Find Locations
For hours, walk-ins and appointments.Synonyms
- Differential
- Leukocyte/WBC Count, Peripheral Blood
- WBC With Diff, Total and Differential
- White Blood Cell Morphology
Test Includes
Total WBC plus relative (%) and absolute counts of all white blood cell types
Expected Turnaround Time
Within 1 day
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Related Documents
Specimen Requirements
Specimen
Whole blood
Volume
Tube fill capacity
Minimum Volume
0.5 mL (500 μL for pediatric microtainer capillary tubes; fill tube to capacity.)
Container
Lavender-top (EDTA) tube
Collection
Invert tube 8 to 10 times immediately after tube is filled at the time of collection.
Storage Instructions
Maintain specimen at room temperature for 24 hours; refrigerate for 48 hours.
Stability Requirements
Temperature | Period |
|---|---|
Room temperature | 1 day |
Refrigerated | 3 days |
Frozen | Unstable |
Freeze/thaw cycles | Unstable |
Causes for Rejection
Hemolysis; clotted specimen; tube not filled with minimum fill volume; specimen diluted or contaminated with IV fluid; specimen drawn in any anticoagulant other than EDTA; transfer tubes with whole specimen received with plasma removed (plasma used for other testing); improper labeling; samples more than 72 hours old
Test Details
Use
Determine quantitative variations in white cell numbers and types
Methodology
Automated cell counter
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 015173 | Differential/Total WBC Count | 005025 | WBC | x10E3/uL | 6690-2 | |
| 015173 | Differential/Total WBC Count | 015107 | Neutrophils | % | 770-8 | |
| 015173 | Differential/Total WBC Count | 015123 | Lymphs | % | 736-9 | |
| 015173 | Differential/Total WBC Count | 015131 | Monocytes | % | 5905-5 | |
| 015173 | Differential/Total WBC Count | 015149 | Eos | % | 713-8 | |
| 015173 | Differential/Total WBC Count | 015156 | Basos | % | 706-2 | |
| 015173 | Differential/Total WBC Count | 115398 | Immature Cells | N/A | ||
| 015173 | Differential/Total WBC Count | 015909 | Neutrophils (Absolute) | x10E3/uL | 751-8 | |
| 015173 | Differential/Total WBC Count | 015917 | Lymphs (Absolute) | x10E3/uL | 731-0 | |
| 015173 | Differential/Total WBC Count | 015925 | Monocytes(Absolute) | x10E3/uL | 742-7 | |
| 015173 | Differential/Total WBC Count | 015933 | Eos (Absolute) | x10E3/uL | 711-2 | |
| 015173 | Differential/Total WBC Count | 015941 | Baso (Absolute) | x10E3/uL | 704-7 | |
| 015173 | Differential/Total WBC Count | 015108 | Immature Granulocytes | % | 71695-1 | |
| 015173 | Differential/Total WBC Count | 015911 | Immature Grans (Abs) | x10E3/uL | 53115-2 | |
| 015173 | Differential/Total WBC Count | 015945 | NRBC | % | 58413-6 | |
| 015173 | Differential/Total WBC Count | 015180 | Hematology Comments: | 18314-5 |
| Reflex Table for Immature Cells | ||||||
|---|---|---|---|---|---|---|
| Order Code | Order Name | Result Code | Result Name | UofM | Result LOINC | |
| Reflex 1 | 115399 | Immature Cells | 115400 | Bands | % | 35332-6 |
| Reflex Table for Immature Cells | ||||||
|---|---|---|---|---|---|---|
| Order Code | Order Name | Result Code | Result Name | UofM | Result LOINC | |
| Reflex 1 | 115399 | Immature Cells | 115401 | Metamyelocytes | % | 28541-1 |
| Reflex Table for Immature Cells | ||||||
|---|---|---|---|---|---|---|
| Order Code | Order Name | Result Code | Result Name | UofM | Result LOINC | |
| Reflex 1 | 115399 | Immature Cells | 115403 | Myelocytes | % | 26498-6 |
| Reflex Table for Immature Cells | ||||||
|---|---|---|---|---|---|---|
| Order Code | Order Name | Result Code | Result Name | UofM | Result LOINC | |
| Reflex 1 | 115399 | Immature Cells | 115404 | Promyelocytes | % | 26498-6 |
| Reflex Table for Immature Cells | ||||||
|---|---|---|---|---|---|---|
| Order Code | Order Name | Result Code | Result Name | UofM | Result LOINC | |
| Reflex 1 | 115399 | Immature Cells | 115405 | Blasts/blast like cells | % | 26498-6 |
| Reflex Table for Immature Cells | ||||||
|---|---|---|---|---|---|---|
| Order Code | Order Name | Result Code | Result Name | UofM | Result LOINC | |
| Reflex 1 | 115399 | Immature Cells | 115406 | Megakaryocytes | % | 19252-6 |
| Reflex Table for Immature Cells | ||||||
|---|---|---|---|---|---|---|
| Order Code | Order Name | Result Code | Result Name | UofM | Result LOINC | |
| Reflex 1 | 115399 | Immature Cells | 115265 | Other, Lineage Uncertain | % | 55433-7 |
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The LOINC® codes are copyright © 1994-2021, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf