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Hemogram and Differential

Test Code


CPT Code(s)

85004, 85014, 85018, 85041, 85048

Preferred Specimen(s)

Whole blood in a full EDTA (lavender-top) tube

Minimum Volume

Microtainer 500 uL
1 mL whole blood from an EDTA (lavender-top) tube

Collection Instructions

If multiple draw, collect EDTA (lavender-top) tube last. Mix by gently inverting 8 times. Traumatic tap can introduce thromboplastin and trap White Blood Cells and platelets. Refrigeration can precipitate fibrin and trap White Blood Cells and platelets. Maintain specimen at room temperature. Do not refrigerate.

Transport Container

EDTA (lavender-top) tube

Transport Temperature

Room temperature (do not refrigerate)

Specimen Stability

Room temperature: 48 hours
Refrigerated: Unstable
Frozen: Unstable

Reject Criteria

Gross hemolysis • Clotted


Electronic Cell Sizing, Sorting/Cytometry/Microscopy

Performing Laboratory

Quest Diagnostics Inc-Auburn Hills
4444 Giddings Road
Auburn Hills, MI 48326-1533

Setup Schedule

Set up: Mon-Sat (a.m. and p.m.); Report available: 1-2 days

Clinical Significance

A complete blood count is used as a screening test for various disease states including anemia, leukemia and inflammatory processes.

LOINC®' Code(s)

The Result and LOINC information listed below should not be used for electronic interface maintenance with Quest Diagnostics. Please contact the Quest Diagnostics Connectivity Help Desk for more information at 800-697-9302.

NOTE: The codes listed in the table below are not orderable Test Codes.

Result NameLOINC CodeComponent Name
30000000WHITE BLOOD CELL COUNT6690-2Leukocytes
30000100RED BLOOD CELL COUNT789-8Erythrocytes
30000400MCV787-2Erythrocyte mean corpuscular volume
30000500MCH785-6Erythrocyte mean corpuscular hemoglobin
30000600MCHC786-4Erythrocyte mean corpuscular hemoglobin concentration
30000900NEUTROPHILS770-8Neutrophils/100 leukocytes
30001100BAND NEUTROPHILS764-1Neutrophils.band form/100 leukocytes
30001110ABSOLUTE BAND NEUTROPHILS26507-4Neutrophils.band form
30001300METAMYELOCYTES740-1Metamyelocytes/100 leukocytes
30001310ABSOLUTE METAMYELOCYTES30433-7Metamyelocytes
30001500MYELOCYTES749-2Myelocytes/100 leukocytes
30001510ABSOLUTE MYELOCYTES30446-9Myelocytes
30001520PROMYELOCYTES783-1Promyelocytes/100 leukocytes
30001530ABSOLUTE PROMYELOCYTES26523-1Promyelocytes
30001700ABSOLUTE NEUTROPHILS751-8Neutrophils
30001800LYMPHOCYTES736-9Lymphocytes/100 leukocytes
30002000REACTIVE LYMPHOCYTES13046-8Lymphocytes.variant/100 leukocytes
30002110ABSOLUTE LYMPHOCYTES731-0Lymphocytes
30002200MONOCYTES5905-5Monocytes/100 leukocytes
30002400ABSOLUTE MONOCYTES742-7Monocytes
30002500EOSINOPHILS713-8Eosinophils/100 leukocytes
30002700ABSOLUTE EOSINOPHILS711-2Eosinophils
30002800BASOPHILS706-2Basophils/100 leukocytes
30003000ABSOLUTE BASOPHILS704-7Basophils
30003400BLASTS709-6Blasts/100 leukocytes
30003500ABSOLUTE BLASTS30376-8Blasts
30003600NUCLEATED RBC19048-8Erythrocytes.nucleated/100 leukocytes
30003610ABSOLUTE NUCLEATED RBC30392-5Erythrocytes.nucleated
30004200COMMENT(S)8251-1Service comment

Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

LOINC assignment is based on a combination of test attributes, including the method used by the performing laboratory. For tests not performed by Quest Diagnostics, codes are assigned by the performing laboratory.

* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.