National registries
Finnish national registries have complete population-wide coverage: all citizens are included in these registries. All Finns have a unique personal ID number, which allows combining individual-level data from various data sources reliably and enables longitudinal data collection.
National registries contain core clinical information, such as ICD-10 codes, drug prescription data and causes of death. The national registries most commonly used for health research include the Care Register for Health Care (Finnish Institute for Health and Welfare), the Drug Reimbursement Register (Social Insurance Institution), the Social Benefits Register (Social Insurance Institution), and the Cause of Death Register (Statistics Finland).
Findata: data permit authority for the social and health care sector
https://findata.fi/en/data/
Read more about the Finnish health registers from the FinRegistry research project website:
https://www.finregistry.fi/finnish-registry-data