Test Overview
Test Methodology

Direct Immunofluorescence

Reference Range *

No deposition of immunoglobulins, complement, or fibrinogen. Pathologist interpretation provided.

Test Details
Days Set Up
Monday - Friday
Analytic Time

48 hours

  • Consult
  • Surgical
  • Direct Immunofluorescence
Specimen Requirements
Collection Instructions

Any small fresh or fresh frozen unfixed renal cortical tissue is acceptable. Place biopsy material immediately into Zeus Tissue Fixative (ZTF) to prevent dehydration. Zeus Tissue Fixative is available from MLabs and a supply should be kept at the client site. Check expiration date of ZTF before use; do not use expired ZTF. Specimen in Zeus Tissue Fixative is good for at least 5 days at room temperature. DO NOT ATTEMPT TO FREEZE SPECIMENS PLACED IN ZTF.

Additional Information

Test includes pathologist interpretation of results billed as a separate additional charge or billed to the client as a global fee. Immunofluorescence on tissue other than the above may be requested through the laboratory immunopathologist (contact the MLabs Client Services Center).

CPT Code
88346-TC 1st Ab, 88350-TC ea addl Ab
Fee Code
RA007 1st Ab, RA008 ea addl Ab
Pro Fee CPT
88346-26 1st Ab, 88350-26 ea addl Ab
NY State Approved