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Test ID: ENFD    
Epidermal Nerve Fiber Density Consult

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Test Classification Provides information regarding the medical device classification for laboratory test kits and reagents. Tests may be classified as cleared or approved by the US Food and Drug Administration (FDA) and used per manufacturer's instructions, or as products that do not undergo full FDA review and approval, and are then labeled as an Analyte Specific Reagent (ASR), Investigation Use Only (IUO) product, or a Research Use Only (RUO) product.

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 U.S. Food and Drug Administration.

CPT Code Information Provides guidance in determining the appropriate Current Procedural Terminology (CPT) code(s) information for each test or profile. The listed CPT codes reflect Mayo Medical Laboratories interpretation of CPT coding requirements. It is the responsibility of each laboratory to determine correct CPT codes to use for billing.

NPWT NervePath, Level IV, Wet Ts 88305-Surgical pathology, gross and microscopic examination (if appropriate)


Congo Red, NRV ST

88313 (if appropriate)


NPOS NervePath Consult, Outside Slide

88321-Consultation and report on referred slides prepared elsewhere (if appropriate)


NPSP NervePath Consult, w/Slide Prep

88323-Consultation and report on referred material requiring preparation of slides (if appropriate)


NPUP NervePath Consult, w/USS Prof

88323-26-Consultation and report on referred unstained slides  (if appropriate)


NPCHX NervePath Consult, w/Comp Rvw of Hx

88325-Consultation, comprehensive, with review of records and specimens, with report on referred material (if appropriate)


Morphometric Analysis

88356 (if appropriate)


PNS1 IHC Initial Single Antibody Stain

88342 (if appropriate)


PNS2 IHC, Each Add’l Antibody stain

88341 (if appropriate)

LOINC® Code Information Provides guidance in determining the Logical Observation Identifiers Names and Codes (LOINC) values for the order and result codes of this test.

Test IDTest Order NameOrder LOINC Code
ENFDEpidermal Nerve Fiber Density ConsultIn Process


Result IDTest Result NameResult LOINC Code
ENFDEpidermal Nerve Fiber DensityIn Process

LOINC and CPT codes are provided by the performing laboratory.