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Chloride, Cerebrospinal Fluid

CPT: 82438
Updated on 07/2/2020
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  • Cerebrospinal Fluid Chloride

Expected Turnaround Time

1 - 2 days

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Specimen Requirements


Cerebrospinal fluid (CSF)


1 mL

Minimum Volume

0.5 mL (Note: This volume does not allow for repeat testing.)


Clean sterile tube


A CSF specimen is obtained by spinal tap and should be collected in sterile tubes and submitted to the laboratory as soon as possible. Ordinarily, three samples are collected in sterile tubes, labeled sequentially as N° 1 (chemistry and immunology studies), N° 2 (microbiological examination), and N° 3 (cell count and differential). Tubes must be labeled with the patient's full name, date, time of collection, and with the number indicating the sequence in which the tubes were obtained.

Storage Instructions

Maintain specimen at room temperature.

Causes for Rejection

Improper labeling

Test Details


CSF chloride may be decreased in tuberculous and other types of meningitis.


Ion-selective electrode (ISE)

Reference Interval

118−131 mmol/L

118−131 mmol/L

118−131 mmol/L

118−131 mmol/L

118−131 mmol/L


Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
002063 Chloride, Cerebrospinal Fluid 2070-1 002063 Chloride, Cerebrospinal Fluid mmol/L 2070-1

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