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PTH, Intact and Calcium
The Intact PTH is the recommended initial assay for the differential diagnosis of calcium-related abnormalities
2 mL frozen serum collected in a SST® (red-top) tube
Spin to separate serum and transfer to plastic screw-cap vial. Freeze immediately and submit to laboratory frozen. Do not submit glass tubes.
Room temperature: Unacceptable
Frozen: 6 months
Gross hemolysis • Plasma • Intact PTH specimens received room temperature or refrigerated
PTH: Immunoassay (IA) • Calcium: Spectrophotometry (SP)
Quest Diagnostics Nichols Institute
33608 Ortega Highway
San Juan Capistrano, CA 92675-2042
Set up: Tues-Sat; Report available: 1-2 days
|Age||Male (mg/dL)||Female (mg/dL)|
|<6 Years||Not established|
|6-9 Years||9-59 pg/mL|
|10-13 Years||11-74 pg/mL|
|14-17 Years||9-69 pg/mL|
|>17 Years||14-64 pg/mL|
|Hypoparathyroidism||Low or Low Normal||Low|
|Primary||Normal or High||High|
|Secondary||High||Normal or Low|
|Hypercalcemia||Low or Low Normal||High|
The assay is useful in making the diagnosis of primary hyperparathyroidism, secondary hyperparathyroidism, and a differential diagnosis of hypercalcemia. The assay helps in distinguishing hypercalcemia cause by either primary hyperparathyroidism or malignant disease.
Immunoreactive PTH, Sandwich PTH Assay, PTH Whole Molecule, Intact Hormone, Monogram
The Result and LOINC information listed below should not be used for electronic interface maintenance with Quest Diagnostics. Please contact the Quest Diagnostics Connectivity Help Desk for more information at 800-697-9302.NOTE: The codes listed in the table below are not orderable Test Codes.
|Result Name||LOINC Code||Component Name|
Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.
The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.
LOINC assignment is based on a combination of test attributes, including the method used by the performing laboratory. For tests not performed by Quest Diagnostics, codes are assigned by the performing laboratory.
* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.