Test Overview
Test Methodology

Manual hemocytometer cell counts and manual cytospin differential preparations.

Test Usage

Cerebrospinal fluid evaluation for a variety of disease states.

Reference Range *

Nucleated Cells:
Adults: Neonates:
WBC: 0-5/uL 0-30/uL

Differential:
Lymphocytes: 40%-80%
Histiocytes: 15%-45%
Neutrophils: 0%-6%

Reference:
kjelsberg's Body Fluid Analysis. ASCP 2015

Test Limitations

A traumatic (bloody) tap may make interpretation difficult.

Test Details
Days Set Up
Daily, 24 hours
Analytic Time

CSF Fluid Count: 1 hour
CSF Differential: 24 hours

Soft Order Code
CSFCD
MiChart Code
Cerebrospinal Fluid Count and Differential
Synonyms
  • Differential Count, CSF
  • Fluid Count/Differential, CSF
  • RBC, CSF
  • Red Cell Count, CSF
  • Spinal Fluid Analysis
  • WBC, CSF
  • White Blood Cell Morphology, CSF
  • White Cell Count, CSF
  • Differential Count, CSF
  • Fluid Count/Differential, CSF
  • RBC, CSF
  • Red Cell Count, CSF
  • Spinal Fluid Analysis
  • WBC, CSF
  • White Blood Cell Morphology, CSF
  • White Cell Count, CSF
  • CSF FC
  • CSF FD
  • PATH REV F
  • HEMATOLOGY INTERPRET - FLUID
  • TYPE/#
  • APPEARANCE
  • COLOR
  • RBC/CMM
  • WBC/CMM
  • XANTHO?
  • TYPE-SLASH-TUBE NUMBER
  • BASOS
  • BLAST
  • EOSINO
  • HISTIO
  • LYMPH
  • NUC RBC
  • OTHER
  • PLASMAS
  • SEG
  • TOTAL
  • TYPE /#
  • IMPORTANT
  • BASOPHILS
  • BLASTS
  • EOSINOPHILS
  • HISTIOCYTE
  • NUCLEATED RBCS IN FLUIDS
  • OTHER UNKNOWN CELL TYPE
  • PLASMA CELLS
  • SEGMENTED NEUTROPHILS
  • TYPE-SLASH-TUBE NUMBER
  • Cerebrospinal Fluid Analysis
Laboratory
Hematopathology
Section
Hematology
STAT Availability

STAT requests for this test will be performed on a STAT basis (supervisory staff approval is not required).

Specimen Requirements
Collection Instructions

Collect specimen using aseptic technique. For optimal results, specimen should reach laboratory within 1 hr. If specimen must be stored, refrigeration is recommended. Specimen must be received within 4 hours of collection.

Special Handling

Send specimen to laboratory within 1 hour of collection.

Rejection Criteria
Specimens received in syringes or plastic red top Vacutainer® tubes containing clot activator will be rejected. Clotted specimens will not have cell counts performed, but may still have a differential performed if requested. Specimens exceeding the storage criteria will be rejected.
Red Top Tube
Red Top Tube
Normal Volume
1 mL or more
Minimum Volume
1 mL
Additional Information

Test includes fluid count and fluid differential. Test may include pathologist interpretation of results at an additional charge. By ordering this test, the clinician acknowledges that a pathologist interpretation will be performed and billed as a separate additional charge if indicated.

Billing
CPT Code
89051
Fee Code
22502
NY State Approved
No