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Complement C4 (Blood)
This test measures the amount of a protein called C4 in your blood. You may need this test if your doctor suspects that you have an autoimmune disease.
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Complete Blood Count
This test looks at the number and size of various blood cells to help judge your overall health or to diagnose a range of illnesses, from anemia to infections.
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Complete Blood Count With Differential
This panel of tests looks for many illnesses in your blood, including anemia, infections, and leukemia. It can help see how your overall health is.
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COVID-19 Antibody Test
This blood test checks if you had a COVID-19 infection in the past.
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Creatine Kinase (Blood)
This test measures the amount of a protein called creatine kinase (CK) in your blood. Levels of CK can rise after a heart attack or skeletal muscle injury.
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Creatine Kinase With Isoenzymes (Blood)
This test is used to find out whether you have muscle damage, including damage to your heart muscle.
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Creatine Kinase MB (Blood)
This test measures the amount of the enzyme creatine kinase in your blood. A certain form of this enzyme can help find out whether you're having a heart attack.
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Creatine Kinase MB/Creatine Kinase Ratio
This test measures the amount of creatine kinase (CK), an enzyme, in your blood. The test can help your doctor find out whether you're having a heart attack.
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Creatinine Clearance
This test measures how well your kidneys are working and how well blood is flowing to them.
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