The ratings of 10 Health Care Providers & Services stocks are down this week, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

DaVita HealthCare Partners Inc. (DVA) declines this week from a C to a D. DaVita HealthCare Partners Inc. operates kidney dialysis centers in the United States. For more information, get Portfolio Grader’s complete analysis of DVA stock.

This week, AmSurg Corp. (AMSG) drops from a C to a D rating. AmSurg Corp. is involved in the development, acquisition, and operation of ambulatory surgery centers. The company also gets F’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of AMSG stock.

Acadia Healthcare Company, Inc.’s (ACHC) rating weakens this week, dropping to a F versus last week’s D. Acadia Healthcare Company, Inc. provides inpatient behavioral health care services. For more information, get Portfolio Grader’s complete analysis of ACHC stock.

LHC Group, Inc. (LHCG) experiences a ratings drop this week, going from last week’s B to a D. LHC Group, Inc. provides post-acute healthcare services primarily to Medicare beneficiaries in rural markets in the southern United States. For more information, get Portfolio Grader’s complete analysis of LHCG stock.

Team Health Holdings, Inc. (TMH) slips from a D to a F this week. Team Health Holdings, Inc. offers healthcare professionals outsourcing services. The company also gets F’s in operating margin growth and earnings momentum. For more information, get Portfolio Grader’s complete analysis of TMH stock.

This is a rough week for Envision Healthcare Holdings, Inc. (EVHC). The company’s rating falls to F from the previous week’s D. The company also gets F’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of EVHC stock.

Select Medical Holdings Corporation (SEM) earns a D this week, moving down from last week’s grade of C. Select Medical Holdings Corporation is an operator of specialty hospitals and outpatient rehabilitation clinics. For more information, get Portfolio Grader’s complete analysis of SEM stock.

This week, China Cord Blood Corporation’s (CO) rating worsens to a F from the company’s C rating a week ago. China Cord Blood Corporation engages in the provision of umbilical cord blood storage and ancillary services in its cord blood banks. The company also gets F’s in earnings revisions. For more information, get Portfolio Grader’s complete analysis of CO stock.

Five Star Quality Care, Inc. (FVE) gets weaker ratings this week as last week’s D drops to a F. Five Star Quality Care, Inc. leases and operates senior living facilities. The company also gets F’s in free cash flow. For more information, get Portfolio Grader’s complete analysis of FVE stock.

Slipping from a D to a F rating, Genesis Healthcare Inc Class A (GEN) takes a hit this week. Genesis Healthcare Inc Class A is a holding company that provides post-acute care. The company also gets F’s in earnings revisions and free cash flow. For more information, get Portfolio Grader’s complete analysis of GEN 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.