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Sedimentation Rate (LAB000621)
Test Mnemonic:


Specimen Requirements:

Routine venipuncture;  Collect in EDTA (lavender tube).


EDTA (lavender tube).

Minimum Volume:

-10% of stated tube capacity.


For best results, deliver to lab within 4 hours. Refrigeration is required for samples that may be delayed in delivery to the lab. 


EDTA samples are stable up to 4 hours at room temperature and 24 hours when refrigerated.     

Causes for Rejection:

QNS, clotted, severely hemolyzed specimen, unrefrigerated  specimen greater than 4 hours old, identification errors.

Reference Range:

Varies by reporting lab. Refer to laboratory result.

Turnaround Time:

 ROUTINE: 8 hours;  STAT not available


Varies by lab. Results are recorded as millimeters/hr.


Specimen accepted 24 hours per day.


Galveston Lab, ADC Lab, CLC Lab, LCC Lab



Clinical Indication:

Non specific screening test that may be increased in acute tissue damage, chronic inflammation, chronic infection, and pregnancy.

CPT 4 Code:



Deliver promptly to the lab.

Interfering Substances: Gross hemolysis, severe lipemia, clotted sample, cold agglutinins. Sedimentation rate is affected not only by presnce of plasma proteins, but also by any condition affecting the number, size, or shape of red blood cells.

When ordering tests for which Medicare or Medicaid reimbursement will be sought, physicians should only order tests that are medically necessary for the diagnosis or treatment of the patient. Components of the organ or disease panels may be ordered individually. The diagnostic information must substantiate all tests ordered and must be in the form of an ICD-10 code or its verbal equivalent.
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