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CSF Glucose

Test Code
LAB185


Alias/See Also
CFGLU; Glucose, CSF


CPT Codes
82945

Instructions
2mL Cerebrospinal fluid; Minimum volume 0.5 mL in a Screw-cap container.


Specimen Stability
Refrigerate; can be frozen for 7-10 days for repeat determination.


Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Insufficient quantity; failure to follow stability requirements


Methodology
Colorimetric:The oxidation of sample glucose is catalyzed by glucose oxidase to form hydrogen peroxide and gluconate.

Reference Range
40-70 mg/dL


Clinical Significance
The most important reason for measuring CSF glucose is in the diagnosis of bacterial meningitis. A low CSF glucose (<40 mg/dL) is found in about 50% to 60% of patients with bacterial meningitis.




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.