Directory / Open datasets / HDB-0253

National Health Information System (NHIS)

Ministry of Health of Bulgaria

HDB-0253

Bulgaria's centralized electronic health record platform storing and exchanging medical information among healthcare stakeholders with standardized data formats and unified medical terminology coding. As of July 2026, the system contains 764.7 million electronic health documents, 204+ million e-examinations, and provides patient access through the eZdrave portal.

Category

Open dataset

Access

Free registration

Region

Europe — Bulgaria

Coverage

Bulgaria

Size

764.7 million documents (as of July 2026)

License / terms

Public domain

Data types

electronic health records, examinations, prescriptions, referrals, laboratory results, vaccinations

EHR system patient portal

Visit official site ↗

Record HDB-0253 · last verified 2026-08-06 · listed in Open datasets

Related records

MIMIC-IV

MIT Laboratory for Computational Physiology De-identified electronic health records from patients admitted to Beth Israel Deaconess Medical Center, covering ICU and emergency department stays from 2008 onward. The de facto standard dataset for clinical machine learning research, with vitals, labs, medications, procedures and linked clinical notes modules. Open dataset Credentialed HDB-0002

eICU Collaborative Research Database

MIT LCP / Philips Healthcare Multi-center ICU database from the Philips eICU telehealth program, covering 200,000+ admissions across hospitals in the United States. Complements MIMIC with multi-center generalizability for critical care research. Open dataset Credentialed HDB-0003

NHANES

CDC / National Center for Health Statistics The National Health and Nutrition Examination Survey combines interviews, physical examinations and laboratory tests on a representative sample of the US population, released in continuous two-year cycles since 1999. A workhorse dataset for epidemiology and public health research. Open dataset Open access HDB-0004

SEER Cancer Registry

National Cancer Institute The Surveillance, Epidemiology, and End Results program collects cancer incidence, treatment and survival data from population-based registries covering roughly half of the US population. The reference source for US cancer statistics. Open dataset By application