The grades of four health care provider stocks are better this week, according to the Portfolio Grader database. Every one of these stocks has an “A” (“strong buy”) or “B” overall (“buy”) rating.

Magellan Health, Inc. (MGLN) is making progress this week as its rating of C (“hold”) from last week increases to a B (“buy”) rating this week. Magellan Health Services coordinates and manages the delivery of behavioral healthcare treatment services. In Portfolio Grader’s specific subcategories of Earnings Surprise and Cash Flow, MGLN also gets A’s. For more information, get Portfolio Grader’s complete analysis of MGLN stock.

Amedisys, Inc. (AMED) boosts its rating from a C to a B this week. Amedisys provides home health care and hospice services in the United States. Shares of the stock have been changing hands at an unusually rapid pace, twice the rate of the week prior. For more information, get Portfolio Grader’s complete analysis of AMED stock.

This week, Concord Medical Services Holding Ltd. ADR (CCM) is showing good progress as the company’s rating jumps from a B (“buy”) last week to an A (“strong buy”). Concord Medical Services operates a network of radiotherapy and diagnostic imaging centers in the People’’s Republic of China. For more information, get Portfolio Grader’s complete analysis of CCM stock.

This week, Cardinal Health, Inc.’s (CAH) ratings are up from a B last week to an A. Cardinal Health provides products and services related to the safety and productivity of healthcare. For more information, get Portfolio Grader’s complete analysis of CAH 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.