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ESR

ESR

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The ESR (Erythrocyte Sedimentation Rate) test measures how quickly red blood cells settle at the bottom of a test tube, indicating the presence of inflammation in the body. Elevated ESR levels can signal various conditions, including infections and autoimmune disorders. This test is a valuable tool for diagnosing and monitoring inflammation-related health issues, helping you and your healthcare provider identify underlying causes of symptoms.

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About This Test

Reason to Check It

"The ESR test measures how quickly erythrocytes (red blood cells) settle at the bottom of a test tube containing a blood sample. A faster-than-normal rate may indicate inflammation in the body. Here’s how it fits into clinical practice:


: ESR can be elevated in both inflammatory and neoplastic (cancerous) diseases, but it is not specific enough to differentiate between them on its own. It can suggest the presence of an underlying condition that might need further investigation, but additional specific tests are required for diagnosis.


: ESR is often used to assess the severity of inflammation and to monitor the effectiveness of treatment in inflammatory diseases, such as rheumatoid arthritis, polymyalgia rheumatica, and systemic lupus erythematosus. However, it is not a direct index of disease severity as its levels can be influenced by other factors such as age, anemia, and pregnancy." - Dr. Alan Hopkins

Test Preparation

  • No special preparation is required before your sample collection.


Please Note: We recommend overnight fasting and an early morning blood draw for all tests, even if no special preparation is required. Remember, it is OK to drink plenty of water. Drinking water helps hydrate you and makes it easier for the phlebotomist to obtain your blood sample.

Test Type and Method

Test Type:

  • Blood


Test Method:

  • In-person Blood Draw

Post-Test Notes

  • Once your specimen is collected, test results are typically processed and available within a few business days. Processing times may vary depending on the test. Your results will be delivered in a clear, easy-to-understand report. If any values fall outside the expected range, you may receive a follow-up call from an independent healthcare coordinator.

Lab Testing is Simple, Fast, and Convenient

Choose the Individual Test or Lab Panel that suits your health needs. You’ll receive your lab requisition within 24 hours. Visit any of the 3,000+ Quest Diagnostics centers using the button below. Once your sample is collected, your results will be securely delivered via email within 7–10 days.

View Quest Draw Locations

Lab Testing is Simple, Fast, and Convenient

Choose the Individual Test or Lab Panel that suits your health needs. You’ll receive your lab requisition within 24 hours. Visit any of the 3,000+ Quest Diagnostics centers using the button below. Once your sample is collected, your results will be securely delivered via email within 7–10 days.

View Quest Draw Locations