LabInformationLab tests, explained

Cortisol Levels Blood Test in California

Cortisol Levels Blood Test can be requested without a referral, and this overview covers what to expect. A cortisol levels blood test measures the amount of cortisol, a hormone your adrenal glands make, in your blood. It is ordered to check for conditions such as Addison's disease or Cushing's syndrome, and to evaluate symptoms like fatigue, weight changes, or high blood pressure. This page covers the cortisol levels 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
$109
Referral
Not required

A cortisol levels blood test measures the amount of cortisol, a hormone your adrenal glands make, in your blood. It is ordered to check for conditions such as Addison's disease or Cushing's syndrome, and to evaluate symptoms like fatigue, weight changes, or high blood pressure.

What it measures

  • Cortisol — The main hormone being measured; levels change throughout the day.
  • Collection time — The time the blood was drawn, because cortisol peaks in the morning and drops later.
  • Reference range — The expected range for the time of day your sample was taken.

Who it is for

Doctors order this test when they suspect a cortisol imbalance, such as too much or too little cortisol, based on symptoms like unexplained weight gain or loss, fatigue, or darkening of the skin.

Preparation

Preparation depends on the time your test is scheduled. Often no fasting is required, but your doctor may ask you to avoid certain medications or to have the test at a specific time, such as early morning.

Results and what they mean

Results are reported as a number in micrograms per deciliter (mcg/dL) and are compared to a reference range for the time of day. Your clinician interprets the result along with your symptoms and other tests. This is general information, not medical advice; only your healthcare provider can diagnose or treat any condition.

Requesting the Cortisol Levels 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 for a cortisol blood test?

Usually no fasting is needed, but follow your doctor's instructions because some tests require it.

Why does the time of day matter?

Cortisol levels naturally rise and fall during the day, so the reference range changes depending on when your blood is drawn.

What can affect my cortisol result?

Stress, pregnancy, certain medicines, and the time of day can all affect your cortisol level.

How long do results take?

Results are typically available in 1 to 3 business days.

Cortisol Levels Blood Test by city in California

All testing in California →   Full Cortisol Levels Blood Test guide →