Is RDW 21 high, normal or dangerous? What does Red cell distribution width level 21 mean?

RDW 21

Your RDW level of 21 is a High RDW level.

High RDW levels may signal health problems. Generally, levels between 11.6 % to 14 % are considered normal. However, if your levels fall outside this range, it is important to seek medical advice. Consulting a doctor for abnormal creatinine levels is recommended.

Important - Go to the end of this article and read how our patients treated their high RDW levels 

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Normal range of RDW found among men :11.6 - 14 %

Ideal values of RDW depending on age (male) :
Age Ideal RDW value
<5 years 11.844
5-10 years 12.093
10-15 years 12.347
15-20 years 12.606
20-25 years 12.871
25-30 years 13.141
30-35 years 13.417
35-40 years 13.699
40-45 years 13.987
45-50 years 13.981
50-55 years 13.975
55-60 years 13.968
60-70 years 13.962
70-80 years 13.956
80-90 years 13.95
90-100 years 13.944
>100 years 13.938

*Ideal values ​are calculated based on our database of patient records

Get Advice via Email : Send us your blood test report, and our RDW experts will review it. Within 12 hours, you'll receive a detailed analysis and precise treatment guidance via email. If you have other blood test results besides RDW, please upload those as well. A comprehensive diagnosis often depends on evaluating all abnormalities for an accurate assessment. Upload blood test report now

1,51,150

Total number of patients treated

Important - Read more questions about high RDW levels after this video message 

A video message on the treatment of your high RDW level

If you want your blood test report to be interpreted by RDW specialist, you can upload your report. Our RDW expert will provide you with the most accurate interpretation of your blood test results and treatment within 12 hours.Upload blood test report now

Important - At the end of this article read how our patients treated their high RDW levels 

Some examples of conditions that increase or decrease RDW levels include:

  • Crohn's disease
  • Chronic liver disease
  • Thalassemia, an inherited blood disorder
  • An iron or vitamin deficiency
  • Heart disease
Contact a doctor

Receive world-class medical opinion about your high RDW levels over email.Upload blood test report now

Important - At the end of this article read how our patients treated their high RDW levels 

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Normal range of RDW found among women :11.6-14 %

Ideal values of RDW depending on age (female) :
Age Ideal RDW value
<5 years 11.851
5-10 years 12.107
10-15 years 12.369
15-20 years 12.637
20-25 years 12.91
25-30 years 13.189
30-35 years 13.474
35-40 years 13.765
40-45 years 13.759
45-50 years 13.753
50-55 years 13.746
55-60 years 13.739
60-70 years 13.732
70-80 years 13.726
80-90 years 13.72
90-100 years 13.714
>100 years 13.708
Chest pain

Can Low or High RDW cause Heart Problems?

Read on to know how abnormal RDW affects heart

Know more

If you take a RDW blood test and the results are not in the normal range (11.6-14 %), your physician may recommend more tests to figure out the problem. You might also get this test if your physician thinks you have some other disease.

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How the RDW Test Is Done :

When your doctor recommends a RDW test, you'll likely undergo a simple blood draw specifically to measure RDW levels. A pathologist, a specialist in disease study, will collect a small blood sample from your veins using a needle. Your RDW test results are typically available within a few hours after the procedure.

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Dr. Dwayne Michaels
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Dr. Dwayne Michaels
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