LabInformationLab tests, explained

IGF-1 Insulin Blood Test in California

This page explains the igf-1 insulin blood test, what it measures, and how to arrange it. An IGF-1 (insulin-like growth factor 1) blood test measures a hormone that reflects growth hormone activity in the body. It is usually ordered to evaluate growth problems, suspected growth hormone excess or deficiency, or to monitor related treatment. This page covers the igf-1 insulin blood test for people in California, in Pacific, from what it measures to how to arrange a draw.

Sample type
blood
Category
Hormone
Turnaround
1-3 business days
Price
$129
Referral
Not required

An IGF-1 (insulin-like growth factor 1) blood test measures a hormone that reflects growth hormone activity in the body. It is usually ordered to evaluate growth problems, suspected growth hormone excess or deficiency, or to monitor related treatment.

What it measures

  • IGF-1 (insulin-like growth factor 1) — The main hormone measured; it mirrors average growth hormone levels over recent days.
  • Growth hormone (sometimes) — May be checked alongside IGF-1, though it fluctuates widely through the day.
  • IGFBP-3 (sometimes) — A binding protein that carries IGF-1; can help interpret results in some cases.
  • Related hormone tests — Other hormones may be added by your clinician based on your symptoms.

Who it is for

A clinician such as an endocrinologist, pediatrician, or primary care provider typically orders this test when growth, pituitary, or hormone concerns are being evaluated.

Preparation

Often no fasting is required, but some laboratories prefer a morning sample. Follow the specific instructions from your clinician or lab.

Results and what they mean

Results are reported as a number compared with a reference range for your age and sex. A clinician interprets the value alongside your symptoms and other tests; it is not a diagnosis on its own. This is general information, not medical advice.

Requesting the IGF-1 Insulin Blood Test in California

Order online, choose a certified collection site in California, and review results through a secure portal. No referral is required, and orders are processed confidentially. Because the region is uneven, coastal metros, inland towns, and rural counties with very different access to testing — worth planning around when you book.

Frequently asked questions

Do I need to fast?

Usually not, but your lab may ask for a morning draw. Check your instructions.

How soon will I get results?

Typical turnaround is 1 to 3 business days, though it can vary by lab.

Can I take my medications?

Ask your clinician, since some medicines and conditions can affect IGF-1 levels.

Is one test enough?

Sometimes repeat or additional tests are needed; your clinician will decide.

IGF-1 Insulin Blood Test by city in California

All testing in California →   Full IGF-1 Insulin Blood Test guide →