In the age of consumerism, the strength of an organization's brand is becoming more closely linked to customer preference, loyalty, trust and overall organizational performance. Each year, valuation and strategy consultancy Brand Finance assesses and ranks the value of thousands of companies' brands from across the globe. Brand Finance first evaluates brands to determine their power and strength. It uses a variety of metrics to do so, including marketing investment, familiarity, loyalty, staff satisfaction and corporate reputation. Brand strength is used to determine what proportion of a business' revenue is contributed by the brand, which is then used to determine the brand's value. The 25 most valuable medical and healthcare brands in 2017 are listed below, as ranked by Brand Finance. No. 1 — UnitedHealth Group (Minnetonka, Minn.) No. 2 — Anthem (Indianapolis) No. 3 — Aetna (Hartford, Conn.) No. 4 — Medtronic (Dublin, Ireland) No. 5 — Humana (Louisville, Ky.) No. 6 — OptumHealth (Eden Prairie, Minn.) No. 7 — Cigna (Bloomfield, Conn.) No. 8 — Fresenius (Waltham, Mass.) No. 9 — Express Scripts (St. Louis) No. 10 — McKesson (San Francisco) No. 11 — Tenet Healthcare (Dallas) No. 12 — Amerisourcebergen (Chesterbrook, Pa.) No. 13 — Stryker (Kalamazoo, Mich.) No. 14 — Essilor (Charenton-le-Pont, France) No. 15 — Cardinal Health (Dublin, Ohio) No. 16 — Centene (St. Louis) No. 17 — DaVita (Denver) No. 18 — BD (Franklin Lakes, N.J.) No. 19 — Henry Schein (Melville, N.Y.) No. 20 — Health Net (Los Angeles) No. 21 — Boston Scientific (Marlborough, Mass.) No. 22 — St. Jude Medical (Saint Paul, Minn.) No. 23 — LabCorp (Burlington, N.C.) No. 24 — Quest Diagnostics (Madison, N.J.) No. 25 — Envision Healthcare (Greenwood Village, Colo.) Source