The grades of 4 Health Care Technology stocks are on the rise this week on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Medidata Solutions, Inc. (MDSO) gets a higher grade this week, advancing from a C last week to a B. Medidata Solutions, Inc. provides hosted clinical development solutions. The company also gets A’s in operating margin growth and earnings growth. For more information, get Portfolio Grader’s complete analysis of MDSO stock.

Omnicell, Inc. (OMCL) is seeing ratings go up from a C last week to a B this week. Omnicell, Inc. provides an integrated suite of clinical infrastructure and workflow automation solutions for healthcare facilities. The company also gets A’s in sales growth. For more information, get Portfolio Grader’s complete analysis of OMCL stock.

Evolent Health Inc Class A (EVH) improves from a C to a B rating this week. The company also gets A’s in sales growth, earnings revisions, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of EVH stock.

This week, Vocera Communications, Inc.’s (VCRA) ratings are up from a B last week to a A. Vocera Communications, Inc. is a provider of mobile communication solutions designed to restore the human connection to healthcare. The company also gets A’s in sales growth. For more information, get Portfolio Grader’s complete analysis of VCRA 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.