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Test Code SALI Salicylate (Aspirin) LAB34

Test Method

Timed Endpoint Technique; Beckman DXC600


Monday through Sunday

Routine: Typically completed within 4 hours after arrival at the
testing site.

Expedite: Typically completed within 1 hours after specimen
arrives at the testing site.

STAT: Typically completed within 30 minutes after specimen
arrives at the testing site.

Useful For

Assessing toxicity

This test is NOT useful for assessing low-dose aspirin

Specimen Requirement

0.5 mL serum or plasma is required. Gel Tubes are not

CPT Code Information

Insurances following Medicare rules: G0480

80329 Analgesics, non-opioid; 1 or 2

Reference Values

Therapeutic: 15-30 mg/dL

  • Critical Value: > 40 mg/dL

LOINC Code Information

4024-6 Salicylates [Mass/Volume] In Serum Or Plasma

Additional Specimen Collection Information

Collect blood in a lithium heparin, green-top or red-top tube.
Serum and plasma gel tubes are not acceptable. Serum or plasma
should be separated from contact with the cells within 2 hours of
collection. Specimens not centrifuged within 4 hours of collection
may be rejected. Refrigerate the specimen if unable to assay within
8 hours of collection. Samples with >2+ lipemia must be cleared
prior to analysis.


  1. Patients treated with Sulfasalazime may generate a false high
    result for salicylate.
  2. Patients treated with Sulfapyridine may generate a false low
    result for salicylate.
  3. Patients treated with temozolomide may generate a false low
    result for salicylate.