Editor's Note: TheStreet ratings do not represent the views of TheStreet's staff or its contributors. Ratings are established by computer based on metrics for performance (which includes growth, stock performance, efficiency and valuation) and risk (volatility and solvency). Companies with poor cash flow or high debt levels tend to earn lower ratings in our model One out of the three major indices are trading lower today with the Dow Jones Industrial Average ( ^DJI) trading down 9 points (-0.1%) at 12,786 as of Tuesday, Nov. 20, 2012, 11:49 AM ET. The NYSE advances/declines ratio sits at 1,471 issues advancing vs. 1,424 declining with 128 unchanged. The Health Services industry currently sits down 0.2% versus the S&P 500, which is up 0.0%. Top gainers within the industry include Life Technologies ( LIFE), up 1.6%, and Zimmer Holdings ( ZMH), up 0.6%. On the negative front, top decliners within the industry include Quest Diagnostics ( DGX), down 1.5%, DENTSPLY International ( XRAY), down 1.2%, Fresenius Medical Care Corporation ( FMS), down 0.9% and WellPoint ( WLP), down 0.7%. TheStreet Ratings group would like to highlight 4 stocks pushing the industry higher today: 4. Mednax ( MD) is one of the companies pushing the Health Services industry higher today. As of noon trading, Mednax is up $2.41 (3.3%) to $76.19 on heavy volume Thus far, 425,939 shares of Mednax exchanged hands as compared to its average daily volume of 358,400 shares. The stock has ranged in price between $74.02-$76.35 after having opened the day at $74.55 as compared to the previous trading day's close of $73.78. MEDNAX, Inc., together with its subsidiaries, provides neonatal, maternal-fetal, other pediatric subspecialties, and anesthesia physician services in the United States and Puerto Rico. Mednax has a market cap of $3.7 billion and is part of the health care sector. The company has a P/E ratio of 15.3, below the S&P 500 P/E ratio of 17.7. Shares are up 2.3% year to date as of the close of trading on Monday. Currently there are 9 analysts that rate Mednax a buy, no analysts rate it a sell, and 4 rate it a hold. TheStreet Ratings rates Mednax as a buy. The company's strengths can be seen in multiple areas, such as its revenue growth, largely solid financial position with reasonable debt levels by most measures, increase in stock price during the past year, growth in earnings per share and increase in net income. We feel these strengths outweigh the fact that the company has had somewhat disappointing return on equity. Get the full Mednax Ratings Report now.