Monday was a big day for health care company mergers and the firms that guided them, with nearly $5 billion in total value from two big tie-ups.

Outsourcing and technology company Cognizant Technology Solutions Corp. agreed to buy Englewood, Colo.-based health care IT company TriZetto Corp. for more than $2.7 billion in cash. And in a separate deal, industrial and consumer manufacturer Danaher Corp. said it would pay about $2.1 billion in cash, plus assumed debt, for the dental implant company Nobel Biocare Holding AG, based in Switzerland.