PatientSafe has closed a $20 million Series C round led by the Merck Global Health Innovation (GHI) fund with participation from other investors including Camden Partners, TPG Capital and Psilos Group.

The company also announced that Max Kahn, an investment principal at Merck GHI, has joined PatientSafe’s board of directors.

Last month a regulatory filing revealed the company had raised $13 million, according to a media report. Mobihealthnews says PatientSafe has upped the previous total to $20 million, before closing its investment round.

The company has raised a total of $50 million since 2010, according to a report in GigaOm.

PatientSafe will use the proceeds from the most recent round to drive hospital adoption of its point-of-care solutions that include apps for nurses to handle patient data and communicate with their colleagues via voice and SMS.