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Test #


Test CPT Codes


COVID-19 IgM Antibody Testing

Test Type

Diagnostic Immunology

Test Disease / Components

COVID-19 Infection

Test Technology

Chemiluminescent Immunoassay (CLIA)

Clinical Utility


Test Specimen


  • Serum Separator Tube preferred

  • Absolute minimum volume: 1mL

About This Test

  • Positive results to antibodies against SARS-CoV-2 are generally indicative of an individual’s current or prior infection with the COVID-19 virus, however, the duration of these antibodies remaining in circulation has not yet been established.

  • These test results should always be considered in the context of a patient’s clinical history, physical examination, epidemiologic exposures and vaccination history before making the final diagnosis.

  • IgM isotype antibodies develop within 5 to 7 days and indicates recent infection.

Storage, Stability & Shipping


  • Label specimen with patient's name and date of birth

  • Complete requisition form with necessary information

  • Ambient, 48 hours; Refrigerated, 2 weeks; Frozen, 1 year (avoid repeated freeze/thaw cycles)


  • Specimen viability decreases during transit

  • Ship ambient within 48 hours; Ship refrigerated or frozen samples on ice packs

Turnaround Time (TAT)

8 days

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