What causes high D Dimer and low CRP?

High D Dimer and low CRP can be caused by many reasons.

If your D Dimer is in between 0.1 ug/mL and 0.51 ug/mL and your CRP is in between 0.1 mg/L and 3 mg/L then you need not worry as these are the normal ranges for D Dimer and CRP respectively. But if your levels are lesser or greater than the above values, then there may be some problem in your body.

Some examples of conditions that can increase or decrease D Dimer levels include:

• Smoking
• Obesity
• Clotting disorder such as factor V Leiden mutation
• Antiphospholipid syndrome
• Prolonged immobility

Normal range of D Dimer : 0.1 - 0.51 ug/mL

Ideal values of D Dimer depending on age :

Age	Ideal D Dimer value
<5 years	0.114
5-10 years	0.118
10-15 years	0.122
15-20 years	0.126
20-25 years	0.13
25-30 years	0.135
30-35 years	0.14
35-40 years	0.145
40-45 years	0.15
45-50 years	0.155
50-55 years	0.16
55-60 years	0.166
60-70 years	0.172
70-80 years	0.178
80-90 years	0.184
90-100 years	0.19
>100 years	0.197

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

Normal range of CRP : 0.1 - 3 mg/L

Ideal values of CRP depending on age :

Age	Ideal CRP value
<5 years	0.11388
5-10 years	0.1179
10-15 years	0.12206
15-20 years	0.12637
20-25 years	0.13083
25-30 years	0.13545
30-35 years	0.14023
35-40 years	0.14518
40-45 years	0.1503
45-50 years	0.15561
50-55 years	0.1611
55-60 years	0.16679
60-70 years	0.17268
70-80 years	0.17878
80-90 years	0.18509
90-100 years	0.19162
>100 years	0.19838

High D Dimer and low CRP can be caused by a lot of reasons. If you take D Dimer and CRP blood tests and the results are higher than 0.51 ug/mL for D Dimer and lower than 0.1 mg/L for CRP, your physician may recommend more tests to figure out the problem. You might also get these tests if your physician thinks you have some other disease.

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How the D Dimer and CRP Tests Are Done :

If your doctor wants D Dimer and CRP tests on you, you may need to go through these tests. During the D Dimer and CRP blood tests, a pathologist will put a needle into your veins and take out a small quantity of blood. A pathologist is a physician in the medical field who thoroughly studies the causes and effects of disease. Within a few hours you will get your D Dimer and CRP Test reports by your pathologist.

Medical References

• Cleveland Clinic – D-Dimer Test: What It Is, What It Is Used For, Risks & Results
• MedlinePlus – D-Dimer Test
• WebMD – D-Dimer Test: What It Is and How It Works
• NIH – D-Dimer Test