These are laboratory charges only and do not include the costs of taking cell samples from patients or the costs of genetic counseling. This is what the HMO pays. If patients were able to go to the laboratory directly and request tests, they would be charged more. All the tests on this list are for children and adults.
None is a prenatal test.
All of these are molecular tests that look for deletions of parts of chromosomes, for rearrangements of genes on a chromosome, or for unusual variations in individual genes themselves. None of these tests looks for additions or deletions of entire chromosomes themselves. Angelman syndrome causes severe mental retardation, profound speech problems, stiff, uncoordinated arm and leg movements, seizures, and inappropriate laughter. If the same deletion appears on the chromosome 15 inherited from the father, it produces a very different syndrome. Prader-Willi syndrome, which is characterized by mild to moderate mental retardation and an uncontrollable appetite that leads to extreme obesity unless access to food is limited.