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Pacific · Growth Hormone Level Test – GH Blood Test

Growth Hormone Level Test – GH Blood Test in California

Growth Hormone Level Test – GH Blood Test can be ordered without a referral from your own doctor, and this guide covers what to expect. A growth hormone level test measures the amount of human growth hormone in the blood. It helps evaluate conditions related to growth hormone deficiency or excess.

Sample typeBlood and/or urine at a collection lab
ReferralIncluded — no referral from your own doctor needed

Lab requirements in California

Here is what you need before ordering and completing the Growth Hormone Level Test – GH Blood Test in CA. Review each item and confirm the details with the collection lab.

Physician's order
Included. A physician's order is required for lab testing and is provided for you by our partner's physicians — no referral from your own doctor is needed.
Fasting
Fasting is required for this test — follow the collection lab's instructions.
Preparation
Preparation instructions can vary depending on the specific reason for testing and the laboratory performing the analysis. Always follow the collection lab's directions regarding fasting…
Sample & visit
A blood and/or urine sample is collected; the visit usually takes about 10 minutes.
Identification
Bring the lab requisition form from your account. The collection lab may also ask for a government-issued photo ID.
Turnaround
1-3 business days
Availability
Our partner lab does not serve ND, RI, NY, NJ, MD or HI. Confirm availability for your location with the collection lab.

Before you go

  • Order your test before visiting a lab, then use the requisition form in your account.
  • Print the requisition form, or fax it to the lab directly from your account.
  • No scheduling is needed — visit the collection lab during its normal business hours.
  • A blood and/or urine sample is collected; the visit usually takes about 10 minutes.
  • Bring a government-issued photo ID in case the lab requests it.
  • Results are posted to your secure account within 1–3 business days.

Requirements are summarized from our partner lab's published policies. Preparation and availability can change — confirm current instructions with the collection lab before your visit.

What this test is

This blood test quantifies the concentration of growth hormone, a hormone produced by the pituitary gland that regulates growth, metabolism, and muscle and bone health. Because growth hormone is released in pulses, a single measurement may be interpreted alongside other tests or dynamic stimulation/suppression procedures.

What it measures

  • Growth hormone (GH) — Reflects the amount of human growth hormone circulating in the blood at the time of collection.

What the test involves

The test requires a standard blood draw from a vein in your arm, usually collected at a laboratory or clinic. In some cases, multiple samples may be taken over a period of time to account for the hormone's natural fluctuations.

Why it is often ordered

A clinician may order this test to investigate symptoms of growth hormone deficiency, such as delayed growth in children or changes in body composition in adults. It can also be used to evaluate suspected excess growth hormone production, which may cause conditions like acromegaly or gigantism.

Preparation

Preparation instructions can vary depending on the specific reason for testing and the laboratory performing the analysis. Always follow the collection lab's directions regarding fasting, timing, and any medications.

How results are reported

Results are typically reported as a numerical value in nanograms per milliliter (ng/mL) or micrograms per liter (mcg/L). Reference ranges differ between laboratories and may depend on age, sex, and the time of day the sample was collected, so your clinician will interpret your result in context.

Before you go

  • Whether fasting is required before the blood draw
  • Any medications or supplements that might affect growth hormone levels
  • The best time of day to schedule the collection

Cities

Growth Hormone Level Test – GH Blood Test in California communities

Choose your city for local context and to order this test.

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