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PTH-Related Protein (PTH-rP)

Test Code


CPT Code(s)


Preferred Specimen(s)

0.5 mL plasma collected in a sodium heparin (green-top) tube

Minimum Volume

0.3 mL

Collection Instructions

Sodium heparin tubes: Centrifuge the specimen as soon as possible.
Transfer the plasma to a plastic screw-cap vial. Mark the specimen type as plasma on the transport tube. Do not submit unspun tubes.

Transport Container

Plastic screw-cap vial

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 7 days
Refrigerated: 7 days
Frozen: 28 days

Reject Criteria

Whole blood



Setup Schedule

Set up: Mon, Wed, Fri; Report available: 9 days

Reference Range(s)

14-27 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.

LOINC®' Code(s)

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 NameLOINC CodeComponent Name
PTHPROPTH-RP2729-2Parathyrin related protein

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.