| Test Name: | Gas Chromatography/Mass Spectroscopy (GC/MS) |
| Epic Order Code: | LAB678 |
| CPT Code: | 82541 | | |
| Specimen(s) Type: | Serum or Plasma, 3 mL; Urine, 5 mL; Gastric Contents,
5 mL |
| Acceptable Container(s): | Serum/Plasma:   Tops are red and purple (lavender). |
| | Urine/Gastric:  Sterile container |
| Testing Schedule: | Monday-Friday, 7:30 a.m.-4 p.m. After-hours, emergency basis only. |
| Turn Around Time: | STAT: 1 hour |
| | Routine: 3 hours |
| Collection Information: | No special patient preparation is required. Obtain specimen by standard collection procedures. Do not collect in serum separator tubes. |
| Transport Information: | Deliver to lab immediately. All specimens must be signed into the laboratory. |
| Reference Clients: | If unable to deliver to the lab within 1 hour, store and transport at 2-8° C. Specimen is stable as long as it remains tightly capped. |
| Causes for Rejection: | Improperly labeled, incorrect container, contaminated, insufficient quantity, incorrect transport. |
| Reference Range: | NA |
| Additional Information: | GC/MS is normally used in conjunction with immunoassay drugs of abuse screens for the detection of both drugs of abuse and therapeutics. We maintain a database of approximately 2,200 drugs and their metabolites for detection and identification. |