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HelpTest Code SFZ Sulfamethoxazole, Serum
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Reporting Name
Sulfamethoxazole, SSpecimen Type
Serum RedSpecimen Required
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube: Red top (gel tubes/SST are not acceptable)
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions:
1. Serum for a peak level should be collected 60 minutes after dose.
2. Within 2 hours of collection, centrifuge and aliquot serum into a 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) | 28 days | |
| Ambient | 28 days | ||
| Frozen | 28 days |
Specimen Minimum Volume
0.5 mL
Day(s) Performed
Monday, Thursday
Specimen Retention Time
14 daysReport Available
2 to 5 daysReference Values
>50 mcg/mL (Peak)
Useful For
Monitoring sulfamethoxazole therapy to ensure drug absorption, clearance, or compliance
CPT Code Information
80299
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| SFZ | Sulfamethoxazole, S | 10342-4 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 8238 | Sulfamethoxazole, S | 10342-4 |
Forms
If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) with the specimen.