Understanding a CBC panel (educational only)

What is a complete blood count measuring?

A complete blood count (CBC) measures the cells circulating in blood: red blood cells that carry oxygen, white blood cells involved in immune response, and platelets involved in clotting.

Phoenix does not interpret laboratory results. Reference ranges vary by laboratory, and a value outside a range does not by itself mean anything is wrong. Only your clinician can interpret your results.

Key points

Ranges differ between laboratories — always read the range printed on your own report.
Trends over time are usually more informative than a single value.
Ask your clinician what they were looking for when they ordered it.

Questions to ask

What were you looking for with this test?
Does anything here change my care?
When should it be repeated?

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Sources & transparency

Complete Blood Count (CBC)(opens in a new tab)
MedlinePlus (U.S. National Library of Medicine)
Retrieved by Phoenix Jul 10, 2026

Last reviewed:: Jul 15, 2026
Next review due:: Jan 15, 2027
Editorial owner:: Phoenix Health Compass Editorial Team
Medical reviewer:: Not yet clinically reviewed