providers
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Marina Kusserow
Marina Kusserow is an Operating Partner at Andreessen Horowitz (a16z) on the Bio+Health team, where she leads healthcare business development strategy across payers, providers, and large employers. A health policy graduate who cut her teeth at Oxeon Partners, then became Chief of Staff for Walmart Health's clinical delivery team, then tackled M&A at Unite Us, Marina now serves as connective tissue between a16z's portfolio companies and the broader healthcare ecosystem. She splits her time between New York City and Nashville, Tennessee.
Samantha Walter
Samantha Walter is a Healthcare Partner on the Bio + Health team at Andreessen Horowitz (a16z), where she helps portfolio companies grow by building strategic partnerships across the care delivery ecosystem - payors, providers, employers, and retail. A University of Wisconsin-Madison finance graduate originally from Minneapolis, she brings deep operational credibility to the VC world: before joining a16z, she built a Direct Contracting Entity at Carelon (then CareMore/Aspire under Anthem/Elevance) in 2020, drove customer success at Quartet Health, and cut her teeth as a healthcare revenue cycle consultant at Huron Consulting Group in New York City. She lives and works in NYC, bridging Silicon Valley capital with real-world healthcare infrastructure.