AMMONIA

Test Code

LAB47

Preferred Specimen

One 4.5 mL light green top tube on ice
Pediatric: One light green top microtainer on ice.

Other Acceptable Specimens

Dark green top tube on ice.

Instructions

Sample must be centrifuged and plasma separated from cells immediately following collection and stored frozen.

Transport Temperature

Frozen

Specimen Stability

Not Stable, blood tube must be placed "immediately" on ice after collection and sent to the laboratory without delay, for centrifugation within 15 minutes of collection. Refrigerated: 2 hours (plasma removed from the cells immediately following centrifugation) Frozen: 3 weeks (plasma removed from cells immediately following centrifugation)

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Specimen not received on ice will be rejected. Samples with gross hemolysis.

Methodology
Enzymatic

Setup Schedule

Sunday-Saturday

Reference Range

0-15 days: ≤105 µmol/L
16 days - 1 year: ≤80 µmol/L
1 year - 20 years: ≤65 µmol/L
20-80 years: ≤70 µmol/L
>80 years: ≤55 µmol/L

Performing Laboratory
West Virginia University Hospital, Inc.
Bluefield Pavilion Campus
Berkeley Medical Center
Barnesville Hospital
Braxton County Memorial
Camden Clark Medical Center
Camden Clark Medical Center
Fairmont Medical Center
Garrett Regional Medical Center
Harrison Community Hospital
Jackson General Hospital
Jefferson Medical Center
Princeton Community Hospital
Potomac Valley Hospital
Reynolds Memorial Hospital
Summersville Regional Medical Center
St. Joseph’s Hospital
United Hospital Center
Uniontown Hospital
Wetzel County Hospital
Wheeling Hospital

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.