Revision History

California Health & Human Services Agency Data De-Identification Guidelines (DDG)Template Edition 2.0 Template - October 24, 2025

See individual department DDGs for more information about the revision history of their versions, including effective date, author, and a brief description of changes.

DDG Template Edition History Summary

See Appendix J for the DDG Template’s full development and revision history.

Edition	Date	Primary Author	Brief Description of Changes
1.0	9/23/16	L. Scott, MD, MPH	The First Edition was approved by CalHHS for implementation.
2.0	10/24/25	D. Aggarwal, PhD	The Second Edition was approved by CalHHS for implementation.