PTH, Intact and Calcium Test
This test measures intact parathyroid hormone (PTH) in plasma together with calcium in serum. It can be ordered through Celio Health.
About this test
PTH is measured in plasma collected in an EDTA (lavender-top) tube using immunoassay, while calcium is measured separately in serum using spectrophotometry. Reporting the two together lets a clinician see how PTH and calcium relate to one another rather than reading either value alone.
Quest describes this pairing as used in diagnosing primary or secondary hyperparathyroidism, and in the differential diagnosis of hypercalcemia, including distinguishing hypercalcemia caused by primary hyperparathyroidism from that caused by malignant disease. Quest also lists this test under several names, including Intact Hormone, Immunoreactive PTH, Sandwich PTH Assay, Monogram and PTH Whole Molecule.
Test details
| Quest code | 8837 |
|---|---|
| Methodology | PTH: Immunoassay • Calcium: Spectrophotometry |
| Sample type | 1.5 mL plasma |
| Collection | Quest patient service center |
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Additional details
What this test looks at
The test reports two values together: intact PTH in plasma and calcium in serum. Quest describes the pairing as used in diagnosing primary or secondary hyperparathyroidism and in distinguishing hypercalcemia caused by primary hyperparathyroidism from hypercalcemia caused by malignant disease.
Order online and a physician order is included — no doctor's visit and no insurance needed. Your sample is collected at a Quest Diagnostics patient service center.
Laboratory results should always be interpreted by a licensed clinician who knows your health history. This page is information about a test, not medical advice.
Frequently asked questions
What does this test measure?
It measures intact parathyroid hormone (PTH) in plasma and calcium in serum, reported together.
How is the sample collected?
PTH is measured in a 1.5 mL plasma sample collected in an EDTA (lavender-top) tube; calcium is measured in serum, from the same blood draw.
Do I need to prepare for this test?
No preparation instructions are listed for this test, though people follow any instructions their ordering clinician provides.
Why are PTH and calcium measured together?
Quest lists this pairing as used in diagnosing hyperparathyroidism and in the differential diagnosis of hypercalcemia, including distinguishing hypercalcemia from primary hyperparathyroidism versus malignant disease.
Is this test known by other names?
Yes. Quest lists aliases including Intact Hormone, Immunoreactive PTH, Sandwich PTH Assay, Monogram and PTH Whole Molecule.
How much is a PTH, Intact & Calcium test?
$199, paid once at checkout. The price includes the physician's order this test requires and sample collection at a Quest patient service center.