Cystatin C

This test measures the amount of a protein called cystatin C in your blood. This is a fairly new blood test to look at your kidney health.

Cryoglobulin

This test is done to find out if you have abnormal proteins in your blood. They can be a sign of rheumatoid arthritis, lupus, or Raynaud's syndrome, among other illnesses.

Clonazepam Level (Blood)

This test measures the amount of clonazepam in your blood. Clonazepam is a medicine used to treat seizures.

Clinical Genetic Testing

This screening test looks for inherited diseases or genes that put you at risk for a certain disease.

Chromosome Analysis

This test looks for changes, or abnormalities, in the chromosomes that make up your body's DNA, or genetic road map.