AMINO ACID PROFILE QUANTITATIVE PLASMA

General Information

HLAB/HOL Code: AAPDP
UPHSM LIS Test #: 022504
Schedule:
Testing Time: 3-6 Days
Testing Lab: Labcorp

Specimen Info
Only 1 specimen type required, unless otherwise specified

Volume: 0.5(0.25) mL Plasma
Temperature: Frozen
Tube Type: Plasma (Heparin)
Collection Info:
Preferred: Frozen plasma from green-top (sodium heparin) tube. Acceptable: Frozen plasma from green-top (lithium heparin) tube, frozen plasma from lavender-top (EDTA) tube or frozen plasma from PPT™. Frozen serum from serum separator tube (SST) or frozen serum from red-top tube will not be rejected. Note: Plasma reference ranges will be applied to all specimen types.
Separate plasma from cells. Transfer specimen to plastic transport tube before freezing. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.

Storage Instructions:  Centrifuge, remove plasma from cells, and freeze immediately.


Specimen Acceptability

Causes for Rejection: Gross hemolysis; room temperature or thawed specimen; specimens collected in yellow-top (ACD) tubes

Methods

Liquid chromatography/tandem mass spectrometry (LC/MS-MS)

Clinical Utilities

Diagnosis and monitoring of inherited aminoacidurias, organic acidurias, and urea cycle defects. May be used as a follow-up confirmatory test to some abnormal newborn screen results.

Limitations:  False-negative results can occur, especially when a patient is affected with a mild or intermittent variant of a disorder or when clinical condition or dietary treatment causes secondary changes to the profile. Results of amino acid profiling should be interpreted in the context of clinical presentation, as well as other laboratory tests.

CPT Codes

82139

* The CPT codes provided 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 payer being billed.

Reference Range

See Report