LACTIC ACID, CSF

Test Code

LAB187

Quest Code

1659

CPT Codes
83605

Preferred Specimen

1 mL frozen CSF collected in a sterile plastic screw-cap container

Minimum Volume

0.5 mL

Instructions

If specimen is not clear or contains blood, centrifuge and separate supernatant fluid before freezing.

The assay manufacturer, Roche, notes that N-acetylcysteine, when administered in high concentrations (such as for treatment of acetaminophen overdose), can interfere with their assay for lactate (lactic acid), leading to falsely low results.

Transport Container

Sterile plastic screw-cap container

Transport Temperature

Frozen

Specimen Stability

Room temperature: 3 hours
Refrigerated: 24 hours
Frozen: 90 days

Methodology
Spectrophotometric

Setup Schedule

Sun-Fri

Report Available

2-6 days

Reference Range

Neonate	10-60 mg/dL
3-10 Days	10-40 mg/dL
11 Days-15 Years	10-25 mg/dL
Adult	10-22 mg/dL

Performing Laboratory

Quest Diagnostics Nichols Institute-Chantilly VA

14225 Newbrook Drive

Chantilly, VA 20151-2228

Last Updated: August 13, 2021

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.