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Specimen Collection Manual and Test Catalog

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TSH

Geisinger Epic Procedure Code:  LAB3204    Geisinger Epic ID:  7020

SPECIMEN COLLECTION
Specimen type: 

Plasma or serum


Preferred collection container: 
Alternate collection container: 
3 mL green/black top lithium heparin tube
Specimen required: 

2 mL of serum or plasma; minimum 0.5 mL.



SPECIMEN PROCESSING
Processing instructions: 

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


Transport temperature: 

Refrigerated (preferred) or frozen.


Specimen stability: 

Refrigerated: 7 days. Frozen: 1 month.


Rejection criteria: 

Stability limits exceeded.



TEST DETAILS
Reference interval: 

0.27-4.2 uIU/mL
 


Additional information: 

Specimens containing human anti-mouse antibodies may affect results.


CPT code(s):  84443
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.

Test includes: 

Thyroid stimulating hormone (TSH).


Methodology: 
Electrochemiluminescence Immunoassay
Synonyms: 

Thyrotropin, Thryoid stimulating hormone, TSH, High sensitivity TSH


Clinical significance: 

Decreased in primary hyperthyroidism; increased in primary hypothyroidism.


Doctoral Director(s): 
Hoi-Ying Elsie Yu, PhD, DABCC, FADLM
Sheng-Ying (Margaret) Lo, PhD, DABCC
Review Date:  12/27/2024

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