German Medical Liability Law

The Treatment Contract: BGB Section 630a

The treatment contract (Behandlungsvertrag) was codified in the Bürgerliches Gesetzbuch (BGB) at §§ 630a–630h by the Patientenrechtegesetz of 2013, which for the first time systematised patient rights in a single legislative instrument. Prior to 2013, medical liability was governed by general contract and tort law as developed by the courts, particularly the Bundesgerichtshof (BGH). Section 630a(1) defines the treatment contract as an agreement by which the person providing treatment (the medical practitioner or hospital operator) promises to provide medical treatment and the patient promises to pay the agreed remuneration. The contract is a contract for services (Dienstvertrag), not a contract for a work result (Werkvertrag): the physician undertakes to provide treatment according to the professional standard but does not guarantee a cure. Section 630a(2) provides that the treatment must be provided in accordance with the generally accepted professional standards (allgemein anerkannte fachliche Standards) at the time of treatment, unless another standard is agreed. The burden of proof for a breach of the professional standard lies with the patient (§ 630h), but the law establishes important presumptions in the patient’s favour where a gross breach of professional duty (grober Behandlungsfehler) has occurred.

Physician Liability: Arzthaftung

Physician liability (Arzthaftung) arises from both contractual breach under § 280 BGB (in conjunction with the treatment contract) and delictual liability under § 823(1) BGB for injury to life, body, or health. The BGH has developed extensive case law on the standard of care: the physician must exercise the degree of care expected of a reasonably competent specialist in the same field, measured against objective professional standards. Liability attaches not only for errors in diagnosis and treatment but also for failures of therapeutic aftercare (therapeutische Nachsorge) and coordination between treating physicians. Gross treatment errors (grobe Behandlungsfehler) trigger a reversal of the burden of proof under § 630h(2) BGB: if the physician has committed a gross error that is objectively inexcusable and contrary to established medical practice, it is presumed that the error caused the injury. The BGH has held that a gross error exists where the physician has clearly violated established medical rules or findings; the error must be the kind “that from an objective medical standpoint should not occur” and the threshold is intentionally set high to avoid routine errors from triggering the presumption. Hospital liability follows the same principles but includes organisational liability (Organisationsverschulden): the hospital operator must ensure that treatment is organised safely, including adequate staffing, equipment, and supervision of junior doctors.

Informed Consent

Informed consent (Einwilligung) is a cornerstone of German medical law and is grounded in the patient’s right to self-determination (Selbstbestimmungsrecht), which is constitutionally protected under Articles 1 and 2 of the Basic Law. The BGH held in the foundational Herzschnitt case (BGHZ 29, 46) that any medical intervention, even if performed according to the professional standard, constitutes a technical assault (Körperverletzung) unless the patient has given valid consent. Section 630d BGB codifies this requirement: the physician must obtain the patient’s informed consent before providing treatment. Consent requires disclosure (Aufklärung) covering the nature, scope, and expected benefits of the treatment, as well as the risks (Risiken) and alternatives (Alternativen) — including the possibility of foregoing treatment. The disclosure must be made in person by the treating physician (the Aufklärungsgespräch) and in a manner that enables the patient to make a reasoned decision. The BGH has specified that the disclosure must occur in a timely manner — generally the day before an inpatient procedure — and must be documented. The burden of proof for proper disclosure lies with the physician under § 630h(2). The therapeutic privilege is recognised very narrowly: the physician may withhold information only if it would demonstrably cause serious harm to the patient’s health, and even then the limits are strictly construed.

Medical Confidentiality

Medical confidentiality (ärztliche Schweigepflicht) is protected by professional regulation (§ 9 of the Bundesärzteordnung, BÄO), criminal law (§ 203 StGB — breach of private secrets), and the General Data Protection Regulation (GDPR). The physician may disclose patient information only with the patient’s explicit consent, a statutory authorisation, or in response to a court order. Section 203 StGB criminalises the unauthorised disclosure of third-party secrets by physicians and other health professionals, punishable by imprisonment for up to one year. Exceptions to confidentiality include mandatory reporting of certain infectious diseases under the Infektionsschutzgesetz (IfSG), notification of suspicious deaths to law enforcement, and the disclosure required for health insurance billing purposes under social security law. The physician’s duty of confidentiality survives the patient’s death, and disclosure of a deceased patient’s information may be actionable by the patient’s relatives under the general personality right (Allgemeines Persönlichkeitsrecht). The intersection of medical confidentiality with data protection law, particularly the GDPR requirements for processing special categories of personal data (Article 9), has become increasingly significant, and the Bundesbeauftragter für den Datenschutz und die Informationsfreiheit (BfDI) has issued detailed guidance on the processing of health data.

The Patientenrechtegesetz and Procedural Aspects

The Patientenrechtegesetz (Patient Rights Act) of 2013 codified previously judge-made rules and introduced several innovations. Besides the treatment contract provisions, it strengthened patient information rights, including a right to access the complete medical record (§ 630g BGB) and a right to copies of medical documents. The Act established the Arztinformationssystem and mandated that physicians maintain professional liability insurance. Procedurally, most medical liability claims are heard before the civil chambers of the Landgericht (Regional Court) if the amount in dispute exceeds €5,000. Expert evidence is almost invariably required. The Sachverständigenrat für die Begutachtung von Behandlungsfehlern publishes annual statistics on medical error claims; roughly 12,000 claims are filed annually, and the MDK (Medical Service of the Health Funds) or private experts assess the merits of each claim. The out-of-court dispute resolution mechanism provided by the Schlichtungsstellen für Arzthaftpflichtfragen (arbitration boards for medical liability) offers a cost-effective alternative to litigation. These boards, established by the medical associations (Landesärztekammern), issue non-binding opinions; parties who accept the opinion avoid costly litigation, and approximately 60 percent of cases are resolved at this stage.