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Specimen Collection Manual and Test Catalog

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PTH

Geisinger Epic Procedure Code:  LAB2950    Geisinger Epic ID:  14388

SPECIMEN COLLECTION
Specimen type: 

Serum or plasma


Preferred collection container: 
Specimen required: 

2 mL serum or plasma; minimum 0.5 mL


Special notes: 

For intraoperative PTH: please use PTH, Intraoperative test (LAB2953).



SPECIMEN PROCESSING
Processing instructions: 

Allow serum to clot. Centrifuge to separate serum or plasma within 2 hours of collection.


Transport temperature: 

Refrigerated (preferred). Room temperature or frozen specimens also acceptable.


Specimen stability: 

Room temperature: Serum 8 hours. Plasma 2 days. Refrigerated: Serum 2 days. Plasma 3 days. Frozen: 6 months.


Rejection criteria: 

Hemolysis or lipemia.



TEST DETAILS
Reference interval: 

18-59 pg/mL


CPT code(s):  83970
Note: The billing party has sole responsibility for CPT coding.  Any questions regarding coding should be directed to the payer being billed.
The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.

Methodology: 
Electrochemiluminescence
Synonyms: 

PTH, Intact Human PTH. Parathryroid hormone


Clinical significance: 

This assay is useful in making the diagnosis of primary hyperparathyroidism


Doctoral Director(s): 
Hoi-Ying Elsie Yu, PhD, DABCC, FADLM
Sheng-Ying (Margaret) Lo, PhD, DABCC
Review Date:  06/26/2025

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