Are Wall Street Analysts Predicting Quest Diagnostics Stock Will Climb or Sink?

Quest Diagnostics Incorporated (DGX), headquartered in Secaucus, New Jersey, offers diagnostic testing and services globally. Valued at $20 billion by market cap, the company operates a national network of full-service laboratories, rapid-response laboratories, and patient service centers. DGX offers esoteric, routine medical, drugs of abuse, and non-hospital-based anatomic pathology testing services.

Shares of this leading diagnostic testing & services provider have outperformed the broader market over the past year. DGX has gained 16.4% over this time frame, while the broader S&P 500 Index ($SPX) has rallied nearly 14.3%. In 2025, DGX stock is up 18.4%, surpassing SPX’s 9.5% rise on a YTD basis.