This week, 6 Health Care Providers & Services stocks are improving their overall ratings on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

This week, Anthem, Inc. (ANTM) pushes up from a B to a A rating. For more information, get Portfolio Grader’s complete analysis of ANTM stock.

Chemed Corporation (CHE) improves from a B to a A rating this week. Chemed Corporation provides hospice care, and plumbing and drain cleaning services in the United States. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of CHE stock.

The rating of Quest Diagnostics Incorporated (DGX) moves up this week, rising from a C to a B. Quest Diagnostics Incorporated provides diagnostic testing, information, and services. The company also gets A’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of DGX stock.

Providence Service Corporation (PRSC) earns a B this week, jumping up from last week’s grade of C. Providence Service Corporation provides and manages government sponsored social services and non-emergency transportation services. The company also gets A’s in sales growth, earnings surprise, and free cash flow. For more information, get Portfolio Grader’s complete analysis of PRSC stock.

This is a strong week for PharMerica Corporation (PMC). The company’s rating climbs to B from the previous week’s C. PharMerica Corporation provides services to patients in hospitals and long term care settings. The company also gets A’s in free cash flow. For more information, get Portfolio Grader’s complete analysis of PMC stock.

This week, Digirad Corporation’s (DRAD) ratings are up from a C last week to a B. Digirad Corporation engages in the development and manufacture of medical diagnostic imaging systems for nuclear cardiology and general nuclear medicine applications primarily in the United States. The company also gets A’s in earnings growth and earnings momentum. For more information, get Portfolio Grader’s complete analysis of DRAD 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.