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Laboratory Test Directory



Name Method Department Units
CD45 RO/RA Flow cytometry
Core Lab, Flow Cytometry %

Battery Members

CD3, CD4, CD8, CD45, CD3/RA, CD3/RO, CD3 transitional, CD4/RA, CD4/RO, CD4 transitional, CD8/RA, CD8/RO, CD8 transitional

Specimen Requirements

Whole blood

Container Type Container Size Specimen Volume

Purple tube (EDTA)

3 mL 3 mL

Purple tube (EDTA)

Micro sample tube 0.5 mL

Room temperature - 24 hour(s)

Specimen Preparation

  • Do not centrifuge
  • Keep at room temperature
  • Transport to laboratory as soon as possible
  • Mix by gentle inversion immediately after collection
  • If using microtainer for collection, 2 full (0.5 mL) microtainers are desired

Reasons for Rejection

  • Specimen received on wrong day of week.
  • Not received within specified time frame
  • Clotted specimen
  • Refrigerated specimen
  • Wrong collection tube


This test is only performed Monday - Friday.

Specimens must be RECEIVED in the lab by 2pm Friday for testing to be performed.

Inpatient- Do not collect between 2pm Friday and noon Sunday due to stability of sample.

Outpatient- Do not collect unless your courier will deliver to Main Laboratory by 2pm Friday. Do not collect on Saturday. Samples may be collected on Sunday after noon.

Test is not setup on Saturdays, Sundays, or national holidays.(Specimens can be collected on Sunday after 12:00 p.m.(noon) unless Monday is a national holiday). If national holiday falls in the middle of the week samples must be delivered by 2pm the day before.

CPT Code

  • 88184
  • 88185 (x5)