Skip to content

Myelocyte Count (Qualitative Stem Cell Production Assessment)

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

This test assesses the presence and quantity of immature white blood cells called myelocytes in your blood, which helps evaluate bone marrow function and stem cell production.

Quick summary

["This test helps doctors check if your bone marrow is making enough healthy blood cells."]

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

Key facts at a glance

LOINC
95224-2
Short code
Myelocytes NFr Stem prod Manual
Synonyms
Myelocytes NFr Stem prod Manual
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
manual-count
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 This Test Measures

Myelocytes are early-stage white blood cells produced in the bone marrow. This qualitative test examines their count and appearance under a microscope to determine if stem cell production is normal or altered, often in response to conditions like infection, inflammation, or bone marrow disorders.

Why It’s Done

Doctors may order this test if you have symptoms like fatigue, frequent infections, or unexplained bruising, or if you’re undergoing treatment for blood disorders (e.g., leukemia, anemia) or chemotherapy. It can also be part of a broader evaluation for bone marrow function.

Sample Collection and Preparation

A small blood sample is drawn from a vein, typically in your arm. The sample is sent to a lab where it’s examined under a microscope to count and analyze myelocytes. This is a qualitative test, meaning it provides a yes/no or descriptive assessment rather than a numeric result.

What to Expect Before the Test

No special preparation is needed. You may have some mild discomfort from the needle, but it usually goes quickly. If you’re on blood-thinning medication, let your doctor know before the test.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Myelocyte Evaluation

Frequently asked questions

What Does a Positive or Abnormal Result Mean?
An abnormal myelocyte count—either too few or too many—can signal underlying issues. For example, low counts may indicate bone marrow suppression (e.g., from chemotherapy), while high counts could suggest conditions like myeloproliferative disorders or certain infections.
How Might This Test Affect My Treatment?
If your results are abnormal, your doctor may recommend further testing (e.g., bone marrow biopsy) or adjust treatments like medications, stem cell therapies, or lifestyle changes to support blood cell production.
Can I Get This Test at Home?
No, this test requires a lab setting. Blood samples are collected by a healthcare professional, and results are interpreted by a medical team.
  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