22. Appendix J: CalHHS DDG Template Development and Revision History
This section outlines the development, review, and approval stages for the CalHHS DDG Template Editions 1.0 and 2.0.
In 2015, the CalHHS Data Subcommittee requested the convening of the CalHHS Data De-Identification Workgroup to develop the DDG.
Pre-draft
3/15/15
L. Scott
Planning Meeting Part 1 – Participants included DHCS, CDPH, OSHPD, OHII
Pre-draft
3/20/15
L. Scott
Planning Meeting Part 2 - Participants included DHCS, CDPH, OSHPD, OHII
Pre-draft
4/7/15
L. Scott
Present Objectives for the project and use the DHCS PAR-DBR as an example
Pre-draft
4/23/15
L. Scott
Presentations from OSHPD and CDPH regarding current processes and approach to small cell sizes
Pre-draft
5/5/15
L. Scott
Discuss concept of uniqueness as a way to measure risk for re-identification and gather input from Departments/Offices regarding DDG variables and topics
0.1
5/26/15
L. Scott
Initial draft for review which was based on the DHCS PAR-DBR Guidelines dated 8/25/14 and conversations at the CalHHS Data De-Identification Workgroup meetings
0.1
5/27/15
L. Scott
Review initial draft DDG – Focus on new sections of the document
0.1
6/8/15
L. Scott
Review initial draft DDG – Focus on Data Assessment for Public Release Procedure
0.1
May-June 2015
L. Scott
Meet with each department/office individually
0.2
6/29/15
L. Scott
Additions made based on feedback:
· CalHHS Data De-Identification Workgroup meetings on May 27, 2015, and June 8, 2015
· Department-specific meetings
0.2
6/30/15
L. Scott
Review draft DDG 0.2
0.2
July 2015
L. Scott
Departments/offices vet the DDG within their departments/offices
0.3
8/5/15
L. Scott
Additions and changes based on feedback from all departments with specific written comments from CDPH, OSHPD, DCSS, CDSS, MHSOAC
0.3
8/6/15
L. Scott
Review draft DDG 0.3
0.3
8/21/15
L. Scott
Received input from the CalHHS Risk Management Committee
0.3
9/14/15
L. Scott
Progress update for DDG Workgroup and discussion of additional topics
0.3
12/18/15
L. Scott
Presentation from NORC to review their findings of the draft DDG
0.3
1/8/16
L. Scott
Receive final recommendations from NORC
0.4
1/22/16
L. Scott
Revisions based on recommendations from:
· NORC
· CalHHS DDG Workgroup
· CalHHS Risk Management Subcommittee and associated Legal and Privacy Workgroup
Specific written comments from CDPH, CDSS
0.4
Jan. 2016
L. Scott
Provide DDG 0.4 to DDG Workgroup
0.4
2/18/16
L. Scott
Review and discussion of draft DDG 0.4 with the DDG Workgroup
0.5
3/18/16
L. Scott
Revisions based on comments from CDPH, CDSS, OSHPD, DHCS
0.5
3/18/16
L. Scott
Provide DDG 0.5 with outstanding comments from the DDG Workgroup to the Data Subcommittee
0.6
4/4/16
L. Scott
Revisions based on feedback from and discussion with the Data Subcommittee
0.6
4/18/16
L. Scott
Provide revised draft DDG to the Data Subcommittee
0.7
5/3/16
L. Scott
Revisions based on feedback from and discussion with the Data Subcommittee
0.7
5/24/16
L. Scott
Provide draft DDG 0.7 from the CalHHS Data Subcommittee to the CalHHS Governance Advisory Council. The Advisory Council shared DDG 0.7 with the other subcommittees and discussed DDG 0.7 at the 6/8/16 meeting.
0.8
6/17/16
L. Scott
Revisions based on direction from the CalHHS Governance Advisory Council and input from the CalHHS Risk Management Committee
0.8
7/6/16
L. Scott
CalHHS Governance Advisory Council discussed DDG 0.8 at its meeting
0.9
7/6/16
P. Cervinka
Revisions based on clarification from the CalHHS Governance Advisory Council
0.10
7/7/16
L. Scott
Provide draft DDG 0.10 to the CalHHS Undersecretary
0.10.1
7/11/16
L. Scott
Formatting and citations edits to be consistent with previous DDG 0.8
1.0
9/23/16
L. Scott
Revisions based on direction from the CalHHS Undersecretary. Approved as Edition 1.0 for implementation.
1.0
5/24/23
L. Scott
DDG Template Workgroup convenes a Scoring Criteria subgroup to begin DDG updates
1.0.1
May - July 2023
D. Aggarwal
DDG Template Workgroup – Scoring Criteria subgroup conducts a literature search to address scoring update topics and holds weekly meetings to develop proposals
1.0.2
7/19/23
D. Aggarwal
Scoring Criteria subgroup scoring proposals and language revisions prepared for presentation to the DDG Template Workgroup
1.1
7/20/23
D. Aggarwal
Revisions based on DDG Template Workgroup input on proposals developed by the Scoring Criteria subgroup during weekly meetings from May to July 2023
1.1
August -September 2023
D. Aggarwal
Weekly scoring criteria subgroup meetings to develop proposals based on DDG Template Workgroup feedback
1.2
9/21/23
D. Aggarwal
Revisions based on DDG Template Workgroup input on proposals developed by a Scoring Criteria subgroup during weekly meetings, including to address topic High-Risk Populations
1.2
October 2023
D. Aggarwal
Scoring Criteria subgroup meets to prepare proposed updates for review by the DDG Template Workgroup
1.3
10/19/23
D. Aggarwal
Revisions based on DDG Template Workgroup input on proposals developed by a Scoring Criteria subgroup during weekly meetings, including to address topic Language Spoken
1.3
November- December 2023
D. Aggarwal
Scoring Criteria subgroup works on language and scoring updates for additional topics based on feedback from the DDG Template Workgroup
1.4
12/21/23
D. Aggarwal
Revisions based on DDG Template Workgroup input on proposals developed by the Scoring Criteria subgroup, including to address topics Age Range, Assess Potential Risk, and Immigration Status
1.4
January-October 2024
D. Aggarwal
Scoring Criteria subgroup works on language and scoring updates based on feedback from the DDG Template Workgroup
1.5
12/19/24
D. Aggarwal
Revisions based on DDG Template Workgroup input on proposed updates developed by the Scoring Criteria subgroup. The Workgroup reviewed suggested revisions in November and December for topics including Artificial Intelligence, Data with More Specificity, Expected Payer, Geography, High-Risk Populations, Other Variables, Race/Ethnicity details based on new OMB/AB 91 standards, Risk with Increased Granularity, SOGI, Special Scenarios, Suppression Rules, Survey Data, and Statistical Masking. The Workgroup approved the DDG draft.
1.5
1/23/25
D. Aggarwal
Draft DDG 1.5 presented to the Peer Review Team
1.5
February-March 2023
D. Aggarwal
DDG Template Workgroup - Scoring Criteria subgroup develops updates based on Peer Review Team feedback
1.5
4/14/25
D. Aggarwal
DDG Template Workgroup reviews Scoring Criteria subgroup proposed updates
1.6
4/18/25
D. Aggarwal
DDG Template Workgroup approves Scoring Criteria subgroup’s revisions based on Peer Review Team feedback and discussion
1.6
4/24/25
D. Aggarwal
DDG 1.6 updates presented to the Peer Review Team
1.6
5/9/25
D. Aggarwal
Peer Review Team approves DDG 1.6
1.6
May 2025
D. Aggarwal
DDG 1.6 updates presented to the Data, Risk Management, and JEDI Subcommittees
1.6
June-August 2025
D. Aggarwal
DDG Template Workgroup addresses feedback from the Data, Risk Management, and JEDI Subcommittees and develops updates
1.7
9/8/25
D. Aggarwal
Revisions based on feedback from the Data, Risk Management, and JEDI Subcommittees, including addressing the topics: Insurance Coverage and Expected Payer/ Public Assistance and Means-Tested Programs
1.7
September 2025
D. Aggarwal
Peer Review Team reviews updates based on the Subcommittees’ feedback and approved DDG 1.7 in early October
1.8
10/3/25
J. Schwartz/ A. Rykaczewska
Revisions based on feedback from the Agency General Counsel and Chief Equity Officer
1.8.1
10/9/25
D. Aggarwal
Addition of Open Data Portal resource link for population tables
1.9
10/16/25
D. Aggarwal
CalHHS Interdepartmental Advisory Council (IDAC) reviewed and approved
2.0
10/24/25
D. Aggarwal
CalHHS Undersecretary reviewed and approved Edition 2.0 for implementation
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