Walmart Inc WMT healthcare executive Cheryl Pegus will join JP Morgan Chase & Co’s JPM Morgan Health venture as a managing director, aiming to improve employer-sponsored health care. Pegus, a cardiologist with a master’s in public health, joined Walmart less than two years ago as executive vice president of health and wellness, Bloomberg reports. During her tenure, the company acquired the small telehealth provider MeMD, launched new low-cost insulin, and signed a deal with UnitedHealth Group Inc UNH to care for Medicare patients at Walmart Health centers. The move creates a vacancy at the nation’s largest retailer, as rivals like Amazon.com Inc AMZN and CVS Health Corp CVS broaden their reach into the $4 trillion U.S. healthcare industry. …