AMMONIA, plasma (087-0293)

AMMONIA

Colorimetric

Clinical Chemistry

Routine: 6 hours; STAT: 1 hour

Collect: Routine venipuncture. Green-topped tube (lithium or sodium heparin not ammonium heparin). 

Specimen Preparation: Place specimen on ice immediately after collection.

Storage/Transport: Centrifuge specimens and remove the plasma from the cellular material within 15 minutes of collection and keep plasma on ice.

Causes for Rejection: Gross hemolysis, improper sample handling, specimen collected in red-topped tube, specimen collected in ammonium heparin tube, improperly labeled specimen, and QNS specimen

If applicable, state clinical information that is required to be provided with specimen.

By report (Reports may vary based on instrumentation, patient age and gender)

82140

When ordering tests for which Medicare or Medicaid reimbursement will be sought, physicians should only order tests that are medically necessary for the diagnosis or treatment of the patient.  Components of the organ or disease panels may be ordered individually.  The diagnostic information must substantiate all tests ordered and must be in the form of an ICD-9 code or its verbal equivalent.