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St. John Health System
Lab Catalog


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
Service Provided By Labcorp Oklahoma, Inc.
Lab Section Chemistry