Phipps Houses Services, Inc. (PHSI), a full-service property management firm, is one of the largest managers of assisted housing in the nation. PHSI manages over 13,000 housing units in New York City and oversees combined annual operating budgets of approximately $140 million. It has a long history of working with all levels of government agencies and has developed a specialty in government-assisted housing. PHSI is also the largest manager of employer-assisted housing for medical and educational institutions in New York State. PHSI is a wholly owned subsidiary of Phipps Houses.