Doug Fisher, M.D., serves as Executive in Residence and Partner at InterWest Partners. See sector focus and contact routes.
Doug Fisher, M.D., serves as Executive in Residence and Partner at InterWest Partners, a San Francisco-based venture capital firm, having joined the firm in 2009 and been promoted to partner in January 2026. His investment thesis centers on healthcare, specifically biopharma, diagnostics, and medical devices, with a focus on companies that leverage his dual medical and business expertise. While specific check sizes and lead/follow behavior are not publicly detailed in available sources, Fisher led Sera’s Series A financing from InterWest in 2011, indicating a capacity to lead early-stage healthcare deals. Notable portfolio companies include Sera, a biotechnology company where he later served as Chief Business Officer, and potentially other healthcare ventures aligned with his sector focus. Fisher holds an M.D. from the University of Pennsylvania School of Medicine and an M.B.A. from Wharton, which underpins his distinctive point of view integrating clinical insight with strategic business development. There is no publicly available record of his published articles or distinctive public writing beyond his professional roles and advisory positions.
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