WhatDoMyLabResultsMean.com

Diabetes / Glucose

C-Peptide

Also known as: Connecting Peptide

CPT 84481Quest 1759LabCorp 010389
When to Seek Prompt Care

If you experience symptoms like severe sweating, shakiness, dizziness, confusion, or a very fast heartbeat, seek urgent medical attention. These could be signs of dangerously low blood sugar.

What It Measures

A C-peptide test checks how much C-peptide is in your blood or pee. Your pancreas makes C-peptide when it makes insulin. Insulin helps your body use sugar for energy.

Why It's Ordered

Your doctor orders this test to see how much insulin your body makes. This helps find out if you have certain kinds of diabetes. It also checks if your diabetes medicine is working. Sometimes, it helps find out why your blood sugar is low.

Reference Range

C-peptide levels can vary by lab, and interpretation may depend on factors like age, sex, and clinical context. Your doctor will consider these when reviewing your results.

Clinical Reference

Quest: 1759
LabCorp: 010389
CPT: 84481
ICD-10: E03.9, E05.90, R94.6

Medicare covers for thyroid disorder evaluation

Educational purposes only — This information is not a substitute for professional medical advice, diagnosis, or treatment. Always discuss your lab results with your healthcare provider.