Geisinger Medical Laboratories/Geisinger Proven Diagnostics Test Catalog

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

AMMONIA

ORDERING INFORMATION:
Geisinger Epic Procedure Code: LAB1732         Geisinger Epic ID: 6457

SPECIMEN COLLECTION
Specimen type:
Plasma
Preferred collection container:
Specimen required:
1 mL aliquot plasma; minimum 0.5 mL
Special notes:
Mix well. Place specimen immediately into an ice slurry. See Processing Instructions below.

SPECIMEN PROCESSING
Specimen processing instructions:
Centrifuge (cold if possible) to separate plasma. Place specimen on ice and assay immediately. Exposure to air should be minimized. For off-campus laboratory, separate plasma immediately upon centrifugation. Freeze plasma at -20°C (-70°C is acceptable). 
Transport temperature:
Refrigerated or frozen.
Specimen stability:
Refrigerated: 2 hours. Frozen: 3 days.
Rejection criteria:
Hemolyzed specimens are not acceptable.

TEST DETAILS
Reference interval:
Ammonia (umol/L)
0 to 14 days: 56-107
15 days to < 2 years: 40-80
2 years and above: 11-35

Critical values/courtesy alerts:
Above 80 umol/L
CPT code(s):
82140
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:
Ammonia.
Methodology:
Enzymatic method with glutamate dehydrogenase
Synonyms:
NH3, AMON
Clinical significance:
Elevated blood ammonia levels have been associated with severe liver dysfunction such as hepatic encephalopathy, coma resulting from cirrhosis, severe hepatitis, Reye's syndrome, and drug hepatotoxicity. Also, elevated ammonia has been reported in cardiac failure, azotemia, and pulmonary emphysema.
Doctoral Director(s:)
Hoi-Ying Elsie Yu, PhD, DABCC
Sheng-Ying (Margaret) Lo, PhD, DABCC    
Review Date: 12/24/2020

Performing Locations

Geisinger Medical Center

Performing laboratory: Automated Chemistry
Technical Lead: Mariana Moyer, Jared Shepherd
Frequency: Daily, all shifts
Performed stat? Yes

Geisinger Wyoming Valley Medical Center

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

Geisinger Shamokin Area Community Hospital

Performing laboratory: Chemistry
Technical Lead: Anthony Cole    
Frequency: Daily, all shifts    
Performed stat? Yes

Geisinger Bloomsburg Hospital

Performing laboratory: Chemistry
Technical Lead: Robyn Stokes  
Frequency: Daily    
Performed stat? Yes

Geisinger Community Medical Center

Performing laboratory: Chemistry
Technical Lead: Ann Mack, Deborah Dempsey  
Frequency: Daily, all shifts    
Performed stat? Yes

Geisinger Lewistown Hospital

Performing laboratory: Chemistry
Technical Lead: Melissa Forsythe  
Frequency: All shifts    
Performed stat? Yes

Geisinger Jersey Shore Hospital

Performing laboratory: Chemistry
Technical lead: Brenda Shuman-Johnson    
Frequency: Daily, all shifts    
Performed stat? Yes

Geisinger South Wilkes-Barre

Technical lead: Bernadette Johnson    
Frequency: Daily, all shifts    
Performed stat? Yes
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