Tests
Complete blood count (CBC)
Complete blood count (CBC)
Measures red cells, white cells and platelets.
Sources checked · Introductory guide
On this page
What does the test do?
Hemoglobin and cell counts help assess anemia and other treatment effects.[1]
Understanding results
Total white cells and neutrophils differ; compare results over time.[1]
Before the test
Ask about preparation. If fever occurs, contact your team without waiting for results.[2]
Questions for your care team
- Which blood counts need particular attention in my case?
Sources and scope
Source documents are in English.
Entries summarize and translate linked official public sources. The source-check date records when those sources were checked; it does not indicate a clinician’s review.
- MedlinePlus · Complete Blood Count (opens in a new tab)
- NCI · Infection and Neutropenia (opens in a new tab)
General information based on official public sources. This is not a complete list of uses or side effects. Individual treatment decisions require your care team and current source documents. US-source uses do not establish local approval or reimbursement.