The mid-range compensation for the leaders of 230 hospitals, universities, big charities and foundations was $209,914 last year, according to an annual survey of compensation levels in the world of nonprofit organizations. The figure was a median, which means that half of the executives earned more than that and half less. The highest single earner on the list was Wayne Isom, chairman of the department of cardiothoracic surgery at Cornell University. He was paid $1,728,999, plus benefits worth $45,431. The survey was conducted by the Chronicle of Philanthropy, a biweekly newspaper for the nonprofit community.