CRESO (Certification Requirements for Entities in the State of New York for Offices) is the NYC and NYS DOH compliance framework for dental offices, podiatry offices, and other outpatient practices that operate X-ray equipment. If your dental or podiatry office uses X-ray equipment in New York City or New York State, CRESO certification is required. RPS provides CRESO compliance consulting for dental and podiatry offices throughout NYC and NYS.