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Quest Diagnostics Quest Diagnostics

Complete Blood Count (CBC)

Type

Blood Testing

Biomarkers

22

Duration

30 min

Results

24 hours

Comprehensive blood test to monitor or diagnose various health conditions.

This CBC test measures and evaluates the components of your blood cells, including red blood cells (RBCs), white blood cells (WBCs), and platelets. Red blood cells carry oxygen; abnormal levels can indicate anemia, malnutrition, or leukemia. White blood cells are part of the immune system; abnormal levels may signal infection. Platelets help blood clot.

Key Details

Biomarkers
15–20 markers
Fasting Required
Not required (recommended for combined panels)
Sample Type
Blood draw
Turnaround
Same day to 24 hours
Common Use
General health screening, anemia detection

Who Is This For?

Anyone seeking a general health assessment or annual checkup. People experiencing unexplained fatigue, weakness, bruising, or frequent infections. Useful as a baseline before starting new medications, monitoring existing conditions, or as part of a pre-surgical evaluation.

What's Included

Red blood cell count (RBC)
White blood cell count (WBC) with differential
Hemoglobin and hematocrit
Platelet count
Red cell indices (MCV, MCH, MCHC, RDW)
Mean platelet volume (MPV)

Preparation Required

Fasting for 10–12 hours before your appointment is recommended for accurate results (water is fine). Avoid alcohol for 24 hours and intense exercise for 12 hours before the blood draw. Morning appointments are ideal for consistent hormone and glucose readings. The blood draw typically takes 5–10 minutes.

Biomarkers Tested

22
Red blood cells detected/not detected

Presence may indicate infection, inflammation, or hemorrhage.

MCV (Mean Corpuscular Volume) fL

The average size of your red blood cells. Small cells (microcytic) suggest iron deficiency, while large cells (macrocytic) may indicate vitamin B12 or folate deficiency. Normal-sized cells with low count suggest chronic disease.

RDW (Red Cell Distribution Width) %

Measures the variation in size among your red blood cells. A high RDW means your red blood cells vary significantly in size, which can help distinguish between different types of anemia.

WBC Differential %

Classifies and measures the amounts of different types of white blood cells.

Neutrophils % %

The percentage of white blood cells that are neutrophils. Neutrophils are the most common WBC type and respond primarily to bacterial infections.

Lymphocytes % %

The percentage of white blood cells that are lymphocytes, key players in adaptive immunity including antibody production and cell-mediated immune responses.

Monocytes % %

The percentage of white blood cells that are monocytes. Monocytes are part of the innate immune system and develop into macrophages and dendritic cells in tissues.

Eosinophils % %

The percentage of white blood cells that are eosinophils. Elevated eosinophil percentages are commonly associated with allergic reactions and parasitic infections.

Basophils % %

The percentage of white blood cells that are basophils. Basophils play a role in allergic reactions by releasing histamine and other inflammatory mediators.

Thrombocytes cells/µL

Thrombocytes (Platelets) are cell fragments that help with blood clotting. Abnormal levels can indicate bleeding disorders or bone marrow issues.

Red Blood Cell Count × 10¹²/L

Measures the number of red blood cells in your blood. Red blood cells carry oxygen from your lungs to every cell in your body. Abnormal levels can indicate anemia, dehydration, or bone marrow disorders.

Haemoglobin (HGB) g/dL

The iron-rich protein in red blood cells responsible for carrying oxygen throughout your body and returning carbon dioxide to the lungs. Low haemoglobin is the primary marker for anemia and can cause fatigue, weakness, and shortness of breath.

Haematocrit (HCT) %

The percentage of your blood volume occupied by red blood cells. It reflects the balance between red blood cell production and loss, helping diagnose anemia, dehydration, and polycythemia.

MCH (Mean Corpuscular Hemoglobin) pg

The average amount of hemoglobin in each red blood cell. Low MCH indicates that red blood cells carry less oxygen than normal, commonly seen in iron-deficiency anemia.

MCHC (Mean Corpuscular Hemoglobin Concentration) g/dL

The average concentration of hemoglobin within each red blood cell. It helps differentiate types of anemia — low MCHC points to iron deficiency, while high MCHC can indicate spherocytosis.

White Blood Cell Count × 10⁹/L

Measures the total number of white blood cells, your body's primary defense against infection. Elevated levels may indicate infection, inflammation, or immune disorders, while low levels can signal bone marrow problems or autoimmune conditions.

Neutrophils absolute × 10⁹/L

The most abundant type of white blood cell, forming the first line of defense against bacterial and fungal infections. Elevated neutrophils typically indicate active infection or inflammation.

Lymphocytes absolute × 10⁹/L

Measures the number of lymphocytes, including B cells and T cells that drive adaptive immunity. Elevated levels may indicate viral infections, while low levels can signal immune deficiency or HIV.

Monocytes absolute × 10⁹/L

Measures monocytes, the largest white blood cells. They mature into macrophages in tissues, where they engulf pathogens and dead cells. Elevated monocytes can indicate chronic infection or inflammatory conditions.

Eosinophils absolute × 10⁹/L

Measures eosinophils, white blood cells involved in fighting parasitic infections and mediating allergic responses. Elevated levels are associated with allergies, asthma, parasitic infections, and certain autoimmune conditions.

Basophils absolute × 10⁹/L

The rarest type of white blood cell, involved in allergic reactions and inflammatory responses. Basophils release histamine and heparin, contributing to immediate hypersensitivity reactions.

Platelet Count × 10⁹/L

Measures the number of platelets, small cell fragments essential for blood clotting. Low platelets increase bleeding risk, while high platelets may increase clot risk. Important for monitoring clotting disorders and medication effects.

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Price
$29.00

+ $6.00 Physician Service Fee

Category
Diagnostic
Sample Type
Blood draw
Duration
30 min
Results
24 hours