Mae'r DSCNs a’r CDSCNs a ganlyn wedi'u cymeradwyo gan Fwrdd Safonau a Llywodraethu Gwybodaeth Cymru. Bydd newidiadau yn cael eu cynnwys yng Ngeiriadur Data GIG Cymru. Gwybodaeth dechnegol sydd ar gael yn Saesneg yn unig.
The following DSCNs & CDSCNs have been approved by the Welsh Information Governance and Standards Board. Changes will be reflected in the NHS Wales Data Dictionary.
| DSCN/CDSCN Reference (Wales) | (E) DSCN /WHC /Ministerial Letter Ref | Description | Issue Date | Implementation Date | Data Dict. Ver. | 
| N/A | Revisions to the Emergency Department Data Set | 22nd January 2010 | 1st February 2010 / 1st April 2010 (Refer to DSCN) | v3.1 | |
| 
 | N/A | Updates to Crisis Resolution Home Treatment Services Data Collection | 7th April 2010 | 1st April 2010 | v3.1 | 
| EH/ML/019/10 MB/EH/0326/10 | Inpatient and Day Case Admissions and First Outpatient Appointment Waiting Times (PP01W) | 14th May 2010 | 1st April 2010 | v3.1 | |
| EH/ML/019/10 MB/EH/0326/10 | Angiogram Waiting Times | 14th May 2010 | 1st April 2010 | v3.1 | |
| EH/ML/041/09 | NHS Wales Short Stay Surgery Basket of Procedures | 2nd June 2010 | 1st April 2010 | v3.1 | |
| ML/EH/001/10 | Outpatient Activity Data Validity Standards | 2nd June 2010 | N/A (Data Dict Update) | v3.1 | |
| WHC (2008) 007 | APC Data Validity Standards | 2nd June 2010 | N/A (Data Dict Update) | v3.1 | |
| ML/EH/010/08 | Outpatient Referral Data Set (Unique Key) | 19th July 2010 | 1st September 2010 | v3.1 | |
| n/a | Revisions to Emergency Department Data Set: Diagnosis Types | 19th July 2010 | July 2010 | v3.1 | |
| n/a | KP90 – Admissions, Changes in Status and Detentions Under the Mental Health Act 1983 | 19th July 2010 | July 2010 | v3.1 | |
| 
 | All Wales Specialist Palliative Care Data Set | 4th August 2010 | October 2010 | v3.2 | |
| n/a | Community Health Returns: KC55, KC57, KH14 | 25th October 2010 | October 2010 | v3.2 | |
| 
 | RTT PTR Cessation | 5th December 2010 | October 2009 | v3.2 |