Test Overview

Test Methodology

Colorimetric Enzyme Assay

Test Usage

Lactic acid in CSF normally parallels blood levels. With alterations in the CNS, CSF lactic acid levels change independently of blood values. Unlike bacterial meningitis, viral meningitis lactic acid levels in CSF are not usually elevated.

Reference Range*

No established reference range.

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

Test Details

Days Test Performed

Daily, 24 hours

Analytic Time

2 hours

Soft Order Code


MiChart Code

Lactic Acid, CSF



Lactate Spinal Fluid

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Chemical Pathology

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Specimen Requirements

Offsite Collection Instructions

Collect spinal fluid and place in a sterile tube or container. Freeze.

Normal Volume

1 mL CSF

Minimum Volume

0.5 mL CSF

Additional Information

This test has not been cleared nor approved by the U.S. Food and Drug Administration.

Billing Information

Fee Codes

CPT Code




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