Days Set Up
Monday - Friday, 8:00am - 5:00pm
Analytic Time

48 hours - 3 weeks

Test Updated:



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Find a Requisition

All specimens should be accompanied by a requisition.

Submitting Specimens

Learn about how to properly label and where to ship specimens.

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MLabs provides all the supplies necessary for the collection of specimens.

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Test Overview

Test Methodology
Test Usage

Diagnosis of peripheral neuropathies.

Reference Range

Interpretive report provided.

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

Specimen Requirements

Collection Onsite

The yellow "Outpatient Consultation or Refer Sheet" should be filled out at the time the biopsy is planned to be performed, signed by the physician interested in getting the pathology report, and sent to Pathology. Advise the surgeon to cut out the entire thickness of the nerve, not a single fascicle. The specimen should be 4 cm or longer. Place the specimen on a Tefla pad soaked in saline in a covered container. The specimen should be marked STAT and sent immediately. All specimens must be accompanied by the appropriate requisition form containing the patient's complete name, medical record number, service and location, physician's name and number, and pertinent clinical history.

Collection Offsite

Nerve Biopsy kits are available from MLabs and will be required in advance of the procedure. Please notify the MLABS Client Services Center at 800-862-7284 prior to sending specimen. Please complete a Muscle/Nerve/Renal Biopsy Requisition to accompany the specimen.
Advise the surgeon to cut out the entire thickness of the nerve, not a single fascicle and to avoid traumatizing the nerve. The specimen should be 4 cm or longer. Place the specimen on a Tefla pad soaked in saline in a covered container. Wrap the container in paper towels and place on wet ice in a Styrofoam container. Mark "STAT" and send to MLabs immediately. If the specimen cannot be delivered to MLabs within 2 hours, it should be processed in the following manner: Carefully stretch the entire nerve across a piece of dry cardboard or an index card. The nerve will adhere to the dry surface immediately. If glutaraldehyde is available divide the nerve adhered to a cardboard into halves with a sharp blade (avoid teasing!). Cut off the excess of the cardboard and place one piece of the nerve with the cardboard into glutaraldehyde (for plastic embedding and teasing) and the other piece into 10% formalin (for paraffin embedding). If no glutaraldehyde (or other EM fixative) is available cut off the cardboard around the attached nerve and place the nerve with the cardboard in 10% formalin. Label the container with the patient's full name and a 2nd patient identifier. Once the biopsies have been placed in their liquid containers and the tops secured, place inside the ziploc specimen biohazard bag and seal. Wrap the ziploc bag in bubble wrap and place inside transport box. Please be careful to not contaminate the outside of the transport bags, paperwork or box when handling. For detailed collection and shipping instructions, please see

Minimum Volume

Billing Information

CPT Code
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.