U.S. wealth managers are adding services such as psychological counseling for wealthy clients to set them apart from the competition, experts said.

Some of these psychologists handle clients who feel guilty about inheriting wealth. Others help with problems such as how to raise children in an environment where almost anything can be bought, or intervene when spouses fight over money.

"One of the biggest concerns when people become significantly wealthy is ... 'How am I going to raise my kids responsibly with all this money'," psychologist and consultant James Grubman told the Reuters Wealth Management Summit in Boston. ...