The Cleveland Clinic-backed healthcare transparency company secures its fourth round of funding, taking it to $181m raised since it was founded in 2008.

Castlight Health, a US-based healthcare transparency company backed by strategic investors including US-based healthcare company Cleveland Clinic, raised $100m yesterday.

Backers of the series D round raised included mutual fund T Rowe Price, financial advisory firm Redmile Group, two unnamed mutual fund and the company’s previous investors. The round took the total amount raised by Castlight since it was founded in 2008 to $181m.

Castlight allows employers to provide cost and quality data for medical services for their employees.

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