Bone & calcium
Parathyroid hormone (intact)iPTH
Calcium-regulating hormone; central to differentiating causes of hyper/hypocalcemia.
Sample
Serum
Clinical reference range
15 to 65 pg/mL
Adult
Conv: 15–65 pg/mL
Biology
What it measures
Released from parathyroid chief cells in response to low ionized Ca via the calcium-sensing receptor.
Clinical use
Why we order it
Hyperparathyroidism (PTH inappropriately normal/high with high Ca), CKD-MBD, vitamin D deficiency.
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