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Test ID FSABI Tysabri (Natalizumab) Immunogenicity

Specimen Required

Draw blood in a plain red-top tube(s), serum gel tube(s) is acceptable. Send 1 mL serum frozen in plastic vial.

Method Name

Enzyme Linked Immunosorbent Assay (ELISA)

Reporting Name

Tysabri/Natalizumab Immunogenicity

Specimen Type


Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Frozen (preferred)
  Refrigerated  14 days

Reference Values



Day(s) Performed


Report Available

5 to 14 days

Performing Laboratory

Eurofins Viracor

Test Classification

This test was developed and its performance characteristics determined by Viracor Eurofins. It has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
FSABI Tysabri/Natalizumab Immunogenicity 49598-6


Result ID Test Result Name Result LOINC Value
Z4143 Tysabri/Natalizumab Immunogenicity 49598-6

NY State Approved