The overall ratings of 5 Health Care Providers & Services stocks are down on Portfolio Grader this week. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Centene Corporation (CNC) is having a tough week. The company’s rating falls from a C to a D. Centene Corporation is a multi-line healthcare enterprise engaged in Medicaid managed care and other specialty services. The company also gets F’s in earnings growth and earnings momentum. For more information, get Portfolio Grader’s complete analysis of CNC stock.

Premier Inc. Class A (PINC) slips from a C to a D this week. For more information, get Portfolio Grader’s complete analysis of PINC stock.

AAC Holdings, Inc.’s (AAC) rating weakens this week, dropping to a D versus last week’s C. AAC Holdings, Inc. is a blank check company organized under the laws of the Cayman Islands as an exempted company with limited liability. The company also gets F’s in earnings growth and earnings momentum. For more information, get Portfolio Grader’s complete analysis of AAC stock.

Alliance HealthCare Services, Inc. (AIQ) gets weaker ratings this week as last week’s D drops to a F. Alliance HealthCare Services, Inc. provides outsourced diagnostic imaging services. The company also gets F’s in operating margin growth and earnings growth. For more information, get Portfolio Grader’s complete analysis of AIQ stock.

Slipping from a D to a F rating, Five Star Quality Care, Inc. (FVE) takes a hit this week. Five Star Quality Care, Inc. leases and operates senior living facilities. The company also gets F’s in earnings revisions, earnings surprise, and free cash flow. For more information, get Portfolio Grader’s complete analysis of FVE 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.