WhatDoMyLabResultsMean.com

Endocrine / Hormones

Insulin-Like Growth Factor 1 (IGF-1)

Also known as: IGF-1, Somatomedin C

CPT 87389Quest 91431LabCorp 083935
When to Seek Prompt Care

No common urgent flag from this test alone

What It Measures

IGF-1 is a protein that acts like a hormone. It shows how much growth hormone has been active in your body over a period of time.

Why It's Ordered

Your doctor might order this test to check for too much or too little growth hormone. They may also order it if you have unusual changes in how you grow. It can also help if there are concerns about your pituitary gland.

Reference Range

IGF-1 levels can vary based on age, sex, and other factors, and ranges vary by lab. Your doctor will interpret your results based on your individual health and the specific reference ranges used by the laboratory.

Clinical Reference

Quest: 91431
LabCorp: 083935
CPT: 87389
ICD-10: Z11.4, Z21, B20, Z20.6

Medicare covers for HIV screening (annually for high-risk) and diagnostic 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.