl C-Peptide Suppression. Rationale: This test has been used in cases in which the 72-hour diagnostic fast is inconclusive.1,2Production of C-peptide by normal  y based on immediate dietary intake. By looking at the Insulin C ratio, one can gain insight into how the pancreas is performing.

Whether you are looking into diabetes management or just general health optimization, understanding these metrics is key. I’ve noticed that many people also ask about 141598, which is a specialized LabCorp test related to insulin antibodies.

Final Thoughts on Personal Wellness

My journey into using these diagnostic tools has been about empowerment and data. Knowing that a test can provide specific Result Code, 338078 values helps me maintain a consistent log of my progress. Remember, the measures the amount of this product in the blood aspect is what makes these tests so reliable for those of us who prioritize data-driven lifestyle adjustments.

Always ensure you are using the correct Insulin C Peptide reference when reviewing your own documentation, and keep in mind that LabCorp updates their test menu frequently. By utilizing the Insulin and C combined panel, you get the most value for your time and effort in the laboratory.

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