Despite the long tradition of decentralization in health care worldwide, there remains limited evidences on its impact on health outcomes. In this paper, we investigate how the expansion of local government incomes in the Philippines influences household demand for healthcare under a decentralized setting. Using a natural experiment, we find that greater transfers from the national government to local governments do not necessarily lead to greater demand for antenatal care services among pregnant women. This may be a consequence of local public spending on health services not responding to greater national transfers. Local government income from locally generated sources, on the other hand, are consistently positively associated with greater antenatal care demand. We also document some evidence of inter-jurisdictional spillovers in healthcare, which may potentially limit the effectiveness of decentralized healthcare service delivery.