Find Locations
For hours, walk-ins and appointments.Expected Turnaround Time
3 - 5 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Specimen Requirements
Specimen
Whole blood
Volume
7 mL
Minimum Volume
3 mL
Container
Lavender-top (EDTA) tube, gray-top (sodium fluoride) tube, or green-top (heparin) tube
Storage Instructions
Submission/transport (<3 days): Room temperature. For storage beyond three days, specimen should be refrigerated or frozen.
Test Details
Use
Detect presumptive presence of tetrahydrocannabinol (THC)
Methodology
Presumptive testing by immunoassay (IA) at a testing threshold of 5 ng/mL. Presumptive positives are not confirmed by a definitive method.
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 791544 | THC Screen ONLY, WB | 761546 | THC (Marijuana) Metabolite | 42492-9 | ||
| 791544 | THC Screen ONLY, WB | 790956 | Specimen Type | 31208-2 |
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The LOINC® codes are copyright © 1994-2021, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf