The grades of 7 Health Care Equipment & Supplies stocks are on the rise this week on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Edwards Lifesciences Corporation (EW) boosts its rating from a B to a A this week. Edwards Lifesciences Corporation provides products and technologies related to the treatment of advanced cardiovascular diseases. The company also gets A’s in earnings revisions, earnings momentum, and return on equity. For more information, get Portfolio Grader’s complete analysis of EW stock.

This is a strong week for West Pharmaceutical Services, Inc. (WST). The company’s rating climbs to A from the previous week’s B. West Pharmaceutical Services, Inc. is a manufacturer of components and systems for injectable drug delivery, and plastic packaging and delivery system components for the healthcare and consumer products industries. For more information, get Portfolio Grader’s complete analysis of WST stock.

Neogen Corporation (NEOG) improves from a C to a B rating this week. Neogen Corporation develops and markets products and services dedicated to food and animal safety. For more information, get Portfolio Grader’s complete analysis of NEOG stock.

This week, Natus Medical Incorporated (BABY) pushes up from a C to a B rating. Natus Medical Incorporated is a medical device company that develops, manufactures, and markets screening products. For more information, get Portfolio Grader’s complete analysis of BABY stock.

The rating of Insulet Corporation (PODD) moves up this week, rising from a C to a B. Insulet Corporation is a medical device company that develops, manufactures and markets an insulin infusion system for people with insulin-dependent diabetes. The company also gets A’s in sales growth and earnings surprise. For more information, get Portfolio Grader’s complete analysis of PODD stock.

This week, Merit Medical Systems, Inc.’s (MMSI) ratings are up from a C last week to a B. Merit Medical Systems, Inc. is engaged in the development, manufacture, and marketing of disposable medical products that are used primarily in diagnostic and interventional cardiology and radiology procedures. For more information, get Portfolio Grader’s complete analysis of MMSI stock.

Mazor Robotics Ltd Sponsored ADR (MZOR) is seeing ratings go up from a C last week to a B this week. For more information, get Portfolio Grader’s complete analysis of MZOR 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.