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22563 Differential, Manual (WBC) Only

Differential, Manual (WBC) Only
Test Code: DIF
Synonyms/Keywords
Diff, Peripheral Smear​
Test Components
Percent/absolute Neutrophils, Lymphocytes, Monocytes, Eosinophils, and Basophils, and any abnormal nucleated cells present, including blasts and NRBC's. RBC and platelet morphology also included.​
Useful For

Screening to identify the presence of disease and aid in diagnosis.​

 RESTRICTED USE:

This test is not available except for the following branches that are still valid for ordering these codes (valid within Lab Order Manager):
63 – Outreach – will set up as Marshfield performable codes
74 – Our Lady of Victory
77 – Good Samaritan Hospital
79 - MMG-Merrill (performed at Good Samaritan)
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
No​ Whole Blood​ EDTA Lavender Top Tube (LTT)​ EDTA Pink Top Tube (PTT)​ 2 mL​ One lavender top micro collection tube or 1.0 mL in 3 mL lavender​ One lavender top micro collection tube with 0.5 mL​
Collection Processing Instructions
Invert specimen at least 5-6 times in order to facilitate mixing and prevent coagulation.
 
Prepare blood smear as soon as possible, preferably within two hours of collection, up to 24 hours, label with computer generated label or use pencil to label with patient's full name and date. Store slides at room temperature.​
Specimen Stability Information
Specimen Type Temperature Time
Whole blood​ Ambient​ <24 hours​
Whole blood​ Refrigerated​ <48 hours​
Whole blood​ Refrigerated​ >48 hours may be reported with additional comments​
Rejection Criteria
Clotted
Grossly Hemolyzed​
Diluted with IV or tissue fluid​
Frozen​
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Marshfield​ ​Monday through Sunday​ ​Less than 2 hours​ Manual Light Microscopy ​​
Reference Range Information
Performing Location Reference Range
Marshfield​ See Table:
Manual Differential Ranges​
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
85007​ ​ ​ ​ ​
Synonyms/Keywords
Diff, Peripheral Smear​
Test Components
Percent/absolute Neutrophils, Lymphocytes, Monocytes, Eosinophils, and Basophils, and any abnormal nucleated cells present, including blasts and NRBC's. RBC and platelet morphology also included.​
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
No​ Whole Blood​ EDTA Lavender Top Tube (LTT)​ EDTA Pink Top Tube (PTT)​ 2 mL​ One lavender top micro collection tube or 1.0 mL in 3 mL lavender​ One lavender top micro collection tube with 0.5 mL​
Collection Processing
Invert specimen at least 5-6 times in order to facilitate mixing and prevent coagulation.
 
Prepare blood smear as soon as possible, preferably within two hours of collection, up to 24 hours, label with computer generated label or use pencil to label with patient's full name and date. Store slides at room temperature.​
Specimen Stability Information
Specimen Type Temperature Time
Whole blood​ Ambient​ <24 hours​
Whole blood​ Refrigerated​ <48 hours​
Whole blood​ Refrigerated​ >48 hours may be reported with additional comments​
Rejection Criteria
Clotted
Grossly Hemolyzed​
Diluted with IV or tissue fluid​
Frozen​
Useful For

Screening to identify the presence of disease and aid in diagnosis.​

 RESTRICTED USE:

This test is not available except for the following branches that are still valid for ordering these codes (valid within Lab Order Manager):
63 – Outreach – will set up as Marshfield performable codes
74 – Our Lady of Victory
77 – Good Samaritan Hospital
79 - MMG-Merrill (performed at Good Samaritan)
Test Components
Percent/absolute Neutrophils, Lymphocytes, Monocytes, Eosinophils, and Basophils, and any abnormal nucleated cells present, including blasts and NRBC's. RBC and platelet morphology also included.​
Reference Range Information
Performing Location Reference Range
Marshfield​ See Table:
Manual Differential Ranges​
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Marshfield​ ​Monday through Sunday​ ​Less than 2 hours​ Manual Light Microscopy ​​
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
85007​ ​ ​ ​ ​
For most current information refer to the Marshfield Laboratory online reference manual.