Immunoglobulin A, Quantitative, Cerebrospinal Fluid

CPT: 82784
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Test Details

Synonyms

  • IgA, CSF

Use

This test may be used to evaluate the central nervous system involvement by infection, neoplasm, or primary neurological disease (ie, multiple sclerosis). A local synthesis of IgA within the CNS is most prominent in patients with bacterial infections and has special relevance in the diagnosis of tuberculous meningitis.

Methodology

Immunologic

Reference Interval

0.00−0.64 mg/dL

Specimen Requirements

Specimen

Cerebrospinal fluid (CSF)

Volume

1 mL

Minimum Volume

0.25 mL

Container

Sterile container

Storage Instructions

Room temperature

Stability Requirements

Temperature

Period

Room temperature

14 days

Refrigerated

14 days

Frozen

14 days

Freeze/thaw cycles

Stable x3

Clinical Information

Special Instructions

The third tube of a routinely obtained three-tube set of CSF should be used for CSF IgA study.

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
100115 Immunoglobulin A, Quant, CSF 2457-0 100115 Immunoglobulin A, Quant, CSF mg/dL 2457-0

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CPT Statement/Profile Statement

The LOINC® codes are copyright © 1994-2017, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf