Geisinger Medical Laboratories Test Catalog

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


Geisinger Epic Procedure Code: LAB1994             Geisinger Epic ID: 19451

Specimen type:
Serum (preferred) or plasma
Preferred collection container:
Alternate Collection Container:
6 mL pink-top K2 EDTA tube
Specimen required:
3 mL serum or plasma; minimum 1.2 mL. Please submit a separate frozen aliquot for this test. It may not be combined with any other test requiring a frozen aliquot.
Special notes:
Do not draw serum in serum separator tubes (SST). Draw sample 1/2 to 1 hour before next dose.

Specimen processing instructions:
Allows serum to clot. Centrifuge serum or plasma 10 minutes at 3000 rpm and submit 3 mL aliquot serum or plasma. 
Transport temperature:
Room temperature (preferred). Refrigerated or frozen specimen also acceptable.
Specimen stability:
Room Temperature: 1 week. Refrigerated: 2 weeks. Frozen: 1 year.
Rejection criteria:
Serum separator tubes not acceptable. Stability limits exceeded.

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:
Gas Chromatography (GC)
Thorazine, CHLRP
Quest test code 882
Clinical significance:
Chlorpromazine is a phenothiazine for treating psychosis and Tourett's syndrome. Monitoring it's level is important to optimize therapy, to avoid toxicity, and to assure compliance.

Performing Locations

Quest Diagnostics

Technical Lead: Michael Weaver    
Frequency: Set up: As needed. Report available: 8 days.    
Performed STAT? No
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