Geisinger Medical Laboratories Test Catalog

Order Display Name: Geisinger Epic Procedure Code Or ID CPT Code:  


Geisinger Epic Procedure Code: LAB1322             Geisinger Epic ID: 53213

Specimen type:
Serum (preferred) or plasma
Preferred collection container:
Alternate Collection Container:
3 mL lavender-top (K2 EDTA) tube
Specimen required:
1 mL serum (preferred) or plasma; minimum 0.5 mL
Special notes:
Do not collect in gel tube.

Specimen processing instructions:
Centrifuge and aliquot. 
Transport temperature:
Refrigerated (cold packs).
Specimen stability:
Room temperature: 7 days. Refrigerated: 14 days. Frozen: 60 days.

CPT code(s):
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.
Quest test code 91290 TH/TO Ab
Clinical significance:
The Th/To is a component of the 7-2/MRP RNP. Most of the 7-2/MRP RNP is found in the GC region of the nucleolus and <1% of this snoRNP appears located in mitochondria. The Th/To antibodies are present in 10-19% of patients with limited SSc, in 11% of patients with diffuse cutaneous SSc, and in 3% of patients with primary Raynaud’s disease. Anti-Th/To antibody has been shown to be highly specific for patients with SSc. The anti-Th/To antibody detection is an in-house bioassay performed at RDL for a qualitative determination of Th/To antibody in serum by immunoprecipitation. The Th/To antibody assay will be labeled as an “Analytic Specific Reagent (ASR).

Performing Locations

Quest Diagnostics

Technical Lead: Michael Weaver    
Frequency: Set up: Varies; Report available: 11-15 days    
Performed STAT? No
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