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Complete Blood Count with Platelet Count (CBC with Platelet Analysis)

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

This test measures your blood’s red blood cells, white blood cells, platelets, and sometimes hemoglobin and hematocrit levels. It helps assess overall health, detect infections, anemia, or bleeding disorders.

Quick summary

["A CBC helps doctors diagnose and monitor many conditions, including infections, anemia, or blood clotting issues."]

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

Key facts at a glance

LOINC
105915-3
Short code
sp2 Bld Gram Stn
Synonyms
sp2 Bld Gram Stn
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
gram-stain
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?

A CBC evaluates several key components of your blood, including: - **Red blood cells (RBCs):** Carry oxygen to tissues. - **White blood cells (WBCs):** Fight infections and inflammation. - **Platelets:** Aid in blood clotting. - **Hemoglobin:** The protein in RBCs that transports oxygen. - **Hematocrit:** The proportion of RBCs in your blood.

Why Might You Need a CBC?

Doctors order a CBC to check for signs of: - Anemia (low RBCs or hemoglobin). - Infections (elevated WBCs). - Bleeding disorders (low platelets). - Blood loss or clotting problems.

How Is the Test Performed?

A small blood sample is drawn from a vein, usually in your arm. The sample is sent to a lab, where it’s analyzed to count and examine these blood components.

What Are Common Results?

Results may show normal ranges, or they might indicate: - Too few or too many RBCs, WBCs, or platelets. - Abnormal shapes or counts that suggest underlying health concerns.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CBC with Platelet Count

Frequently asked questions

How long does it take to get CBC results?
Results are typically available within 1–2 business days, depending on your lab’s processing time.
Can lifestyle changes affect CBC results?
Yes, diet, hydration, exercise, and certain medications (like blood thinners) can influence blood cell counts. Avoiding alcohol and smoking may help stabilize results.
What if my CBC shows abnormal values?
If your CBC shows unusual results, your doctor may recommend additional tests or treatments, such as blood transfusions, medication adjustments, or further diagnostic procedures.
  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