San Francisco-based Omada Health, an online and mobile diabetes prevention program, raised $23 million in a round led by Andreessen Horowitz, with participation from Kaiser Permanente Ventures and return backers U.S. Venture Partners and The Vertical Group. This brings Omada Health's total funding to $28.5 million.

Omada Health's program, Prevent, lasts 16 weeks and aims to help those that are at-risk for Type 2 diabetes make positive health behavior changes. The program was based on a 2002 NIH Diabetes Prevention Program (DPP) intervention that produced significant results for prediabetics.

Users are paired with a health coach who monitors their progress throughout the program. Each week, users take an interactive health lesson that covers a range of topics including exercise and nutrition on a mobile device or computer. As part of the program, users receive a wireless-enabled scale and pedometer so that they can track their progress digitally.

Since their last investment round in March 2014, Prevent has signed on more than 10 enterprise customers including "major organizations, integrated delivery networks and health plans such as Blue Cross Blue Shield Louisiana, Kaiser Permanente, and Stanford Hospital & Clinics," Sean Duffy, co-founder and CEO of Omada Health, told MobiHealthNews in an email.

Some of the funds from this round will be used to expand Omada Health's product line to include more services that focus on preventive health. Duffy said they are actively exploring potential areas that they could create programs in and hope to begin prototyping new programs this year. Omada Health plans to have one to two new programs in the market at some point in 2015.

Omada Health also expects to double in size, from 30 to 60 people, by the end of the year. Another portion of the most recent round will go toward hiring engineers and designers.