Cobalt, Blood Test
Cobalt, Blood Test can be requested without a referral, and this overview covers what to expect. The cobalt blood test measures the amount of cobalt in your blood. It is usually ordered to check for exposure to cobalt, which can come from metal implants, certain industrial jobs, or vitamin supplements. It may also be used to monitor people with artificial joints that contain cobalt-chromium alloys.
- Sample type
- blood
- Category
- General Wellness
- Turnaround
- 1-3 business days
- Price
- $249
- Referral
- Not required
The cobalt blood test measures the amount of cobalt in your blood. It is usually ordered to check for exposure to cobalt, which can come from metal implants, certain industrial jobs, or vitamin supplements. It may also be used to monitor people with artificial joints that contain cobalt-chromium alloys.
What it measures
- Cobalt, blood — The main measurement. It shows how much cobalt is in your blood at the time of the test.
- Cobalt, serum or plasma — Sometimes the test is done on the liquid part of blood rather than whole blood. The lab will specify which one.
- Creatinine — A waste product that shows how well your kidneys are working. It may be checked along with cobalt because the kidneys help remove cobalt from the body.
- Hemoglobin — The part of red blood cells that carries oxygen. Cobalt can affect red blood cell production, so this may be checked too.
Who it is for
A doctor may order this test if you have a metal hip or knee implant and symptoms like pain, swelling, or nerve problems. It can also be ordered if you work with cobalt or have been exposed to it in another way.
Preparation
No special preparation is usually needed. You do not have to fast. Tell your doctor about any vitamins or supplements you take, especially those containing vitamin B12, because they can contain cobalt.
Results and what they mean
Results are reported as a number, often in micrograms per liter (mcg/L). Your doctor will compare your result to a reference range and consider your symptoms, medical history, and other tests. This information is general and not medical advice; only a qualified clinician can interpret your results.
How to order this test
- Choose the test and place a confidential order online.
- Select a certified collection site and pick a time that suits you.
- Have your specimen collected — most draws take only a few minutes.
- Review results in a secure portal, typically within 1–3 days.
Preparation, hours, and pricing vary by site; confirm details directly with the lab before your visit.
Availability by state
Direct-access online ordering for the cobalt, blood test is available in most states. It is currently unavailable in 6 states:
Everywhere else you can order confidentially and collect your sample at a certified site. Browse by state →
Frequently asked questions
What can cause high cobalt levels?
High levels can come from a metal implant that is wearing down, from breathing cobalt dust at work, or from taking too much cobalt in supplements. Your doctor can help find the cause.
Do I need to fast for this test?
No, fasting is not required. You can eat and drink normally before the test.
How long does it take to get results?
Most results are ready in 1 to 3 business days.
Is this test covered by insurance?
Coverage depends on your insurance plan and why the test is ordered. Check with your insurance company or the lab before the test.