| Test Name: | Tacrolimus |
| Epic Order Code: | LAB876 |
| CPT Code: | 80197 | | |
| Specimen(s) Type: | Whole Blood; Full tube required. |
| Acceptable Container(s): |  Tube top is purple (lavender). |
| Testing Schedule: | Tested as received between the hours of 7 a.m.-3 p.m.; 7 days/week |
| Turn Around Time: | STAT: NA |
| | Routine: 2 hours when received between 7 a.m.-3 p.m.; Specimens received after 3pm are held until the following morning. |
| Collection Information: | No special patient preparation is required. Obtain specimen by standard collection procedures. |
| 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. Do not centrifuge. Specimen must be received in the lab within 7 days. If longer storage is required, store and transport the specimen at -20° C for up to 30 days. |
| Causes for Rejection: | Improperly labeled, incorrect container, contaminated, insufficient quantity, incorrect/delay in transport. |
| Reference Range: | 5.0 - 20.0 ng/mL |
| Additional Information: | When elimination of tacrolimus is impaired, i.e., during cholestasis, tacrolimus metabolites may accumulate, and tacrolimus concentration may be overestimated. |