Skip to Content
UW Health SMPH
American Family Children's Hospital

UW Hospital and Clinics Lab Test Directory

Test Name: Cell Count, Body Fluid

Test Code(s): BFCC / CCNT

CPT Code(s): 89051

Test Description: Test Component:

Color, turbidity, nucleated cell count, red blood cell count and differential performed from a Wright's stained cytospin.

Methodology: Manual or Impedance Count

Days Performed: Daily, 24 hours.

Turnaround Time: Stat: Cell count 1 hour.
Routine: Differential less than 24 hours. Turnaround time met unless review by a pathologist is necessary.

Specimen Requirements

Specimen: Body fluid

Collection Instructions: Preferred Collection Container:  Sterile container.
For bloody specimens, a lavender top tube is recommended.
For synovial fluids, a capped syringe is acceptable (needle must be removed before submitting to lab).

Collection Container: Preferred: See collection instructions.

Collection Volume: Preferred: 9 mL
Pediatrics: 5 mL

Sample Analyzed: Body fluid aliquot

Volume Required: Preferred: 2 mL
Pediatrics: 1 mL

Specimen Transport: Transport specimen to UWHC Core Laboratory (B4/220) immediately. Transport with coolant pack if coming from outreach location.

Unacceptable Criteria: Samples that are clotted are not acceptable.

Stability: Ambient: 8 hours
Refrigerated: 8 hours
Frozen: Not acceptable


On samples with abnormal cells, a hematopathologist's written interpretive report is issued as a separate report.

Test Limitations:

Very small sample sizes may fail to demonstrate abnormal cells.

Critical Calls: View

Additional Information:

Differential results may not be available until after pathology review. A professional fee may be associated with this test.


See separate Laboratory Test Directory entries for cell counts and differentials on spinal fluid (CSF), peritoneal fluid, pleural fluid and synovial fluid.

Body Fluid Cell Count

Back to Lab Test Directory Index