The NCCHD is maintained by NHS Wales Information Service (NWIS) and is comprised of extracted records of all health board Child Health office database across Wales.
Cynhelir y gronfa ddata genedlaethol hon gan Wasanaeth Gwybodaeth GIG Cymru ac mae'n cynnwys cofnodion a dynnir o gronfeydd data swyddfa Iechyd Plant pob bwrdd iechyd ledled Cymru.