Katy Golvala, Erica E. Phillips and Dave Altimari / CT Mirror News CT’s big hospital systems are buying up private practices and small hospitals. What does that mean? Katy Golvala, Erica E. Phillips and Dave Altimari / CT Mirror In Connecticut, two systems — Yale New Haven and Hartford HealthCare — are on the brink of owning more than half the 27 hospitals in the state.