Varicella-Zoster Antibody, IgM
Label Mnemonic: VZM
Epic Lab Code: LAB4230
Downtime Form: A-1a Doctor/Provider Orders - Pathology Core and Specialty Care Nursery
Commercial Mail-out Laboratory
5231 RCP
Specimen Instructions:
Parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of the acute specimens. Mark specimens plainly as "acute" or "convalescent."
Collection Medium:
Red top tube 5 mL (Clot Activator)
Preferred Minimum: 1 mL serum in a red top tube
Absolute Minimum: 0.1 mL serum in a red top tube
Rejection Criteria:
Contaminated, heat-inactivated, hemolyzed, icteric, or severely lipemic specimens.
Delivery Instructions:
Deliver to laboratory immediately after collection.
Turn Around Time:
1-5 days upon receipt at reference laboratory
Reference Range:
0.90 ISR or less: Negative-No significant level of detectable varicella- zoster virus IgM antibody.

0.91-1.09 ISR: Equivocal-Repeat testing in 10-14 days may be helpful.

1.10 ISR or greater: Positive-Significant level of detectable varicella- zoster virus IgM antibody. Indicative of current or recent infection. However, low levels of IgM antibodies may occasionally persist for more than 12 months post-infection or immunization.
Semi-Quantitative Enzyme-Linked Immunosorbent Assay
CPT Code: