Tests & Procedures

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D-Dimer
This test is used to rule out whether you have a blood clot. When blood clots form and start to break down, they release the substance D-dimer into the blood.
Deamidated Gliadin Antibody
This test helps your doctor find out whether you have celiac disease, an autoimmune disorder.
Deep Brain Stimulation
Deep brain stimulation (DBS) is a type of therapy that uses electrical stimulation to treat Parkinson’s disease, essential tremor, multiple sclerosis, and certain other neurological conditions.
Dehydroepiandrosterone and Dehydroepiandrosterone Sulfate
This test measures the level of DHEA and DHEA-S in your blood. It may also be used to check how well your adrenal glands are working.
Diabetes Autoantibody Panel
This blood test checks for substances called antibodies, which are produced in response to insulin and other chemicals related to insulin. It is used to determine whether a person has type 1 or type 2 diabetes.
Digoxin Drug Level
This test measures the amount of the heart drug digoxin in your blood. When you take digoxin, it’s important that the drug be at the right level for you to benefit from it.
Dilation and Curettage (D and C)
A dilation and curettage procedure, also called a D and C, is a surgical procedure in which the cervix is dilated so that the cervical canal and uterine lining can be scraped with a spoon-shaped instrument to remove abnormal tissues.
Diphtheria Antitoxoid Antibody
This test measures the level of diphtheria antibodies in your blood. Diphtheria is extremely rare in the U.S., but you may be at risk if you have traveled to an area where the disease is common.
Direct Antiglobulin
The direct antiglobulin test, or direct Coombs test, is a blood test used to diagnose a type of anemia caused by your immune system.
Direct Bilirubin
This test looks for bilirubin in your blood or urine. The test is usually done to look for liver problems, such as hepatitis, or blockages, such as gallstones.