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BCH Order Code NF4FS Neurofascin-155 IgG4, Flow Cytometry, Serum

Specimen Required

Collection Container/Tube:

Preferred: Red top

Acceptable: Serum gel

Specimen Volume: 2 mL

Useful For

Evaluating patients with an underlying demyelinating neuropathy


Diagnosis of a neurofascin-155 IgG4 mediated neuropathy

Method Name

Flow Cytometry

Reporting Name

Neurofascin-155 IgG4, S

Specimen Type


Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Refrigerated (preferred) 28 days
  Frozen  28 days
  Ambient  72 hours

Reference Values


Day(s) Performed

Monday, Friday

Report Available

5 to 8 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test was developed, and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
NF4FS Neurofascin-155 IgG4, S In Process


Result ID Test Result Name Result LOINC Value
614591 Neurofascin-155 IgG4, S In Process


If not ordering electronically, complete, print, and send a Neurology Specialty Testing Client Test Request (T732) with the specimen.