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”).

Quest Diagnostics Incorporated (DGX) gets a higher grade this week, advancing from a C last week to a B. Quest Diagnostics Incorporated provides diagnostic testing, information, and services. The company also gets A’s in operating margin growth, earnings growth, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of DGX stock.

Almost Family, Inc. (AFAM) shows solid improvement this week. The company’s rating rises from a B to a A. Almost Family, Inc. is a regionally focused provider of home health services with locations around the United States. The company also gets A’s in operating margin growth, earnings growth, earnings revisions, earnings surprise, and free cash flow. For more information, get Portfolio Grader’s complete analysis of AFAM stock.

LHC Group, Inc. (LHCG) improves from a B to a A rating this week. LHC Group, Inc. provides post-acute healthcare services primarily to Medicare beneficiaries in rural markets in the southern United States. The company also gets A’s in earnings growth. For more information, get Portfolio Grader’s complete analysis of LHCG stock.

This week, Triple-S Management Corporation Class B (GTS) pushes up from a B to a A rating. Triple-S Management Corporation Class B is an independent licensee of the Blue Cross Blue Shield Association. The company also gets A’s in sales growth, operating margin growth, earnings revisions, earnings surprise, and free cash flow. For more information, get Portfolio Grader’s complete analysis of GTS 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.