The grades of four health care provider stocks are on the rise this week on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Amedisys, Inc. (AMED) is bumping up its rating from a C (“hold”) to a B (“buy”) this week. Amedisys provides home health care and hospice services in the United States. For more information, get Portfolio Grader’s complete analysis of AMED stock.

Concord Medical Services Holding Ltd. ADR (CCM) is progressing from last week’s rating of B (“buy”) as the company improves to an A (“strong buy”) this week. 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.

Cardinal Health, Inc. (CAH) boosts its rating from a B to an A this week. 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.

Magellan Health, Inc. (MGLN) is seeing ratings go up from a C last week to a B this week. Magellan Health Services coordinates and manages the delivery of behavioral healthcare treatment services. For more information, get Portfolio Grader’s complete analysis of MGLN 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.