** Genetic testing firm Natera's shares rise 17.9% to $159

** Co late on Tuesday forecast annual revenue between $1.61 bln and $1.64 bln, higher than previous estimate of $1.49 bln to $1.52 bln

** At least 9 brokerages raise PT

** Brokerage BTIG raises PT to $185 from $150, says, "Natera knocks it out of the park, again - fundamentals of the business keep improving"

** Co reported Q3 rev of $439.8 mln compared with $268.3 mln a year ago — an increase of 63.9%

** NTRA says increase in total revenues driven by 64.4% increase in product revenues, which were $436.1 mln in Q3 vs $265.2 mln a year ago

** Processed about 775,800 tests in Q3, compared with about 626,000 tests a year ago - NTRA

** Including session's moves, stock more than doubled YTD

(Reporting by Sneha S K)

((Sneha.SK@thomsonreuters.com;))