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Full blood count with differential and platelet count (automated hematology profile)

Published: August 9, 2026Updated: August 16, 2026

This test measures several key components of your blood, including red blood cells, white blood cells, and platelets. It also breaks down white blood cells into different types (differential count).

Quick summary

["A CBC helps doctors assess your overall health, detect infections, anemia, or blood disorders."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
101386-1
Short code
RET gene Del+Dup + Full Mut Anl Bld/T
Synonyms
RET gene Del+Dup + Full Mut Anl Bld/T
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
molgen
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

What Does a CBC Measure?

Your blood is analyzed for three main groups of cells: red blood cells (RBCs), white blood cells (WBCs), and platelets. The differential count further categorizes WBCs into neutrophils, lymphocytes, monocytes, eosinophils, and basophils, which can help identify specific types of infections or immune responses.

Red Blood Cells (RBCs) and Hemoglobin

RBCs carry oxygen to your body’s tissues. Low levels may indicate anemia or blood loss, while high levels could suggest conditions like dehydration or polycythemia.

White Blood Cells (WBCs) and Differential Count

WBCs fight infections and inflammation. The differential helps identify if certain types (e.g., high neutrophils) point to bacterial infections or other conditions like allergies or autoimmune diseases.

Platelets

Platelets help your blood clot. Low platelet counts may increase bleeding risk, while high counts could signal clotting disorders or other health issues.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

A CBC is often the first test doctors use to diagnose or monitor conditions like anemia, infections, blood cancers (e.g., leukemia), or bleeding disorders. It also helps track responses to treatments, such as chemotherapy or blood transfusions.

Short name

CBC with diff

Frequently asked questions

Why might I need this test?
You may need a CBC if you have symptoms like fatigue, frequent infections, easy bruising, pale skin, or unexplained weight changes. Doctors also order it routinely during check-ups or before surgeries.
How is this test done?
A small blood sample is taken from a vein in your arm. The blood is analyzed automatically in a lab to count and categorize cells. Results are usually ready within a few hours to a day.
What are typical results?
Results are compared to standard ranges, but they can vary by lab. Your doctor will discuss any abnormal findings and what they might mean for you.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy