Geisinger Medical Laboratories/Geisinger Proven Diagnostics Test Catalog

Test Name: Sunquest Test Code Epic Procedure Code Or ID CPT Code:  

3 HOUR GESTATIONAL GLUCOSE TOLERANCE, 100 GM

ORDERING INFORMATION:
Sunquest Test Code:
NOCODE4              

SPECIMEN COLLECTION
Specimen type:
Plasma
Preferred collection container:
Specimen required:
1 mL aliquot of plasma for each time interval; minimum 0.2 mL
Special notes:
Specimens must be collected on a time schedule (FBS, 1-hour, 2-hour, and 3-hour). Place specimen on ice, or centrifuge and separate plasma from cells.
Patient preparation:
100 gm challenge dose of glucose, 10-16 hour fast prior to beginning test.

SPECIMEN PROCESSING
Specimen processing instructions:
Centrifuge 10 minutes at 3000 rpm. 
Transport temperature:
Refrigerated (preferred).
Specimen stability:
3 days (spun and unspun).
Rejection criteria:
Stability limits exceeded.

TEST DETAILS
Interpretation guide:
Fasting 70-94 mg/dL
1 hour 70-179 mg/dL
2 hour 70-154 mg/dL
3 hour 70-139 mg/dL
Critical values/courtesy alerts:
Glucose below 45, above 500 mg/dL
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.
Test includes:
Fasting glucose (GEFAST), 1-hour glucose (GE10), 2-hour glucose (GE20) and 3-hour glucose (GE30)
Methodology:
Spectrophotometric (Colorimetric)
Clinical significance:
This test is used for the diagnosis of gestational diabetes.
Doctoral Director(s:)
Hoi-Ying Elsie Yu, PhD, DABCC
Sheng-Ying (Margaret) Lo, PhD, DABCC    
Review Date: 11/05/2018

Performing Locations

Geisinger Medical Center

Performing laboratory: Automated Chemistry
Technical Lead: Mariana Moyer, Jared Shepherd
Frequency: Daily, all shifts
Performed stat? No

Geisinger Wyoming Valley Medical Center

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

Geisinger Shamokin Area Community Hospital

Performing laboratory: Chemistry
Technical Lead: Kelly Alleman    
Frequency: Monday-Friday. Call to be scheduled (800-695-6491)    
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 Holy Spirit Hospital

Performing laboratory: ATL+
Technical specialist: Hadeel Naghnaghieh    
Frequency: Daily, all shifts    
Performed stat? Yes

Geisinger Jersey Shore Hospital

Performing laboratory: Chemistry
Technical specialist: Brenda Shuman-Johnson    
Frequency: Daily, 1st shift    
Performed stat? Yes
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*GMC - Geisinger Medical Center; GWV - Geisinger Wyoming Valley Medical Center; GSACH - Geisinger Shamokin Area Community Hospital; GBH - Geisinger Bloomsburg Hospital;
GCMC - Geisinger Community Medical Center (Scranton); GLH - Geisinger Lewistown Hospital; GHS - Geisinger Holy Spirit; GJSH - Geisinger Jersey Shore Hospital,
GSWB - Geisinger South Wilkes-Barre