Skip to main content

Login to North West London Pathology – consumables service

If you need a new account or you have a query about your order, please telephone the pathology call centre on 0203 313 5353.

If you have forgotten your password you can reset this yourself. Please click here if you have forgotten your password.

Results Line and Enquiries

0203 313 5353

Vitamin D 1,25-dihydroxy

Category Biochemistry
Test background

1,25-(OH)2 vitamin D3 is the active form of vitamin D and stimulates intestinal calcium/phosphate absorption, increased bone resorption.

Clinical Indications

1,25-(OH)2 vitamin D3 is occasionally used for monitoring replacement therapy in parathyroidectomised patients.
Not for monitoring vitamin D status, please request 25-OH vitamin D.

Reference range

See report

Sample & container required Serum (red top)
Sample volume 3.5 mL on ice rush to laboratory
Turnaround time Up to 6 weeks

Not currently performed in house; this is a referred test.