Categories/Classifications of Incidents Requiring Reporting As per OPWDD, there are 4 Categories and 26 Classifications of Incidents Requiring Reporting. When referring to the OPWDD Categories/Classifications chart, please note that ISSNY is a voluntary-operated and noncertified service provider. OPWDD Categories/Classifications of Incidents Requiring Reporting (Part 624) Effective January 1, 2016 Classification of Incidents Shortcut (PDF) Updated 04/14/26.