Anecdata: I&#x27;m a physician, and get tests done for myself and my family at the Theranos place in Palo Alto, for around $5&#x2F;test (vs $50 for other labs), and I have no concern about the accuracy of the tests. This abstract discusses some of the  possible reasons for variation in test results:
<a href="http:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pubmed&#x2F;10887452" rel="nofollow">http:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pubmed&#x2F;10887452</a>
Of course, none of this proves that the tests are reliable (consistent) and accurate, just that there are several explanations for unexpected and unrepeatable values in a given patient.