Search our extensive Laboratory Test Directory to find test codes, ordering recommendations, specimen stability information, Test Fact Sheets, and more.
Recommendations when to order or not order the test. May include related or preferred tests.
Use to optimize dosing and monitor patient adherence.
New York DOH Approval Status
Indicates whether a test has been approved by the New York State Department of Health.
This test is New York state approved.
Specimen Required
Patient PreparationInstructions patient must follow before/during specimen collection.
Timing of specimen collection: Predose (trough) draw at steady state concentration.
CollectSpecimen type to collect. May include collection media, tubes, kits, etc.
Gray (potassium oxalate/sodium fluoride). Also acceptable: Plain red, green (sodium heparin), lavender (K2 or K3EDTA) or pink (K2EDTA).
Specimen PreparationInstructions for specimen prep before/after collection and prior to transport.
Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 2 mL serum or plasma to an ARUP standard transport tube. (Min: 1 mL)
Storage/Transport TemperaturePreferred temperatures for storage prior to and during shipping to ARUP. See Stability for additional info.
Refrigerated.
Unacceptable ConditionsCommon conditions under which a specimen will be rejected.
Gel separator tubes. Plasma or whole blood collected in light blue (sodium citrate). Hemolyzed specimens.
RemarksAdditional specimen collection, transport, or test submission information.
StabilityAcceptable times/temperatures for specimens. Times include storage and transport time to ARUP.
After separation from cells: Ambient: 1 week; Refrigerated: 2 weeks; Frozen: 3 years (Avoid repeated freeze/thaw cycles)
Methodology
Process(es) used to perform the test.
Quantitative Liquid Chromatography-Tandem Mass Spectrometry
Performed
Days of the week the test is performed.
Tue, Fri
Reported
Expected turnaround time for a result, beginning when ARUP has received the specimen.
1-7 days
Reference Interval
Normal range/expected value(s) for a specific disease state. May also include abnormal ranges.
Effective November 16, 2015
Dose-Related Range:
Prazepam (Dose: 20-60 mg/d) (Assayed as Nordiazepam)
Nordiazepam:
100-1500 ng/mL
Toxic:
Greater than 2500 ng/mL
Interpretive Data
May include disease information, patient result explanation, recommendations, or details of testing.
Prazepam is not detected in serum due to its rapid metabolism to nordiazepam. Adverse effects may include dizziness, fatigue, drowsiness, ataxia, and weakness.
The American Medical Association Current Procedural Terminology (CPT) codes published in ARUP's Laboratory Test Directory are provided for informational purposes only. The codes reflect our interpretation of CPT coding requirements based upon AMA guidelines published annually. CPT codes are provided only as guidance to assist clients with billing. ARUP strongly recommends that clients confirm CPT codes with their Medicare administrative contractor, as requirements may differ. CPT coding is the sole responsibility of the billing party. ARUP Laboratories assumes no responsibility for billing errors due to reliance on the CPT codes published.
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
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