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Reticulocyte Count (Autohematocrit Method)

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

This test measures the number of immature red blood cells (reticulocytes) in your blood, which helps assess bone marrow activity and red blood cell production.

Quick summary

["Reticulocytes show early signs of red blood cell production and can indicate whether your bone marrow is working properly."]

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

Key facts at a glance

LOINC
60474-4
Short code
Retics # Auto
Synonyms
Retics # Auto
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
automated-count
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 Is a Reticulocyte Count Used For?

A reticulocyte count helps doctors evaluate conditions affecting red blood cell production, such as anemia (low red blood cells) or bone marrow disorders. It can also be used to monitor treatments for blood disorders or after certain medical procedures.

How Is This Test Performed?

Blood is drawn from a vein, typically in your arm. The sample is then analyzed using an autohematocrit method, which automatically counts the reticulocytes among other blood cells.

What Does a High or Low Reticulocyte Count Mean?

A high reticulocyte count may suggest your body is producing more red blood cells than needed, possibly due to anemia or other conditions stimulating bone marrow activity. A low count could indicate insufficient red blood cell production, such as in certain types of anemia or bone marrow failure.

Common Reasons for Testing

Doctors may order this test if you have symptoms of anemia (fatigue, pale skin, shortness of breath), if your previous blood tests show abnormal red blood cell counts, or if you’re undergoing treatment for a blood-related condition.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Retic Auto

Frequently asked questions

Why might my doctor want to check my reticulocyte count?
Your doctor may use this test to determine if your bone marrow is responding to treatments for anemia, to diagnose conditions affecting red blood cell production, or to assess the effectiveness of blood transfusions or other therapies.
What are the typical reference ranges for reticulocyte counts?
Reference ranges vary by lab and age, but generally, reticulocyte counts are expressed as a percentage of total red blood cells. Your specific range will be provided by your healthcare provider.
Can reticulocyte counts change with diet or supplements?
Dietary factors like iron, vitamin B12, or folate can indirectly affect red blood cell production, but they don’t directly influence reticulocyte counts. Always discuss any supplements or changes in diet with your doctor.
  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