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Test Compendium

2044: AMMONIA, PLASMA

Test Code

  • 2044

Test Synonym

  • Ammonia, Plasma, NH4

Minimum Volume

  • 0.5 mL

Specimen Requirements

  • Plasma

Container

  • Transfer Tube- Frozen- Plasma

Storage

  • Frozen

Turn Around Time

  • 3 days

CPT Codes

  • 82140
    *The CPT codes provided are based on AMA guidelines and are provided for informational purposes only. CPT coding is the responsibility of the billing entity. Please direct any questions regarding the CPT coding to the payer being billed.

Special Instructions

  • 1mL FROZEN EDTA Plasma - STRICT FROZEN

Additional Information

  • Tube must be filled completely and kept tightly stoppered at all times. Mix well. Specimen must be placed on ice immediately. Separate plasma from cells within 15 minutes of collection. Patient should NOT clench fist. 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. Avoid contamination of samples by ammonia from smoking or traffic in the laboratory or patient's room, glassware, or water. 1mL Frozen Plasma from Lavender-top (EDTA) tube; EDTA is the only acceptable anticoagulant.

Specimen Stability

  • AMBIENT: Unstable, REFRIGERATED: Unstable, FROZEN: 14 days