Former office · data architecture
350+ registers,
one framework
Germany has more than 350 medical registers, each collecting data on a disease, treatment or implant. The Medical Registers Act, introduced to the Bundestag by Nina Warken in May 2026, was designed to give them common rules — and drew sharp questions about privacy and governance.
Layer 01 · definition
What a medical register is
A medical register is a structured, long-term collection of standardised data about patients who share a condition, a treatment or a medical product. Unlike a clinical trial, which tests one question under controlled conditions for a limited time, a register observes routine care over years: who was treated, how, and with what result.
That makes registers valuable in ways other data sources are not. They show how treatments work outside trial populations — in older patients, in people with several illnesses, or in women and men separately. In her speech at the first reading the minister gave exactly this kind of example: registers can show whether medicines work differently depending on sex or age. They can reveal problems with implants that only emerge after years. And they allow hospitals to compare their results with others, which is the basis of quality improvement.
Germany's registers have grown from many initiatives: medical societies, university hospitals, patient organisations and public bodies. Among the examples she named were the AltersTraumaRegister, which documents the treatment of injured older people, and the Central Malignant Melanoma Register. Some registers have their own statutory basis; many do not.
Layer 02 · the problem
Data that "lie unconnected side by side"
In presenting the bill on 21 May 2026, the minister described register data in Germany as lying unconnected side by side. Three kinds of fragmentation lie behind that phrase.
Different legal bases
Registers operate under a patchwork of consent forms, state and federal data-protection rules and institutional policies, making it uncertain what data may be used for which purpose.
Different standards
Variables, formats and coding differ between registers, so data cannot easily be combined or compared — an interoperability problem.
Burden on clinicians
Doctors often report similar data several times to different registers. The bill promised less bureaucracy for those who report.
Layer 03 · the bill
The Medical Registers Act
- German title
- Medizinregistergesetz
- Government bill
- Drucksache 21/5922, 13 May 2026
- First reading
- 21 May 2026, Bundestag
- Committee
- Health Committee (lead)
- Public hearing
- 10 June 2026
- Status, 29 July 2026
- Pending
The bill sets uniform federal rules for medical registers. Its main elements, as described by the government and in reporting on the hearing:
- A register directory listing existing medical registers, to create transparency about what data exist.
- Uniform quality standards for registers across Germany.
- A Centre for Medical Registers (Zentrum für Medizinregister) to review registers for data protection and data quality before they are qualified under the law.
- Two routes to data collection: registers can work with informed consent, or — where complete data are needed to avoid distorted results — with an objection model in which patients' data are included unless they opt out.
- Rules for linkage of register data with each other and with other sources, and simpler reporting for doctors.
„Bundeseinheitliche Regelungen ermöglichen verlässliche Qualitätsstandards für Medizinregister.“
Layer 04 · scrutiny
What experts told the Health Committee
The public hearing on 10 June 2026 showed broad support for the aim and significant disagreement about the safeguards. Positions as reported by the Bundestag's news service (hib) and netzpolitik.org.
Opportunities
- Federal Joint Committee (G-BA) an important first step towards research data infrastructure, though data quality still needs to improve.
- German Medical Association progress towards a more capable, interoperable register landscape.
- TMF (research data platform) supported planned data linkage and quality improvements.
- Eva Luise and Horst Köhler Foundation welcomed the bill and asked for a stronger focus on rare diseases, for which registers are of outstanding importance.
Privacy and governance questions
- Thilo Weichert (Netzwerk Datenschutzexpertise) called the data-protection rules deficient, argued permitted uses extend beyond research to operational purposes with a high risk of misuse, and warned of re-identification through health insurance numbers.
- German Medical Association also criticised insufficient safeguards and registers holding identifying and pseudonymised data at the same time.
- BAG Selbsthilfe asked for stronger protection of vulnerable groups, for example people with HIV, and a central objection mechanism.
- Federal Data Protection Commissioner supported a Greens proposal for an independent trust office, at the Robert Koch Institute, to manage objections and pseudonymisation, and questioned whether the new Centre would be adequately staffed.
- Bitkom called the qualification process impractical and asked for standardised, automated procedures; the GKV-Spitzenverband noted the absence of mandatory registration for register operators.
Layer 05 · design choices
The trade-offs inside the architecture
Every health-data law has to balance the same principles. The matrix shows where the medical-registers debate placed the tension.
| Principle | Case for more data use | Case for more protection | Design lever |
|---|---|---|---|
| Completeness | Consent-only registers can be biased if certain groups opt in less often | Inclusion without active consent weakens individual control | Consent route vs objection route |
| Interoperability | Linked data reveal long-term outcomes no single register can show | Linkage raises the risk of re-identification | Pseudonymisation; who holds the keys |
| Purpose | Quality monitoring and safety need operational use, not only research | Broad purposes are harder to explain and control | Narrow list of permitted uses |
| Governance | A central body can set and enforce standards quickly | Oversight needs independence and resources | Mandate and staffing of the Centre; trust office |
| Burden | Simpler reporting frees clinicians' time | Automation must not bypass patient rights | Standardised interfaces with audit trails |
„Wir schaffen Rechtssicherheit für die Datennutzung.“
Context
Part of a wider data agenda
The Medical Registers Act belongs to a series of German and European laws on health data. The Health Data Use Act of 2024 created a framework for research access to health data, and the European Health Data Space regulation, in force since March 2025, will apply in stages from 2027. In July 2026 the cabinet also adopted the GeDIG bill, which would expand the national research data centre. Together these define how data generated in care can be used for research and quality — and under which protections. See Digital health.
Whatever form the law finally takes, its success will depend less on the statute than on implementation: how many registers go through qualification, whether the Centre for Medical Registers has the capacity to review them, and whether patients trust the safeguards enough not to opt out in large numbers.
Sources & further reading
- Federal Government — speech by Nina Warken on the Medical Registers Act (21 May 2026)
- German Bundestag — first reading, Medical Registers Act
- Bundestag hib — hearing on the Medical Registers Act (10 Jun 2026)
- Federal Data Protection Commissioner — statement for the hearing (PDF)
- Thilo Weichert — statement for the hearing (PDF)
- netzpolitik.org — Medizinregistergesetz: „Ein lebenslanges, unverhältnismäßiges Risiko“ (15 Jun 2026)
- Federal Ministry of Health — data for research and care (Health Data Use Act)