Letter R

Red cell distribution width

A measurement of the variability of red blood cell size.

Higher numbers indicate greater variation in size.

The normal range for the red cell distribution width (RDW) is 11 - 15. The RDW is a standard part of the complete blood count

Medical disclaimer

The information on this page is for educational and informational purposes only and does not constitute medical advice in any way.

It does not replace the advice of a physician, pharmacist or other healthcare professional.
It does not represent a prescription of drugs, diagnostic exams or therapies.
In case of symptoms, doubts or concerns about your health, always consult a qualified physician.

In case of emergency call 911 (US) or 112 (EU).