| Test Name: | Vitamin D 1, 25 - Dihydroxy |
| Epic Order Code: | LAB536 | | |
| CPT Code: | 82652 |
| Specimen(s) Type: | Serum, 1.0 mL |
| Acceptable Container(s): |   Tube tops are gold and red. |
| Testing Schedule: | Monday-Friday |
| Turn Around Time: | STAT: NA |
| | Routine: 48-72 hours |
| Collection Information: | No special patient preparation is required. Obtain 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, centrifuge the specimen and remove serum from the red cells. Store and transport at 2-8° C within 7 days. If longer storage is required, store and transport at -20° C for up to 6 months. |
| Causes for Rejection: | Improperly labeled, incorrect container, contaminated, insufficient volume, incorrect/delay in transport, hemolysis. |
| Reference Range: | Males: |
| | <16 years: 24-86 pg/mL |
| | > 16 years: 18-64 pg/mL |
| | Females: |
| | <16 years: 24-86 pg/mL |
| | > 16 years: 18-78 pg/mL |
| Additional Information: | This test is primarily indicated during patient evaluation for hypercalcemia and renal failure. A normal result does not rule out Vitamin D deficiency. The recommended test for diagnosing Vitamin D deficiency is Vitamin D 25-hydroxy. |