Days Set Up
Monday - Friday
Analytic Time

48 hours

Test Updated:


Direct Immunofluorescence

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Test Overview

Test Methodology

Direct Immunofluorescence

Test Usage
Reference Range

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

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Specimen Requirements

Collection Offsite

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.

Minimum Volume

Billing Information

CPT Code
88346-TC 1st Ab, 88350-TC ea addl Ab
Pro Fee Code

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Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.