Mountain West · Marijuana Cannabis (Weed) Drug Test
Marijuana Cannabis (Weed) Drug Test in Colorado
Marijuana Cannabis (Weed) Drug Test can be ordered without a referral from your own doctor, and this guide covers what to expect. A marijuana cannabis drug test detects cannabinoid markers in blood or urine to assess recent or past use. It is typically ordered for clinical, employment, or monitoring purposes.
Lab requirements in Colorado
Here is what you need before ordering and completing the Marijuana Cannabis (Weed) Drug 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
- Some tests require fasting or avoiding certain foods or drinks beforehand. You will be informed when you order — confirm the details with the collection lab.
- Preparation
- Preparation is minimal, but you should follow the specific instructions provided by the collection laboratory. This may include avoiding certain foods or medications, so always confirm…
- 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 test screens for cannabinoids, the active compounds in marijuana, using a blood or urine sample. It can indicate recent use, though it does not measure impairment or frequency of use.
What it measures
- THC (tetrahydrocannabinol) — the primary psychoactive compound in marijuana
- THC-COOH (carboxy-THC) — a metabolite that indicates recent or past use
- Cannabidiol (CBD) — a non-psychoactive cannabinoid sometimes included in screens
- Cannabinol (CBN) — a breakdown product that may suggest older use
What the test involves
The test involves a standard blood draw from a vein in your arm or a urine sample collected at a laboratory. Both methods are quick and usually require no special preparation beyond following the lab's instructions.
Why it is often ordered
A clinician may order this test as part of a routine health evaluation, pre-employment screening, or monitoring for substance use. It is also used in some clinical settings to assess potential drug interactions or compliance with treatment plans.
Preparation
Preparation is minimal, but you should follow the specific instructions provided by the collection laboratory. This may include avoiding certain foods or medications, so always confirm details with the lab before your visit.
How results are reported
Results are reported as either negative or positive, with positive results sometimes followed by a confirmation test to identify specific cannabinoids. Reference ranges and cutoff levels vary by laboratory, so your results should be interpreted in the context of the lab's own standards.
Before you go
- Whether a blood or urine sample will be collected
- Any medications or foods to avoid before the test
- How and when results will be shared with you
Cities
Marijuana Cannabis (Weed) Drug Test in Colorado communities
Choose your city for local context and to order this test.