When the hospital or medical group answers for care

Modern care is delivered by organizations. The physician who signs the note works inside a staffing model, an electronic record configured by someone else, a credentialing system, a formulary, a call schedule and a set of policies that may or may not be achievable on a given night. When a patient is harmed, the legal question is rarely only "what did this physician do?" It is also whether an institution is responsible for that physician's conduct, for its own conduct, or for both.

California law reaches institutions through several distinct doctrines. They have different elements and different proof, and they are frequently blurred together in complaints, in defense briefs and in public discussion. This chapter separates them: liability for someone else (vicarious liability and ostensible agency); liability for the institution's own negligence (corporate negligence, including credentialing); duties imposed by statute and regulation; and the structural features of California law — the bar on the corporate practice of medicine and the separate MICRA category for institutions — that shape who is sued and how.

Vicarious liability: when an institution answers for another's negligence

The ordinary rule of respondeat superior makes an employer liable for the negligence of employees acting within the scope of employment. In a hospital, that typically covers employed nurses, pharmacists, technicians, respiratory therapists and other staff. The plaintiff still must prove that the employee's conduct fell below the applicable standard of care and caused the injury; the doctrine supplies the defendant, not the negligence.

Physicians are different in California because most are not hospital employees. The state's prohibition on the corporate practice of medicine (discussed below) means that many physicians who work in hospitals are independent members of the medical staff, members of contracted groups, or employees of separate medical corporations. That structure would leave a patient who was treated in a hospital emergency department without a remedy against the hospital for the emergency physician's negligence — if not for ostensible agency.

Ostensible agency

Ostensible (apparent) agency makes a hospital liable for the negligence of a physician who is not its employee when the hospital's conduct led the patient reasonably to believe the physician was acting for the hospital. In Mejia v. Community Hospital of San Bernardino (2002) 99 Cal.App.4th 1448, a patient sought care at a hospital emergency department for neck pain; a radiologist who was not a hospital employee misread her films. The Court of Appeal reversed a nonsuit for the hospital, concluding that ostensible agency was a question for the jury because the patient sought treatment at the hospital and there was no evidence she should have known the negligent physician was not the hospital's agent.

The decision reflects the practical shape of the doctrine. Two elements are usually examined: whether the hospital held itself out as the provider of care, and whether the patient looked to the hospital, rather than to an individual physician, for that care. Where a patient comes to a hospital for emergency services and is treated by whoever is on duty, those elements are often satisfied unless the hospital gave notice the patient could reasonably be expected to understand. A consent form stating that physicians are independent contractors is relevant evidence, but courts examine whether it was meaningfully communicated in the circumstances — a form signed in pain at triage may carry little weight.

Ostensible agency is weaker where the patient chose the physician first and came to the hospital because that physician practiced there, as with many elective surgeries. It is also a doctrine about liability, not about the standard of care: the plaintiff still must prove the physician's negligence and causation with expert testimony.

Corporate negligence: the institution's own duties

A hospital can also be liable for its own negligence, independent of any physician's. California recognized this in Elam v. College Park Hospital (1982) 132 Cal.App.3d 332, which held that a hospital is accountable for negligently screening the competency of its medical staff to ensure the adequacy of medical care rendered to patients at its facility. The court reasoned that the hospital is in a better position than the patient to evaluate physicians who use its facilities and to prevent harm through credentialing and privileging.

Corporate negligence extends beyond credentialing. Claims commonly allege that the institution failed to:

• Credential and privilege appropriately — granting or renewing privileges without reasonable review of competence, or ignoring information it had about a physician's performance;
• Supervise and monitor — failing to act on known patterns of unsafe practice;
• Maintain safe systems — equipment, medication storage and dispensing, alarm management, result routing and electronic-record configuration;
• Staff adequately — nurse staffing below legal requirements, or coverage arrangements that left no qualified person available to respond; and
• Adopt and follow reasonable policies — for example, for escalation of deteriorating patients, communication of critical results, or transfer.

These are institutional decisions, and the evidence comes from institutional sources: staffing grids, call schedules, policy histories, equipment logs, system configuration, budget decisions and committee minutes. The institutional technology chapter develops how control over the electronic record and alerting systems is mapped before fault is assigned.

Credentialing claims and the limits of discovery

Negligent-credentialing claims face a structural obstacle: Evidence Code section 1157 protects the proceedings and records of medical-staff committees responsible for evaluating and improving the quality of care from discovery, subject to its exceptions. The plaintiff often cannot obtain the credentialing committee's deliberations. Such claims are therefore usually proved, if at all, from information outside the protected process — public discipline, prior judgments and settlements, information the hospital received from sources other than its committees, and the physician's documented training and experience against the privileges actually granted. The peer review and mortality review chapter explains what section 1157 does and does not cover.

Statutory and regulatory duties

Hospitals operate under licensing statutes and regulations that set specific requirements. A violation does not automatically establish malpractice, but it can change how negligence is proved.

Negligence per se. Evidence Code section 669 creates a presumption that a person failed to exercise due care if the person violated a statute, ordinance or regulation of a public entity; the violation proximately caused the injury; the injury resulted from an occurrence of the kind the law was designed to prevent; and the injured person was in the class the law was meant to protect. The presumption can be rebutted. It does not dispense with causation, and many regulatory requirements (record-keeping formats, filing deadlines) are not designed to prevent the injury at issue.

Nurse-to-patient ratios. California is distinctive in requiring minimum licensed nurse-to-patient ratios in general acute care hospitals, by unit type (Health and Safety Code section 1276.4 and the implementing regulations in Title 22). A plaintiff who shows that a unit was staffed below the required ratio when a deteriorating patient's signs were missed has evidence of institutional negligence — but must still show that adequate staffing probably would have led to timely recognition and a different outcome.

Emergency services. Health and Safety Code section 1317 requires licensed hospitals with emergency departments to provide emergency services and care to any person requesting them for an emergency condition, without regard to ability to pay or insurance status. The federal Emergency Medical Treatment and Labor Act (EMTALA, 42 U.S.C. § 1395dd) independently requires participating hospitals to provide an appropriate medical screening examination and, where an emergency medical condition exists, stabilizing treatment or an appropriate transfer. EMTALA gives an individual a civil action against the hospital (not against individual physicians) and has its own two-year limitation period. It is not a federal malpractice statute: its focus is screening and stabilization, not the quality of every diagnostic judgment.

Policies are evidence, not the standard. A hospital's own policy is relevant to what the institution expected and what its staff were trained to do. It does not by itself define the legal standard of care, which is the reasonable practice of the profession. A policy that demands more than the standard of care does not make every deviation negligent; a policy that demands less does not excuse a departure from reasonable practice.

The corporate practice of medicine and how California care is organized

California generally prohibits corporations and other lay entities from practicing medicine or employing physicians to do so. Business and Professions Code section 2400 states the rule; section 2401 creates exceptions, including clinics operated primarily for medical education by approved nonprofit medical schools, and clinics operated under Health and Safety Code section 1206, subdivision (p), which may employ physicians — but which may not interfere with, control or otherwise direct a physician's professional judgment. Other narrow categories exist.

The bar has practical consequences in malpractice cases:

• Who the defendants are. A single hospital encounter can involve a hospital, a contracted emergency group, a radiology group, a hospitalist group, an anesthesia group and an independent consultant. Each is a separate defendant with its own insurer and counsel.
• Ostensible agency matters more. Because hospitals usually cannot employ physicians, ostensible agency becomes the principal path to hospital liability for physician negligence.
• Control and judgment. When an institution's systems, staffing or policies constrain a physician's choices, the question whether the institution was directing professional judgment — or merely setting reasonable operating rules — can arise in both malpractice and regulatory contexts. The site's corporate practice of medicine dossier explains the doctrine and its current policy debates.

Damages, deadlines and procedure for institutional defendants

The ordinary malpractice rules apply to hospitals and other health care institutions as "health care providers": the deadlines in Code of Civil Procedure section 340.5, the 90-day notice requirement of section 364, and MICRA. Under the AB 35 amendments to Civil Code section 3333.2, health care institutions form their own category for the noneconomic damages limitation, separate from individual health care providers, and no institution is liable for noneconomic losses in more than one category. The MICRA chapter explains the categories and the 2026 amounts.

Public hospitals and county or district facilities add the Government Claims Act: a written claim generally must be presented within six months after accrual before suit (Government Code section 911.2), and suit timing then follows section 945.6. Federally deemed health centers raise the Federal Tort Claims Act. Both are explained in special settings, and both can be missed when a patient does not realize that the clinic or hospital was a public or federally deemed entity.

How an institutional case is built and defended

For institutional clients, the same table is a prevention checklist: each plaintiff's row describes evidence a hospital can review before any claim exists.

Fictional example: a radiology read in an emergency department

Fictional teaching example. A patient arrives at a hospital emergency department after a fall. The emergency physician, employed by a contracted emergency group, orders imaging; a teleradiologist employed by a separate company reads it remotely overnight and misses a fracture. The patient is discharged and later suffers a complication. The patient never saw or chose either physician and signed a general consent at triage that contained a sentence about independent contractors.

A plaintiff may sue the emergency physician, the emergency group, the teleradiologist, the teleradiology company and the hospital — the hospital on ostensible agency for both physicians and on corporate negligence if, for example, the overnight reading arrangement lacked a reasonable process for preliminary-read discrepancies. The hospital will point to the consent language and to the independence of both groups. Under Mejia, whether the triage sentence gave the patient meaningful notice is likely a jury question. Each defendant's MICRA category, insurer and expert must be identified early.

Questions each side should ask

Physicians and medical staff leaders. Are the hospital's notices about physician independence accurate and meaningfully communicated? Do privileging decisions document the training and experience that support each privilege? Are discrepancy and critical-result processes defined across contracted groups?

Institutional leaders. Do staffing records demonstrate ratio compliance unit by unit? Who owns the configuration of alerts, result routing and escalation? When policies change, is the history preserved?

Plaintiff's counsel. Who employed each clinician, and did the patient have any reason to know? What institutional decisions — staffing, configuration, credentialing — plausibly contributed, and can they be proved from sources outside section 1157? Is any defendant a public or federally deemed entity with a shorter claim deadline?

Defense counsel. Was notice of independent status actually given and understood? Is the plaintiff converting a policy deviation or regulatory violation into negligence without the elements of Evidence Code section 669? Which MICRA category applies to each defendant?

Sources

• Mejia v. Community Hospital of San Bernardino (2002) 99 Cal.App.4th 1448: opinion (Justia reproduction).
• Elam v. College Park Hospital (1982) 132 Cal.App.3d 332: opinion (Justia reproduction).
• Evidence Code § 669: official text; § 1157: official text.
• Business and Professions Code § 2400 and § 2401: official text of § 2401.
• Health and Safety Code § 1276.4 (nurse-to-patient ratios): official text; § 1317 (emergency services): official text.
• Emergency Medical Treatment and Labor Act, 42 U.S.C. § 1395dd: text (U.S. Code).
• Civil Code § 3333.2 (as amended by AB 35): official text; Government Code § 911.2: official text.

General legal and clinical education; not individual legal or medical advice.