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What causes increased D-dimer after COVID-19?

This Premium Q&A, reviewed and published, features a real conversation between an iCliniq user and a physician.

Patient's Query

Hi doctor,

I have the post-COVID syndrome. My D-dimer increased from 0.22 to 0.74 ng/mL in one month. I had a CT scan for pulmonary embolism, but I am clear. I have neurological issues too. Is the increase in my D-dimer a concern? What if it triples again?

Please help.

Answered by Dr. Muhammad Zubayer Alam

Education:

MBBS

Professional Bio:

Dr. Muhammad Zubayer Alam is a General Practitioner and Family Physician with broad clinical experience. He specializes in Pulmonology and Internal Medicine, delivering expert care for respiratory and internal conditions. With a patient-centered approach, he emphasizes accurate diagnosis, effective treatment, and prevention, providing comprehensive, personalized care to improve health outcomes and quality of life for patients across all ages.

This doctor is not available for online consultations on the platform anymore.

Hi,

Welcome to icliniq.com.

I can understand your concern. According to your statement, you have been suffering from post-COVID syndrome. Your recent D-dimer is 0.74 ng/mL, which is above normal. Raised D-dimer levels may result from obesity, cardiovascular disease, older age, and viral infections like COVID-19.

A D-dimer value higher than normal is significant, and it may indicate a future chance of developing coagulopathy or blood clots. Three or four times higher than the normal value is also significant and also indicates the chance of developing coagulopathy or blood clots. As you have a recent history of undergoing investigations like a CT (computed tomography) scan that excludes pulmonary embolism or blood clots, and your D-dimer level is not greater than two-fold of an upper limit of normal D-dimer level, get a blood D-dimer test done after a few days.

Take care.

Medically reviewed by Dr. Sneha Kannan
Published At March 6, 2021
Reviewed At June 8, 2026

Education:

MBBS

Professional Bio:

Dr. Muhammad Zubayer Alam is a General Practitioner and Family Physician with broad clinical experience. He specializes in Pulmonology and Internal Medicine, delivering expert care for respiratory and internal conditions. With a patient-centered approach, he emphasizes accurate diagnosis, effective treatment, and prevention, providing comprehensive, personalized care to improve health outcomes and quality of life for patients across all ages.

This doctor is not available for online consultations on the platform anymore.

Education:

BDS

Professional Bio:

Dr. Sneha Kannan is a skilled Dental Surgeon with expertise in providing general dental care, including scaling, fillings, and preventive treatments. She does oral surgery procedures such as extractions and minor surgical interventions. She does procedures in restorative dentistry, including crowns, bridges, and dentures. She is an expert in doing endodontic treatments such as root canal therapy. She is well-versed in doing procedures in cosmetic dentistry, including teeth whitening and smile correction. She can provide pediatric dental care for children’s oral health and preventive treatments. She promotes oral hygiene awareness and preventive dental practices.  

This doctor is not available for online consultations on the platform anymore.

Same symptoms don't mean you have the same problem. Consult a doctor now!

Education:

MBBS

Professional Bio:

Dr. Muhammad Zubayer Alam is a General Practitioner and Family Physician with broad clinical experience. He specializes in Pulmonology and Internal Medicine, delivering expert care for respiratory and internal conditions. With a patient-centered approach, he emphasizes accurate diagnosis, effective treatment, and prevention, providing comprehensive, personalized care to improve health outcomes and quality of life for patients across all ages.

This doctor is not available for online consultations on the platform anymore.

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