PTH-Related Protein (PTHrP)

PTH-RP, Humoral Hypercalcemia of Malignancy Factor, (PTHrP), Parathyroid Hormone-Related Peptide (PTHRP), Plasma, Parathyroid Hormone-Related Protein (PTHrP)

Test Codes

EPIC: LAB1232020, Beaker: PTH-Related, Quest: 34478

Department

Send Outs

Instructions

Pre-chill the specimen tube in a freezer prior to collection. 

Specimen Collection Criteria

Collect: One Green-top tube Sodium Heparin.

Physician Office/Draw Specimen Preparation

Centrifuge the specimen as soon as possible. Transfer the plasma to a transport tube. Mark the specimen type as plasma on the transport tube. Keep at room temperature (20-26°C or 68-78.8°F). Do not submit unspun tubes.

Preparation for Courier Transport

Transport: 0.5 mL plasma, room temperature (20-26°C or 68-78.8°F). (Minimum: 0.3 mL)

Rejection Criteria

• Whole blood.
• Specimens not collected and processed as indicated.

In-Lab Processing

Centrifuge the specimen as soon as possible. Transfer the plasma to a transport tube. Mark the specimen type as plasma on the transport tube. Do not submit unspun tubes.

Transport: 0.5 mL plasma, frozen (-20°C/-4°F or below). (Minimum: 0.3 mL) 

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 7 days
Refrigerated (2-8°C or 36-46°F): 7 days
Frozen (-20°C/-4°F or below): 28 days

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions.

Laboratory

Sent to Quest Diagnostics, Wood Dale, IL.

Performed

Tuesday – Friday.
Results available in 2-4 days.

Reference Range

11-20 pg/mL

Test Methodology

Immunoassay (IA)

Interpretation

By report.

Clinical Utility

PTH-Related Protein (PTH-rP) – Differential diagnosis of hypercalcemia; manage patients with solid tumors and hypercalcemia.

CPT Codes

83519

Contacts

Last Updated

12/19/2025