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PTH Intact - Routine

Test Code
PTH INTACT-ROUT


Alias/See Also
Chemistry


Preferred Specimen
Serum from BLOOD (PLAIN RED)


Transport Temperature
Refrigerated - see specimen stability section for more details


Specimen Stability
Refrigerated (2-8°C): 2 days
Frozen (-20°C or colder): 6 months off clot/gel


Reference Range
10 - 65 pg/mL

PTH should be interpreted in context of calcium or ionized calcium.


Clinical Significance
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.


Performing Laboratory
Test performed at West Roxbury Chemistry Lab
Contact: Jonathan Dryjowicz-Burek 857-203-5973


Last Updated: November 21, 2025


The CPT Codes provided in this document 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 payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.