The grades of 13 Health Care Equipment & Supplies stocks are better this week, according to the Portfolio Grader database. Every one of these stocks has an “A” (“strong buy”) or “B” overall (“buy”) rating.

The rating of Cooper Companies, Inc. (COO) moves up this week, rising from a B to a A. Cooper Companies, Inc. develops, manufactures, and markets healthcare products. The company also gets A’s in earnings growth. For more information, get Portfolio Grader’s complete analysis of COO stock.

This is a strong week for STERIS Plc (STE). The company’s rating climbs to B from the previous week’s C. STERIS Plc provides products and services related to infection prevention and surgical procedures. The company also gets A’s in sales growth and earnings momentum. For more information, get Portfolio Grader’s complete analysis of STE stock.

Anika Therapeutics, Inc. (ANIK) gets a higher grade this week, advancing from a B last week to a A. Anika Therapeutics, Inc. develops, manufactures and commercializes therapeutic products for tissue protection, healing and repair. The company also gets A’s in earnings revisions, earnings surprise, and return on equity. For more information, get Portfolio Grader’s complete analysis of ANIK stock.

Orthofix International NV (OFIX) improves from a C to a B rating this week. Orthofix International NV is a global medical device company offering a line of surgical and non-surgical products mainly in the spine, orthopedics, sports medicine and vascular market sectors. The company also gets A’s in earnings surprise. For more information, get Portfolio Grader’s complete analysis of OFIX stock.

This week, Glaukos Corp (GKOS) pushes up from a C to a B rating. The company also gets A’s in sales growth and earnings momentum. For more information, get Portfolio Grader’s complete analysis of GKOS stock.

Cardiovascular Systems, Inc. (CSII) is seeing ratings go up from a C last week to a B this week. Cardiovascular Systems, Inc. focuses on developing and commercializing minimally invasive treatment solutions for vascular disease. The company also gets A’s in earnings surprise. For more information, get Portfolio Grader’s complete analysis of CSII stock.

LeMaitre Vascular, Inc. (LMAT) earns a A this week, jumping up from last week’s grade of B. LeMaitre Vascular, Inc. manufactures medical devices for vascular surgeons and interventionists. The company also gets A’s in operating margin growth, earnings revisions, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of LMAT stock.

Span-America Medical Systems, Inc.’s (SPAN) ratings are looking better this week, moving up to a B from last week’s C. Span-America Medical Systems, Inc. manufactures and distributes a variety of therapeutic support surfaces and related products made from polyurethane and other foam products for the medical, consumer and industrial markets. The company also gets A’s in free cash flow. For more information, get Portfolio Grader’s complete analysis of SPAN stock.

Invuity Inc (IVTY) shows solid improvement this week. The company’s rating rises from a C to a B. The company also gets A’s in sales growth and earnings revisions. For more information, get Portfolio Grader’s complete analysis of IVTY stock.

Alphatec Holdings, Inc. (ATEC) boosts its rating from a C to a B this week. Alphatec Holdings, Inc. designs, develops, manufactures, and markets products for the surgical treatment of spine disorders, primarily focusing on the aging spine in the United States and internationally. The company also gets A’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of ATEC stock.

This week, Volitionrx Limited’s (VNRX) ratings are up from a C last week to a B. For more information, get Portfolio Grader’s complete analysis of VNRX stock.

This is a strong week for Bovie Medical Corporation (BVX). The company’s rating climbs to A from the previous week’s B. Bovie Medical Corporation develops, manufactures, and markets medical products and devices with an emphasis on electrosurgical generators and electrosurgical disposables in the United States, Canada, and internationally. The company also gets A’s in sales growth, earnings revisions, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of BVX stock.

Cogentix Medical Inc (CGNT) shows solid improvement this week. The company’s rating rises from a C to a B. For more information, get Portfolio Grader’s complete analysis of CGNT 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.