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Labcorp Oklahoma, Inc.
Test Directory


Index:

Ammonia

Order Name AMMONIA
Test Number: 2000300
Revision Date 07/01/2020
Test Name Methodology LOINC Code
Ammonia
GLDH/UV 16362-6 
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 1 mL (0.5) Plasma Lithium Heparin PST (Light Green Top) Frozen
Alternate 1 1 mL (0.5) Plasma EDTA (Lavender Top) Frozen
Instructions Place specimen on ice immediately after drawing, separate plasma and freeze within 30 minutes or deliver to lab immediately.
Stability: 2 hour delay permissible if plasma is separated from cells and kept on ice or refrigerated.
Freeze specimen if not going to be tested within 2 hours of collection. Frozen stability 3 weeks.
GENERAL INFORMATION
Testing Schedule Daily 
Expected TAT 1-2 days  
Clinical Use Useful in the diagnosis and treatment of advanced liver disease and hepatic encephalopathy and Reye's Syndrome. 
CPT Code(s) 82140
Lab Section Chemistry