Mountain West · Fasting Insulin Test
Fasting Insulin Test in Colorado
Fasting Insulin Test is a laboratory test you can request directly. A fasting insulin test measures the level of insulin in your blood after you have not eaten for a period of time. It is often used alongside other tests to help assess how your body handles blood sugar.
Lab requirements in Colorado
Here is what you need before ordering and completing the Fasting Insulin Test in CO. 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
- You will typically need to fast for several hours before the blood draw, and you should follow the specific instructions provided by the collection lab. This may include avoiding food and…
- 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
The fasting insulin test is a blood test that quantifies the amount of insulin circulating in your bloodstream after an overnight fast. Insulin is a hormone made by the pancreas that helps move glucose from your blood into your cells for energy. This test is typically ordered with a fasting glucose test to give a more complete picture of glucose metabolism.
What it measures
- Fasting insulin — Reflects the amount of insulin in the blood after an overnight fast
What the test involves
The test involves a standard blood draw, usually from a vein in your arm, performed at a laboratory or collection site. You will be asked to fast for a certain number of hours before the sample is taken, as instructed by the lab.
Why it is often ordered
A clinician may order a fasting insulin test to help evaluate possible insulin resistance, hypoglycemia, or other conditions related to how your body regulates blood sugar. It is often used along with other tests to assess overall metabolic health.
Preparation
You will typically need to fast for several hours before the blood draw, and you should follow the specific instructions provided by the collection lab. This may include avoiding food and certain drinks, but water is usually allowed.
How results are reported
Results are reported as a numerical value for insulin concentration in the blood, and the lab will provide a reference range for comparison. Reference ranges can vary between laboratories, so your result should be interpreted in the context of the range provided by the testing lab.
Before you go
- The required fasting duration before the blood draw
- Whether any medications or supplements should be avoided
- Whether water is permitted during the fasting period
Cities
Fasting Insulin Test in Colorado communities
Choose your city for local context and to order this test.