Good to knowOne result rarely tells the whole story. Your provider looks at your results together with your symptoms, exam, and other tests.
What the test is
It helps sort out the cause of anemia.
Why it's done
- Looking into the cause of anemia
- Checking recovery after bleeding or treatment for iron or B12 deficiency
Getting ready and what happens
- No special preparation is needed.
How the test is done
- A health worker cleans the skin, puts a band around your arm, and draws blood from a vein with a small needle. It takes a few minutes.
What the results mean
| Result | Typical range for adults |
|---|---|
| Reticulocytes | About 0.5% to 2.5% of red cells |
Normal ranges vary from lab to lab and can differ by age, sex, and pregnancy. Your report lists your lab's own range next to each result. A result a little outside the range is often not a problem.
High
The marrow is working hard to replace red cells, as after bleeding, red cell breakdown (hemolysis), or starting iron or B12.
Low with anemia
The marrow isn't keeping up, as with iron, B12, or folate deficiency, kidney disease, or marrow problems.
Questions to ask your provider
- What do my results mean for me?
- Do I need to repeat this test or have other tests?
Risks
A blood draw is very safe. You may have slight pain or a small bruise where the needle went in.
Related conditions
Related tests
Sources
Last updated 2026-11-13.