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Test Code VD125 1,25-Dihydroxyvitamin D

Performing Laboratory

Northwell Health Laboratories


Chemiluminescence (CLIA)

Reference Values

19.9 - 79.3 pg/mL

Test Classification and CPT Coding


Day(s) and Time(s) Performed

Sunday - Saturday

Physician Office Specimen Requirements

Container/Tube: Gold topp tube

Specimen: 1.0 mL serum (0.5 mLmin)

Transport Temperature: Refrigerated


Computer Interface Code

PDM # 5901355

Useful For

As a second-order test in the assessment of vitamin D status, especially in patients with renal disease


Investigation of some patients with clinical evidence of vitamin D deficiency (eg, vitamin D-dependent rickets due to hereditary deficiency of renal 1-alpha hydroxylase or end-organ resistance to 1,25-dihydroxy vitamin D)


Differential diagnosis of hypercalcemia