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Complete Blood Count with Platelet Count (Peripheral Blood)

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

This test measures your blood’s red blood cells, white blood cells, and platelets, along with a detailed count of platelets. It helps assess overall health, detect infections, bleeding disorders, or anemia.

Quick summary

["A CBC with platelet count helps diagnose and monitor blood-related conditions."]

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

Key facts at a glance

LOINC
24358-4
Short code
CBC WO Platelets Bld
Synonyms
CBC WO Platelets Bld
Category
hematology
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
150
Ref high
400
Critical range
50 N/A – 1000 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
85049
SNOMED
900000000000003003
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What Does a CBC with Platelet Count Measure?

Your blood is analyzed for three main components: red blood cells (RBCs), white blood cells (WBCs), and platelets. Platelets specifically are tiny blood cells that help prevent bleeding by clotting. The test also checks for variations in cell size and shape, which can indicate underlying issues like anemia or infections.

Why Might Your Doctor Order This Test?

A CBC with platelet count is commonly used to monitor conditions like anemia, infections, blood disorders (such as leukemia), or to check for signs of bleeding or clotting problems. It’s also part of routine check-ups or before surgeries.

How Is This Test Performed?

A small blood sample is drawn from a vein, usually in your arm. The sample is then sent to a lab where it’s analyzed using automated machines to count and examine cells. Platelets are specifically measured to ensure they’re functioning properly.

What Are Common Results and Their Meanings?

While exact values vary by lab, lower platelet counts may suggest bleeding disorders or bone marrow issues, while higher counts could indicate infections or other conditions. Red blood cell counts help identify anemia, and white blood cell counts can signal infections or immune system problems.

Reference range

Adult: 150-400 x 10^9/LN/A

Specimen: serum

No special preparation required. Stay well hydrated.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: When Platelet Counts Are Abnormal

Short name

CBC with Platelet Count

Frequently asked questions

What are the normal reference ranges for this test?
Normal reference ranges can vary by lab and are not provided here since they depend on specific lab methods and patient demographics. Your doctor will interpret results in the context of your health and symptoms. If results are outside typical ranges, further testing or evaluation may be needed.
How long does it take to get results from this test?
Results from a CBC with platelet count are typically available within 1 to 2 business days, depending on lab processing times. Your doctor will discuss the results with you during your follow-up visit.
Can I eat or drink anything before this test?
You can eat and drink normally before this test unless your doctor has specific instructions. Avoiding alcohol or certain medications may be advised, so always follow your healthcare provider’s guidance.
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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