Complete Blood Count

A complete blood count (CBC) is a test that measures the amount of different types of blood cells in your body. It’s often used to help diagnose and monitor conditions such as anemia, infection, and blood disorders. The CBC test measures the following components of your blood:

White blood cells: White blood cells are part of your immune system, which helps your body fight infection.

Red blood cells: These cells carry oxygen from your lungs to the rest of your body.

Hemoglobin: Hemoglobin is an iron-containing protein in red blood cells that carries oxygen.

Hematocrit: This is the percentage of red blood cells in your blood.

Platelets: Platelets help your body form clots to stop bleeding.

Your doctor may recommend a CBC test if you have signs and symptoms of anemia, infection, or another blood disorder. A CBC can also help diagnose and monitor conditions such as cancer, HIV/AIDS, and autoimmune diseases. The CBC test is performed by drawing a sample of your blood and sending it to a laboratory for analysis. Results usually take a few days to a week. Your doctor will interpret the results and discuss them with you