Geisinger Proven Diagnostics Test Catalog

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Performed at Geisinger Medical Center, Geisinger Wyoming Valley Medical Center, Geisinger Shamokin Area Community Hospital

Test code:
Specimen type:
Serum or plasma
Collection container:
Specimen Required:
2 mL aliquot of serum or plasma; minimum 0.2 mL.
Patient preparation:
Collect just prior to next dose.

Specimen Processing Instructions:
Allow serum to clot. Centrifuge serum or plasma at 1100-2000 g for a minimum of 10 minutes. 
Transport temperature:
Refrigerated (preferred) or frozen.
Specimen stability:
GMC, GWV: Refrigerated: 1 week. Frozen: 60 days.
GSACH: Refrigerated: 30 days.
Rejection criteria:
Stability limits exceeded.

Reference range:
Therapeutic range: 10-20 mcg/mL.
Critical Values/Courtesy Alerts:
Above 21.0 mcg/mL.
Additional information:
Significant interference with this procedure may occur in patients with antibodies induced during treatment with mouse monoclonal antibodies.
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:
Enzyme Immunoassay (EIA)
Clinical Significance:
Theophylline is used in the treatment of bronchial asthma as well as the treatment of chronic obstructive pulmonary disease and episodes of prolonged apnea in preterm infants. Theophylline levels are monitored to assure adequate therapeutic levels are achieved and to avoid toxicity.
Doctoral Director Review:
Jay Jones Ph.D.     Review Date: 02/04/2014

Performing Locations

Geisinger Medical Center

Performing laboratory: Automated Chemistry
Technical Lead: Larry Quinton
Frequency: Daily, Monday - Sunday
Performed stat? Y

Geisinger Wyoming Valley Medical Center

Performing laboratory: ATL+
Technical Lead: Melissa Whetstone    
Frequency: Daily, all shifts    
Performed stat? Y

Geisinger Shamokin Area Community Hospital

Performing laboratory: Geisinger Shamokin Area Community Hospital
Technical Lead: Donna Costello    
Frequency: Daily, all shifts    
Performed stat? Y