top of page
Ammonia, Plasma
Ordering Recommendation
Evaluate status of existing liver disease. Monitor treatment in patients with inborn errors of metabolism.
Methodology
Enzymatic Assay
Performed
Mon-Sat
Reported
Within 24 hours
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation:
Collect:
Green (sodium or lithium heparin). Collect on ice.
Specimen Preparation:
Separate plasma from cells and freeze within 15 minutes of draw time. Specimens need to be spun in a refrigerated centrifuge. Transfer 2 mL plasma to a standard Transport Tube. (Min: 0.25 mL)
Storage/Transport Temperature:
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.
Unacceptable Conditions:
Serum or blood. Non-frozen specimens. Specimens containing oxalate or citrate
Remarks:
Stability:
After separation from cells: Ambient: Unacceptable; Refrigerated: 2 hours; Frozen: 3 weeks (do not thaw)
Reference Interval
0-14 days
95 µmol/L or less
15 days-6 years
68 µmol/L or less
Greater than 6 years
72 µmol/L or less
Interpretive Data
Note
CPT Code
82140
Components
Component Test Code
Component Chart Name
LOINC
0020043
Ammonia, Plasma
16362-6
Aliases
NH3
Plasma ammonia level
bottom of page