InstaMed, a payments processor for health-care providers heaquartered in Philadelphia, said it received a $50 million investment from Carrick Capital Partners, which it will use for expansion, InstaMed said.

The Carrick investment doubled the amount of venture capital InstaMed has raised since its founding in 2004 to $100 million. The company employs more than 200 in Philadelphia and in an office in Newport Beach, Calif., a spokeswoman said.

Carrick is based in San Francisco and Newport Beach. It is also and investor in Accolade, a Plymouth Meeting company that helps families of large self-insured employers navigate the health care system.