What is the difference between malpractice and adverse outcome?

Medical malpractice is negligent, reckless, or unskilled conduct by a professional that causes harm to the patient. An adverse outcome is an undesired consequence that occurs despite proper medical conduct, arising from inherent treatment risks. Only malpractice generates civil liability.

Who bears the burden of proof in malpractice cases?

As a rule, doctor liability is fault-based, and the patient must prove negligence (art. 14, paragraph 4, CDC). However, the judge may reverse the burden when the patient is disadvantaged. Hospitals and clinics face strict liability (no need to prove fault).

What is the statute of limitations for malpractice claims?

The limitation period is 5 years for consumer relations (art. 27, CDC) or 3 years for general civil liability (art. 206, paragraph 3, V, CC). The period starts from knowledge of the damage, which in medical cases may be years after the procedure.

What types of damages can be compensated?

Material damages (medical expenses, lost earnings, future treatments), moral damages (psychological suffering, loss of quality of life), and aesthetic damages (permanent physical alterations) can be compensated. Moral and aesthetic damages can be combined per STJ Precedent 387.

Medical Malpractice in Brazil: Complete Guide 2026

Direct Answer

Medical malpractice liability in Brazil is predominantly fault-based for individual practitioners (requires proof of negligence) and strict for hospitals and clinics (regardless of fault). Malpractice is distinguished from adverse outcomes by the presence of negligence, recklessness, or lack of skill. Expert evidence is the primary means of proof, and compensable damages include material, moral, and aesthetic, which may be combined (STJ Precedent 387).

Legal Foundation

Medical malpractice liability is governed by multiple legal sources:

Law	Provision
Federal Constitution, art. 5, V and X	Right to compensation and dignity protection
Civil Code, arts. 186 and 927	Wrongful act and duty to repair
Civil Code, art. 951	Healthcare professional liability
CDC, art. 14, §4	Fault-based liability for liberal professionals
CDC, art. 14, caput	Strict liability for service providers
Medical Ethics Code	Deontological rules (CFM)

Types of Liability

Fault-Based Liability of the Doctor

The doctor, as a liberal professional, is liable for proven fault (art. 14, paragraph 4, CDC). The patient must demonstrate:

Faulty conduct (negligence, recklessness, or lack of skill)
Damage (physical, psychological, or financial)
Causal link between conduct and damage

Types of fault:

Negligence: Failure of due care or attention (e.g., not ordering necessary tests)
Recklessness: Hasty action without caution (e.g., performing surgery without adequate preparation)
Lack of skill: Absence of technical ability (e.g., procedure outside one’s specialty)

Strict Liability of Hospitals

Hospitals, clinics, and laboratories are strictly liable for damages caused by their services (art. 14, caput, CDC). No proof of fault is necessary — only the damage and causal link need to be demonstrated.

Covers:

Defects in hospital infrastructure (equipment, facilities)
Failures by nursing and auxiliary staff
Hospital-acquired infections
Errors in laboratory tests
Problems with administered medications

Obligation of Means vs. Obligation of Result

Type	Description	Examples
Obligation of means	Doctor commits to employing all adequate means	General practice, surgery, orthopedics
Obligation of result	Doctor commits to a specific outcome	Cosmetic surgery, laboratory tests

Under obligation of result, fault is presumed when the result is not achieved, reversing the burden of proof.

Malpractice vs. Adverse Outcome

Medical Malpractice (Avoidable Iatrogenesis)

Malpractice occurs when the professional acts with negligence, recklessness, or lack of skill, causing damage that could have been avoided with proper conduct.

Examples:

Misdiagnosis due to lack of testing
Prescribing contraindicated medication
Surgical instrument left in the body
Surgery on the wrong organ or side
Premature discharge with foreseeable complications
Failure in informed consent

Adverse Outcome (Unavoidable Iatrogenesis)

An adverse outcome is an undesired consequence occurring despite adequate medical conduct, arising from inherent risks of the procedure or patient conditions. Learn more about our real estate law services.

Examples:

Allergic reaction to medication with no prior history
Anesthetic complications in high-risk patients
Post-operative infection despite protocol compliance
Unsatisfactory result in complex surgery

Adverse outcomes do NOT generate civil liability, provided the doctor informed the patient of the risks and employed adequate technique.

The Free and Informed Consent Form (TCLE) is an essential document in the doctor-patient relationship. The doctor must inform the patient about:

Diagnosis and prognosis
Proposed treatment and alternatives
Risks and benefits of each option
Consequences of refusing treatment
Possible complications

The absence of adequate informed consent can itself constitute compensable moral damages, even if the treatment was technically correct (violation of patient autonomy).

Burden of Proof

General Rule

In malpractice cases, the burden of proof lies with the patient (fault-based liability). They must prove the doctor’s fault, the damage suffered, and the causal link.

Reversal of Burden of Proof

The judge may reverse the burden when:

The patient is technically or economically disadvantaged (art. 6, VIII, CDC)
The claim is plausible given the evidence
The evidence is impossible or difficult for the consumer to produce

Loss of Chance Theory

When it is impossible to prove that the malpractice directly caused the damage, but it can be shown that the patient lost the chance of a better outcome, case law admits compensation proportional to the probability of the lost success.

Expert Evidence

Expert evidence is the primary means of proof in medical liability cases. The judge appoints a medical expert (usually in the same specialty as the defendant) to evaluate:

Whether medical conduct followed accepted protocols
Whether there was negligence, recklessness, or lack of skill
Whether a causal link exists between conduct and damage
The extent of damage suffered by the patient
Whether the outcome was foreseeable and avoidable

Technical Assistants

The parties may appoint technical assistants to monitor the expert evaluation and present a divergent opinion. The court-appointed expert’s report is the most influential, but the judge is not bound by it.

Compensable Damages

Material Damages

Emergent damage: Medical expenses, medications, hospitalizations, prosthetics
Lost profits: Income lost during recovery or disability
Monthly pension: In cases of permanent disability or death
Future expenses: Treatments, corrective surgeries, rehabilitation

Moral Damages

Psychological suffering and emotional distress
Loss of quality of life
Anguish and anxiety from inadequate treatment
Grief for loss of a family member

Aesthetic Damages

Visible scars
Permanent deformities
Loss of limb or function
Alteration of physical appearance

Combination (STJ Precedent 387): It is lawful to combine compensation for aesthetic damages and moral damages.

Statute of Limitations

Basis	Period	Legal Source
Consumer relations	5 years	CDC, art. 27
General civil liability	3 years	CC, art. 206, §3, V
Against government (public hospital)	5 years	Decree 20,910/1932

Starting point: Date of knowledge of the damage, which in medical cases may be significantly after the procedure. For minors, the period begins at the age of majority.

Public Hospital Liability

State liability for malpractice in public hospitals is strict (art. 37, paragraph 6, Federal Constitution), based on administrative risk theory. The patient must prove only the damage and causal link. The State may exercise a right of recourse against the doctor who acted negligently.

When to Consult an Attorney

If you suffered harm from malpractice, consult an attorney specialized in civil litigation to:

Assess whether the situation constitutes malpractice
Gather and preserve evidence (medical records, exams, prescriptions)
Request a court-ordered medical expert evaluation
Calculate material, moral, and aesthetic damages
File a compensation lawsuit
Negotiate an extrajudicial settlement

ZS Advogados Associados has a team experienced in medical malpractice liability, offering compassionate service and effective strategies for full compensation of damages suffered. Contact us for a consultation. Learn more about our contact our team.

Conclusion

Medical malpractice liability is a complex topic requiring in-depth technical and legal analysis. Distinguishing between malpractice and adverse outcomes, properly attributing the burden of proof, and adequately quantifying damages are essential elements for a successful claim. Expert evidence is determinative, and guidance from a specialized attorney is fundamental to protecting the patient’s rights and ensuring fair compensation.

This article is for informational purposes only and does not constitute legal advice. Each case has specific circumstances that should be analyzed by a qualified attorney.