This week, 4 Health Care Providers & Services stocks are improving their overall rating on Portfolio Grader. Each of these rates an “A” (“strong buy”) or “B” overall (“buy”).

This week, VCA Inc.’s (WOOF) ratings are up from a C last week to a B. VCA Inc. is an animal healthcare company that provides veterinary services, diagnostic testing and medical technology products and services to the veterinary market. The company also gets A’s in earnings growth. For more information, get Portfolio Grader’s complete analysis of WOOF stock.

This is a strong week for Adeptus Health, Inc. Class A (ADPT). The company’s rating climbs to A from the previous week’s B. The company also gets A’s in sales growth and earnings surprise. For more information, get Portfolio Grader’s complete analysis of ADPT stock.

U.S. Physical Therapy, Inc. (USPH) gets a higher grade this week, advancing from a B last week to a A. U.S. Physical Therapy, Inc. operates outpatient physical and occupational therapy clinics that provide pre- and post-operative care and treatment for orthopedic-related disorders, sports-related injuries, preventative care, rehabilitation of injured workers and neurological-related injuries. For more information, get Portfolio Grader’s complete analysis of USPH stock.

This week, Amedisys, Inc. (AMED) pushes up from a B to a A rating. Amedisys, Inc. provides home health care and hospice services in the United States. For more information, get Portfolio Grader’s complete analysis of AMED 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.