RDW
A red cell distribution width (RDW) test measures how much the volume and size of your red blood cells (erythrocytes) varies.
The RDW blood test is often part of a complete blood count (CBC), a group of tests that measures the number and type of cells in your blood, including red cells. The RDW test is commonly used to help diagnose or determine what's causing anemia, a condition in which your body does not make enough red blood cells.
Source: MedlinePlus, U.S. National Library of Medicine
Normal range
No published reference range from a named lab yet.
What an abnormal result can be associated with
- A high result
- Increased RBC distribution width
Associations from LOINC2HPO (Human Phenotype Ontology). This is reference information, not a diagnosis — only a clinician can interpret your result in context.
Details
- Sample
- Whole blood · LOINC
- Code
- LOINC 21000-5 · fL
- Also known as
- Erythrocyte distribution width, Red cells, Entitic volume, Red cell, Electr