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HelpTest Code AMMON Ammonia
Useful For
Assessing liver function, hepatic coma, advanced liver disease, inborn errors of metabolism, and in the diagnosis of Reye's syndrome.
Specimen Information
Obtain specimen using standard phlebotomy techniques.
No special patient preparation is necessary.
| Container | Specimen | Temp | Collect Vol | Submit Vol | Min Vol | Stability |
| Lithium Heparin | Plasma | On Ice | 3 mL | 1 mL | 0.5 mL | 3 hours |
| Lithium Heparin | Plasma | Frozen | 3 mL | 1 mL | 0.5 mL | 24 hours |
Place the tube on ice immediately and transport to the lab (within 15 minutes).
Centrifuge specimen in stoppered container within 15 minutes of collection. Do NOT uncap.
Reject Due To:
- Above conditions not met
- Moderate or Marked Hemolysis
- Specimen unlabeled or mislabeled
Instrumentation / Method
Ortho Vitros XT 7600 / Colorimetric
Test Schedule / Analytical Time / Test Priority
Daily / Same Day / STAT
Reference Range
9 - 30 umol/L
Note that glucose at a level of 600 can decrease ammonia concentrations between 8 - 40 umol/L.
CPT / LOINC / Order Code
| Meditech | Medent | LOINC | CPT |
| AMMON | AMMON | 16362-6 | 82140 |
| GLUS | GLUS | 2345-7 |