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UW Health SMPH

UW Hospital and Clinics Lab Test Directory

Test Name: WBC Differential, Stem Cell, Peripheral Blood

Test Code(s): SCD1 / HCSCD1

CPT Code(s): 85004

Methodology: Flow Cytometry, Impedance, and where applicable, Manual Microscopy

Days Performed: Daily, 24 hours.

Turnaround Time: Stat: 1 hour.
Routine: 4 hours.

Specimen Requirements

Specimen: Stem cell, peripheral blood

Collection Instructions: Place specimen in a tube with no anticoagulants. DO NOT place specimen in a red-top tube as it contains clot activators.

Collection Container: Preferred: See collection instructions.

Collection Volume: Preferred: 1 mL
Pediatrics: 1 mL

Sample Analyzed: Stem cell, peripheral blood

Volume Required: Preferred: 1 mL
Pediatrics: 1 mL

Specimen Transport: Transport specimen at ambient temperature to UWHC Core Laboratory (B4/220) immediately.

Unacceptable Criteria: Clotted specimens or specimens collected in red-top tubes (which contain clot activator) are not acceptable.

Stability: Ambient: 4 hours
Refrigerated: Not acceptable
Frozen: Not acceptable





Stem cell, Stem cells, PBSC, Peripheral blood stem cells

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