Geisinger Medical Laboratories/Geisinger Proven Diagnostics Test Catalog

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

50-G GESTATIONAL GLUCOSE, 1 HOUR

ORDERING INFORMATION:
Geisinger Epic Procedure Code: LAB1493         Geisinger Epic ID: 6690

SPECIMEN COLLECTION
Specimen type:
Plasma
Preferred collection container:
Specimen required:
1 mL aliquot of plasma; minimum 0.2 mL
Special notes:
Place specimen on ice, or centrifuge and separate plasma from cells.
Patient preparation:
Specimen collected 1 hour after 50-gram glucose challenge. Fasting not required.

SPECIMEN PROCESSING
Specimen processing instructions:
Centrifuge to separate plasma. 
Transport temperature:
Refrigerated (preferred). Room temperature also acceptable.
Specimen stability:
3 days (spun and unspun).
Rejection criteria:
Stability limits exceeded.

TEST DETAILS
Reference interval:
70-129 mg/dL
Critical values/courtesy alerts:
Glucose below 45, above 500 mg/dL
Additional information:
Test routinely performed during pregnancy.
CPT code(s):
82950
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:
Gestational glucose test 1 hour post 50 gm glucose challenge.
Methodology:
Spectrophotometric (Colorimetric)
Synonyms:
Blood sugar, GLUG, GTT
Clinical significance:
An elevated value indicates the need for a full diagnostics gestational tolerance performed in the fasting state to determine if the patient has gestational diabetes.
Doctoral Director(s:)
Hoi-Ying Elsie Yu, PhD, DABCC
Sheng-Ying (Margaret) Lo, PhD, DABCC    
Review Date: 12/24/2020

Performing Locations

Geisinger Medical Center

Performing laboratory: Automated Chemistry
Technical Lead: Jared Shepard
Frequency: Daily
Performed stat? No

Geisinger Wyoming Valley Medical Center

Performing laboratory: ATL+
Technical Lead: Sarah McGowan    
Frequency: Daily    
Performed stat? No

Geisinger Shamokin Area Community Hospital

Performing laboratory: Chemistry
Technical Lead: Anthony Cole    
Frequency: Monday-Friday    
Performed stat? No

Geisinger Bloomsburg Hospital

Performing laboratory: Chemistry
Technical Lead: Robyn Stokes  
Frequency: Daily    
Performed stat? No

Geisinger Community Medical Center

Performing laboratory: Chemistry
Technical Lead: Ann Mack, Deborah Dempsey  
Frequency: Daily    
Performed stat? No

Geisinger Lewistown Hospital

Performing laboratory: Chemistry
Technical Lead: Melissa Forsythe  
Frequency: First shift    
Performed stat?

Geisinger Jersey Shore Hospital

Performing laboratory: Chemistry
Technical lead: Brenda Shuman-Johnson    
Frequency: Daily, all shifts    
Performed stat? Yes
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