Differential, CSF

Message

If CJD is suspected - please contact the Laboratory

This is a reflex test based on the results of the CSF Cell Count and is only performed when the WBC > 5 cell/uL.

Test Code

DIFFERENTIAL,CSF

Includes

Segs %
Lymphs %
Monocyte %
Eosino %
Basophil %
Plasma cells
Blasts
Tumor cells
Bands
Siderophage
Other cells

Preferred Specimen

CSF

Transport Temperature

Refrigerate

Specimen Stability

CSF should be tested within 1 hour of collection when stored at ambient temperature. Refrigeration at 4° may help to retard cell destruction. However, because these samples are generally “hardship” samples, they will all be processed regardless of time delay with a disclaimer: “Time delay may affect results”.

Methodology
Manual, Light microscopy

Reference Range

	CSF
Neutrophils %	0-2%
Lymphocytes %	63-99%
Monocytes %	3-37%
Eosinophils (%)	0%
Basophils (%)	0%

Note: Differential reference ranges were established for CSF fluids using CLSI H56-A Body Fluid Analysis for Cellular Composition; Approved Guideline. June 2006. Clinical correlation is recommended for fluid differential results.

Performing Laboratory
Test performed in West Roxbury Hematology Labs
Contact Nolan Raymond - West Roxbury 857-203-5980

Last Updated: February 29, 2024

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.