One pick is Quest Diagnostics, the leading provider of clinical diagnostic tests for doctors and hospitals.

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One of Waller's favorites is Quest Diagnostics, the nation's largest medical testing company, with a 12% market share.

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Quest Diagnostics, Inc. ( NYSE: DGX), according to The Online Investor.

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So far the company has sold licenses to two universities and eight U.S. companies, including Quest Diagnostics, Nanogen, Perlegen Sciences and Myriad Genetics.

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The Piccolo takes 12.5 minutes to complete a reading, and delivers results (so says Abaxis) just as accurate as those done at labs run by giants Quest Diagnostics (nyse: DGX - news - people ) and Laboratory Corp. of America.

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Among the largest underlying components of RYH, in trading today Quest Diagnostics, Inc. ( NYSE: DGX) is up about 0.4%, Medco Health Solutions, Inc. ( NYSE: MHS) is up about 0.1%, and Varian Medical Systems, Inc. ( NYSE: VAR) is higher by about 2.2%.

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"In the past you needed to do a culture" to test a person's virus, says Jorge Leon, former head of DNA testing at Quest Diagnostics (nyse: DGX - news - people ) and now president of molecular diagnostics consulting firm Leomics Associates.

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Says Dr. Jon Nakamoto, an endocrinologist and a lab director for Quest Diagnostics: "Society and the medical community have to make a choice: How often do we get these false positives and how often do we make a difference in the outcome"--that is, save a life.

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At issue is the way that Medicare reimburses everyone from the big laboratory companies such as the Laboratory Corp of America (LH:NYSE) and Quest Diagnostics Inc. (DGX:NYSE), to the molecular diagnostic labs inside academic hospitals, and especially smaller firms that make proprietary tests used by doctors to more effectively target treatments to patients with conditions like cancer.

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