CD71 (Thrombopoietin Receptor) in Cells (Qualitative or Quantitative Analysis of Cell Surface Marker)
This test measures the presence or level of CD71, a protein found on certain blood cells, often used to assess cell health or specific blood disorders.
["CD71 helps identify certain blood cell types and may be checked for conditions like anemia or blood cancers."]
Key facts at a glance
- LOINC
- 21169-8
- Short code
- CD71
- Synonyms
- CD71 Cells NFr Spec
- Category
- chemistry
- Sample
- serum
- Container
- Heparinized (green-top) or EDTA (lavender-top) tube
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- ≥ 0 years
- Method
- Flow cytometry using fluorescence-labeled monoclonal antibodies directed against CD71 (transferrin receptor)
- CPT
- 86355
- SNOMED
- 444070009
- Specimen volume
- 3-5 mL of whole blood
- Stability
- Specimen should be processed within 24 hours of collection when stored at room temperature (18-25°C). Refrigerated specimens should be analyzed within 48 hours.
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 24–72 hours
- Order
- routine
Why This Test Might Be Ordered
Your doctor may order this test to evaluate blood cell function, diagnose or monitor conditions such as anemia, blood cancers (like leukemia), or other hematologic disorders. It can also help guide treatment decisions in certain blood-related diseases.
What to Expect Before the Test
No special preparation is usually needed. You may have a small sample of blood drawn from a vein, similar to other routine blood tests. If you’re taking blood-thinning medications, inform your healthcare provider beforehand.
What the Test Results Mean
Results may indicate whether CD71 is present on certain cells in expected or unusual amounts. Abnormal levels could suggest underlying conditions affecting blood cell production or function. Your doctor will interpret results in the context of your overall health and symptoms.
Common Conditions Monitored or Diagnosed
This test can be part of investigations for conditions like megaloblastic anemia, iron deficiency anemia, or blood cancers such as myeloproliferative disorders. It may also help assess bone marrow function or response to treatments.
Reference range
CD71+ cells typically constitute a minor fraction of peripheral blood cells. Results should be interpreted in conjunction with clinical context and additional immunophenotyping markers.N/A
No special patient preparation is required prior to specimen collection.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
CD71 Cell Marker Test
Frequently asked questions
What questions might you have about this test?
Will I need to fast before this test?
How long will it take to get my results?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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