Seattle-based Carena, which offers a video visit service for health systems, has raised $13.3 million from Cambia Health Solutions, McKesson Ventures, Catholic Health Initiatives (CHI), and Martin Ventures.

Carena's video visit offering, which they describe as a virtual clinic, is designed to help extend health systems' services. Patients can request physician visits via phone or the web. Visits typically last 20 minutes.

Health systems can either use Carena bank of providers, which includes family practice physicians and advanced registered nurse practitioners, for their virtual clinic, or they can choose to staff the clinic with their own providers. 

Carena's physicians, who are salaried employees of Carena Medical Providers, can discuss issues with patients, make diagnoses, and prescribe medications over the phone or video. Common conditions treated using the virtual clinic include cold, pink eye, cold sore, rash, flu, sore throat, and urinary tract infection.

Carena claims it can launch, staff, and operate a 24-7 virtual clinic for health systems in less than 90 days. The company will also offer health systems a branded patient portal accessible via web or mobile device.

Last month, Carena announced that they had launched virtual clinics for four different providers including Seattle-based UW Medicine; Oklahoma City, Oklahoma-based Integris Health; Milwaukee, Wisconsin-based Froedtert & the Medical College of Wisconsin; and Springfield, Illinois-based Hospital Sisters Health System. Since then, Carena also signed on University of Iowa Healthcare in Iowa City, Iowa and OSF HealthCare in Peoria, Illinois.

Carena first started working with hospital systems in September 2013. Until then, Carena was providing its virtual visits service to employees of self-insured companies, including Franciscan Hospital Systems, which also ended up being one of the first health systems to roll out Carena's offering to its patients.