Test directory: Vitamin D (1,25 Dihydroxy)

Ordering Code 4990
Test Name Vitamin D (1,25 Dihydroxy)
Alias 1,25 Dihydroxycholecalciferol
1,25 OH-D
Calcitriol
1,25 Vitamin D
Preferred Specimen Serum
Preferred Container SST (Gold)
Other Specimen/Container Serum in Plain (Red)
Optimum Volume 1 mL
Handling Instructions Allow blood to clot (30 minutes) at ambient temperature
Centrifuge and separate the serum from the cells.
Transport Requirements Oahu: Ambient
Airline: Ambient
Specimen Stability Ambient: 28 Days
Refrigerated: 28 Days
Frozen: 28 Days
Rejection Criteria Insufficient quantity, Moderate gross hemolysis
Avail. Stat NO
Analytic Time Up to 2 Weeks
Methodology LC/MS/MS
Reference Lab  Quest Diagnostic Lab-NI

Reference range(s)

The reference ranges listed below are valid on this date of November 23, 2025.
Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
Vitamin D,1,25 (OH)2, Total ALL See report.
Vitamin D3, 1,25 (OH)2 ALL See report.
Vitamin D2, 1,25 (OH)2 ALL See report.