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. 2023 Dec 5;6(4):ooad100. doi: 10.1093/jamiaopen/ooad100

Table 1.

National health databases in Estonia.

Data source Content Terminologies
Electronic health records (EHR)

  • inpatient and outpatient case summaries (including medical history, lab tests, and their results, procedures, drugs, and allergies)

  • referrals and their responses

  • ICD-10 diagnosis codes

  • SNOMED CT or local codes for procedures and results

  • LOINC codes for lab tests

  • TNM codes and cancer stages

  • Other terminologies used in free text parts of clinical notes
Drug prescriptions

  • product name and code

  • ATC code

  • amount

  • administration guidelines

  • purchase date and location

  • the healthcare provider who issued the drug

  • ICD-10 diagnosis

  • ATC codes

  • Local drug product codes

  • ICD-10 diagnosis codes
Health insurance claims

  • diagnosis codes

  • services provided (eg, admissions, lab tests, procedures, drug administrations)

  • surgical procedures conducted

  • ICD-10 diagnosis codes

  • Local service codes

  • NCSP codes

Abbreviations: ATC, Anatomical Therapeutic Chemical classifications; ICD-10, International Classification of Diseases 10th revision; LOINC, Logical Observation Identifiers Names and Codes; NCSP, Nordic Medico-Statistical Committee Classification of Surgical Procedures; SNOMED CT, SNOMED Clinical Terms; TNM, Classification of Malignant Tumors.