Geisinger Medical Laboratories/Geisinger Proven Diagnostics Test Catalog

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


Sunquest Test Code:
PHEN      Geisinger Epic Procedure Code: 80184.03         Geisinger Epic ID: 14246

Specimen type:
Serum or plasma
Preferred collection container:
Specimen required:
2 mL aliquot of serum or plasma; minimum 0.2 mL.

Specimen processing instructions:
Allow serum to clot. Centrifuge serum or plasma at 1100-2000 g for a minimum of 10 minutes. Aliquot. 
Transport temperature:
Refrigerated (preferred) or frozen.
Specimen stability:
Room temperature or refrigerated: 7 days. Frozen: 1 year.
Rejection criteria:
Stability limits exceeded.

Reference interval:
Therapeutic Range: 0-12 years - 15-30 mcg/mL. Over 12 years - 15-40 mcg/mL.
Critical values/courtesy alerts:
Above 50.0 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.
Clinical significance:
Phenobarbital is an anticonvulsant used for the long-term treatment of generalized grand mal seizures and cortical focal seizures. Phenobarbital levels are monitored to assure adequate therapeutic levels are achieved and to avoid toxicity.
Doctoral Director(s:)
Hoi-Ying Elsie Yu, PhD, DABCC
Sheng-Ying (Margaret) Lo, PhD, DABCC    
Review Date: 05/10/2019

Performing Locations

Geisinger Medical Center

Performing laboratory: Automated Chemistry
Technical Lead: Mariana Moyer, Jared Shepherd
Frequency: Daily, Monday - Sunday
Performed stat? Yes

Geisinger Wyoming Valley Medical Center

Performing laboratory: ATL+
Technical Lead: Sarah McGowan    
Frequency: Daily, all shifts    
Performed stat? Yes
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