Test Overview
Test Methodology

Direct and indirect peroxidase and avidin-biotin complex peroxidase methods.

Test Usage

To detect the presence of specific antigens in tissues or in cytology specimens.

Reference Range *

Interpretative report provided.

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

Test Limitations

Ability to detect antigens depends on availability of specific antisera and ability of antigens to withstand fixation or embedding.

Test Details
Days Set Up
Monday - Friday, 8:00am - 4:30pm
Analytic Time

3 - 5 days

  • PRA
  • ERP
  • PRP
  • Estrogen IHC
  • Progesterone IHC
  • IPOX
  • Immunohistochemistry (IHC)
  • Tumor Markers
  • Lymphoid Markers
  • Immunophenotyping
  • Estrogen Receptor Protein, Paraffin Sections
  • Progesterone Receptor Protein, Paraffin Sections
  • ERPR
  • ER/PR
  • Consult
  • Surgical
IPOX/Muscle Lab
Specimen Requirements
Collection Instructions

If requesting IHC stains as part of a consultation, please submit the request using the MLabs Anatomic Pathology Consultation requisition: check the box Pathology Consultation and the box Special Stain(s) Requested and indicate the specific stain(s) that are needed. Contact the MLabs Client Services Center at 800-862-7284 for any special instructions.

Additional Information

Test includes pathologist interpretation of results billed as a separate additional charge or billed to the client as a global fee; there is no pro fee for tech only (TO) cases. Generally, immunohistochemistry/immunoperoxidase procedures serve as an adjunct to surgical histopathology to identify the origin or type of neoplasm, or to detect specific antigens in normal tissues at the light microscope or electron microscope levels. For additional markers or uses contact the MLabs Client Services Center.

CPT Code
88342-TC 1st Ab, 88341-TC ea addl Ab
Fee Code
RA004 1st Ab, RA005 ea addl Ab
Pro Fee CPT
88342-26 1st Ab, 88341-26 ea addl Ab