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Reticulocyte Count with Automated Differential (Reticulocyte Analysis)

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

This test measures the number of young red blood cells (reticulocytes) in your blood, which helps assess your bone marrow’s ability to produce new red blood cells.

Quick summary

["Reticulocytes indicate how well your body is making healthy red blood cells."]

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

Key facts at a glance

LOINC
72551-5
Short code
RFA Guided Vein CVC WO pump repair
Synonyms
RFA Guided Vein CVC WO pump repair
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
rf-angio
CPT
86430
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

Why This Test Is Done

Doctors may order a reticulocyte count to diagnose or monitor conditions affecting red blood cell production, such as anemia (low red blood cells), blood loss, or bone marrow disorders. It can also help evaluate responses to treatments like chemotherapy or iron supplements.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm or hand to draw a blood sample. If you’re concerned about discomfort, let your healthcare provider know.

What the Results Mean

Higher-than-normal reticulocyte counts may suggest your body is compensating for red blood cell loss (e.g., from bleeding or hemolysis). Lower-than-normal counts could indicate impaired bone marrow function or severe anemia. Your results will be interpreted by your doctor in the context of your overall health.

Common Conditions Monitored

This test is often used to monitor anemia types (e.g., iron-deficiency, pernicious), evaluate blood loss (e.g., from ulcers or heavy menstrual periods), or check for conditions like aplastic anemia or myelodysplastic syndromes.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Reticulocyte counts are critical for diagnosing and managing conditions where red blood cell production is disrupted. High reticulocyte percentages often point to regenerative anemia (e.g., from acute blood loss), while low counts may signal chronic bone marrow failure or nutritional deficiencies.

Short name

Reticulocyte Analysis

Frequently asked questions

Will this test affect my daily routine?
No, this is a simple blood draw—typically done during a regular doctor’s visit or lab visit. You can resume normal activities immediately after.
How long will I need to wait for results?
Results are usually available within 24–48 hours, depending on lab processing times. Your doctor will discuss them with you during your follow-up.
Can I eat or drink before this test?
You can eat normally, but avoid alcohol 24 hours before if your doctor recommends it. No fasting is required for this test.
  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