Included in your membership
MCV
All NiaHealth tests are processed in Canadian-certified labs, which are highly trusted by the medical community for their accuracy and reliability. Blood and urine samples are collected by licensed medical professionals and processed using state-of-the-art equipment. NiaHealth is SOC2 Type 2 certified.
What is it?
MCV stands for mean corpuscular volume. It reflects the average size of your red blood cells and is reported in femtolitres (fL) as part of a complete blood count (CBC).
Red blood cells can be smaller than normal, normal in size, or larger than normal. MCV helps categorize these patterns.
Why it matters
MCV helps clinicians classify anemia into three broad types: microcytic (small cells), often linked to iron deficiency or thalassemia; normocytic (normal sized cells), seen in conditions like acute blood loss or chronic disease; and macrocytic (large cells), commonly associated with vitamin B12 or folate deficiency, alcohol use, liver disease, or certain medications.
MCV does not diagnose a condition on its own. Instead, it guides further evaluation and testing when anemia or other CBC abnormalities are present.
Reference ranges
- Below range: Smaller than normal red blood cells. This pattern is most often associated with iron deficiency or thalassemia, though other causes are possible.
- Within range: Average red blood cell size is normal. If anemia is present despite a normal MCV, additional testing is needed to determine the cause.
- Above range: Larger than normal red blood cells. This can be seen with vitamin B12 or folate deficiency, alcohol use, liver disease, certain medications, reticulocytosis, or bone marrow conditions.
Maner, B. S., Killeen, R. B., & Moosavi, L. (2025). Mean corpuscular volume. In StatPearls. StatPearls Publishing.
Sarma, P. R. (1990). Red cell indices. In Clinical Methods: The History, Physical, and Laboratory Examinations. Butterworths.
This information is educational and does not replace medical advice, diagnosis, or treatment. Your results should be interpreted with a qualified healthcare professional in the context of your health history.
