Plano-based health care software company ZeOmega has acquired HealthUnity Corp., a health information technology based in Bellevue, Washington. The combined company is well positioned to help health care providers and payers share clinical and claims analytics with the goal of improving outcomes while reducing the cost of health care, Nandini Rangaswamy, ZeOmega's executive vice president and chief strategy officer, told the Dallas Business Journal in an interview. "We believe this is a huge…