Vitamin D, 1,25-Dihydroxy
- CPT Code: 82652
- LOINC: 1649-3
- Specimen Type: red or gel clot
- Frequency: Setup: Mon-Fri; analytic time 2 days
- Instructions: 1.5mL serum from red or gel clot. Refrigerate. 4 hour fast preferred.
- Text: Useful as second order test in assessment of VIt D status, especially in patient with renal disease. Differential diagnosis of hypercalcemia.
Order 25OHD on non-renal patients.
- Methodology: Extraction/Liquid Chromatography-Tandem Mass Spectrometry