Geisinger Medical Laboratories/Geisinger Proven Diagnostics Test Catalog

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

PHENYLALANINE

ORDERING INFORMATION:
Geisinger Epic Procedure Code: LAB2842         Geisinger Epic ID: 19728

SPECIMEN COLLECTION
Specimen type:
Plasma
Preferred collection container:
Specimen required:
0.4 mL aliquot of plasma; minimum 0.2 mL.
Special notes:
Please specify on the request form the patient's age (required for correct reference range). Provide age, a brief clinical history, tentative diagnosis, and the therapy over the last 3 days (drugs, X-ray, infant formula, diet).
Patient preparation:
Collect specimen after an overnight fast (or at least 4 hours after a meal), if possible. Nonfasting samples are acceptable for pediatric patients.

SPECIMEN PROCESSING
Specimen processing instructions:
Centrifuge 10 minutes at 3000 rpm. Centrifuge within 30 minutes of collection. Immediately separate plasma specimens from the cells into clean, plastic, screw-capped vial(s). Aliquot 2 mL of plasma. 
Transport temperature:
Frozen (preferred) or refrigerated.
Specimen stability:
Room Temperature: Unacceptable. Refrigerated: 7 days. Frozen: 30 days.
Rejection criteria:
Specimens transported at room temperature.

TEST DETAILS
Reference interval:
Adult: 40-74 umol/L
Pediatric:
0-30 days: 30-79 umol/L
31 days-23 months: 31-92 umol/L
2-17 years: 38-86 umol/L
Additional information:
None.
CPT code(s):
84030
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:
Phenylalanine
Methodology:
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Synonyms:
PHENYL, PKU
Quest test code 37356

Performing Locations

Quest Diagnostics

Technical Lead: Michael Weaver    
Frequency: Tuesday, Thursday morning    
Performed stat? No
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