This week, three Health Care Provider stocks are improving their overall ratings on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Amerigroup (NYSE:AGP) is progressing from last week’s rating of B (“buy”) as the company improves to an A (“strong buy”) this week. Amerigroup focuses on serving people, who receive healthcare benefits through publicly funded health care programs, including Medicaid, Children’s Health Insurance Program (CHIP), Medicaid expansion programs, and Medicare Advantage. In Portfolio Grader’s specific subcategory of Sales Growth, AGP also gets an A. For more information, get Portfolio Grader’s complete analysis of AGP stock.

Triple-S Management‘s (NYSE:GTS) grade is moving up to a B (“buy”) this week from last week’s C (“hold”). Triple-S Management is an independent licensee of the Blue Cross Blue Shield Association. The stock price has risen 5.2% over the past month, better than the 1.7% increase the S&P 500 has seen over the same period of time. For more information, get Portfolio Grader’s complete analysis of GTS stock.

The Providence Service (NASDAQ:PRSC) improves from a C to a B rating this week. Providence Service provides government-sponsored social services directly and through not-for-profit social services organizations whose operations it manages, and it arranges for and manages non-emergency transportation services. Wall Street seems to agree with the upgrade and has propelled the stock up 17.6% over the past month. For more information, get Portfolio Grader’s complete analysis of PRSC stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.