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HelpTest Code LAB468 Diazepam and Nordiazepam, Serum
Test Down Notes
This test is temporarily unavailable due to instrumentation issues. As an alternate, order ZW86 (1501SP). For additional details, see test update here.
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Reporting Name
Diazepam and Nordiazepam, SSpecimen Type
Serum RedSpecimen Required
Collection Container/Tube: Red top (Serum gel/SST are not acceptable)
Submission Container/Tube: Plastic vial
Specimen Volume: 0.5 mL
Collection Instructions: Centrifuge and aliquot serum into plastic vial.
Reject Due To
| Gross hemolysis | OK |
| Gross lipemia | OK |
| Gross icterus | OK |
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum Red | Refrigerated (preferred) | 14 days | |
| Ambient | 14 days | ||
| Frozen | 14 days |
Specimen Minimum Volume
0.3 mL
Day(s) Performed
Monday, Wednesday
Specimen Retention Time
14 daysReport Available
3 to 7 daysReference Values
Therapeutic concentrations
Diazepam and Nordiazepam: 200-2,500 ng/mL
Useful For
Assessing compliance
Monitoring for appropriate therapeutic level
Assessing diazepam toxicity
CPT Code Information
80299
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| DIA | Diazepam and Nordiazepam, S | 49044-1 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 8629 | Diazepam | 3548-5 |
| 2475 | Nordiazepam | 3537-8 |
| 2459 | Diazepam and Nordiazepam | 16757-7 |
Forms
If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:
-Neurology Specialty Testing Client Test Request (T732)
-Therapeutics Test Request (T831)