Guy Fish, MD, MBA, mission-driven to re-establish thriving communities utilizing health equity frameworks, is Codman Square Health Center’s CEO. Dr. Fish’s trailblazing, multi-industry career spans international for-profit and nonprofit sectors from Wall Street and Venture Capital to ER and solo-clinical practice, and from leading innovative companies to consulting to government entities, hospitals, Fortune 50 biotechs, and startups at every stage. As President and CEO of Greater Lawrence Family Health Center (with ten sites serving 68,000 patients and a Family Medicine Residency), Dr. Fish applied his strategic vision, transformed GLFHC, and turned a projected $4 Million deficit into an $8 Million surplus. While navigating the unprecedented and tumultuous international pandemic, Dr. Fish successfully increased GLFHC’s revenues 55% to more than $100 Million; improved healthcare delivery, patient and clinician satisfaction, and climate resiliency; grew staff 30% to 850; overhauled systems; and expanded behavioral health, mobile health, and substance use services. In Fall 2023, upon reading of imminent Steward System closures, Dr. Fish combined his multi-stakeholder lens with his business and healthcare acumen to craft a revolutionary health delivery model as a health equity solution to serve impacted patients. Dr. Fish’s brainchild was later adapted into one of MA’s first viable, state-approved frameworks for a small healthcare institution to acquire a bankrupt medical campus. 

Initially a solo practice internist in rural Delaware, inspired to effect healthcare reform, Dr. Fish reinvented himself and became one of the first MD/MBA’s in 1994. He gained expertise in analyzing barriers and market failures in healthcare, and creating sustainable solutions to health equity while a BCG consultant; Wall Street sell-side analyst focused on healthcare innovation; and C-Suite-level advisor for medtech, pharma, care delivery, and AI diagnostic firms. At FS Ventures and FSI, Fish’s market assessments and strategic council resulted in more than $4 Billion in value creation over ten years. Recently nominated by Mayor Wu to sit on Boston’s Board of Health, Dr. Fish serves on boards at Boston Medical Center, Capital Link, MLCHC as Vice Chair of Government Affairs, and the MA Health Policy Forum; and as advisor to NACHC (Finance, Board Leadership, and Workforce) and the Eschelman Institute. Dr. Fish's more than 18 prior board roles range from Trustee of BIDMC, Chair of BIDMC’s Medical Education and Patient Care Committees, and Chair of MA’s Medical Registration Board, to Dubai HealthCare Licensing Board, Altarum Institute, Etiometry, Metabolon, Proteus, and C3 (a national accountable care organization).

Originally from Ohio, Dr. Fish earned a Harvard BA in Biochemistry; Yale MD; Case Western Internal Medicine Residency; and Yale MBA (where he coined the concept “Accountable Care Organizations” in 1993). Dr. Fish's multiple distinctions include Harvard’s Alumni Association Award for exceptional community service and transformative anti-racism initiatives, co-authoring patents, and completing two Boston Marathons.