PTH-Related Protein (PTH-rP) : 34478

Test Code
PTHP or 34478

Alias/See Also
Parathyroid Hormone Related Pepide; PTH Related Peptide; PTH Related Protein

CPT Codes

Green top (no gel) sodium heparin tube.

Transport Container
Separate the plasma from cells as soon as possible by centrifugation. Transfer 0.5 mL plasma to a Standard Transport Tube (Min: 0.3 mL).

Transport Temperature

Specimen Stability
After separation from cells: Ambient: 7 days; Refrigerated: 7 days; Frozen: 28 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Whole blood.


Setup Schedule
Tuesday - Friday

Report Available
2-3 days (From receipt at performing laboratory)

This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Reference Range
Effective 9/27/2021
11-20 pg/mL
This is a C-terminal PTH-RP assay. Elevated results may be observed in patients with renal disease.

Clinical Significance
Differential diagnosis of hypercalcemia; manage patients with solid tumors and hypercalcemia.

Performing Laboratory
Quest Diagnostics

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.