Medical error or complication: what is the difference and when is the doctor liable?

18 October 2025
Picture of Arslan Advocaten

Arslan Advocaten

Foto van Arslan Advocaten

Arslan Advocaten

Need help urgently?

Choose a location

Medical error or complication: what is the difference and when is the doctor liable?

After a medical treatment, it may happen that something goes wrong. The patient experiences harm, pain, or a poorer recovery than expected. But does that automatically mean there has been a medical error? Not always. In this blog we explain the difference between a medical error and a complication, when a doctor or hospital is liable, and how you can safeguard your rights.

What is a medical error?

A medical error (also called ‘malpractice’) means that a physician, specialist, or other healthcare provider did not act as may be expected of a reasonably competent and careful practitioner.
It involves a negligent act or omission, resulting in harm that could have been prevented with careful medical care.

Examples of medical errors:

  • An incorrect diagnosis or late recognition of a condition;

  • Wrong medication or dosage;

  • Surgical errors (such as damaging nerves or organs);

  • Insufficient aftercare or late treatment of complications;

  • Incorrect or incomplete information to the patient (lack of informed consent).

Read more about this in our blog Medical liability in the Netherlands.

What is a complication?

A complication is an undesirable but known risk of a medical procedure, which can occur without anyone making a mistake.
Complications can arise despite careful and professional practice. They are often part of the medical risks that should have been discussed with the patient beforehand.

Examples of complications:

  • An infection after surgery despite sterile conditions;

  • Secondary bleeding or scarring;

  • An allergic reaction to medication or anesthesia;

  • An unexpected side effect of a treatment that, medically speaking, could not have been prevented.

If you were properly informed about this risk beforehand and the doctor acted with due care, there is usually no liability.

Informed consent regarding complications

Complications often play a role in determining whether you were properly informed about the risks.
If the doctor did not inform you or informed you insufficiently about possible complications, then your consent may be not legally valid been.
In that case, there may still be a breach of the duty to inform, even if the complication was not medically culpable.

Read more about this in our blog Informed consent: when is consent legally valid and when is it not?

When is a doctor or hospital liable?

A doctor or hospital is liable if:

  1. The healthcare provider has made a mistake (negligent or incorrect conduct);

  2. The patient has suffered harm as a result;

  3. There is a causal link between the mistake and the harm;

  4. The mistake can be proven, for example via the medical record or an expert report.

For liability, the mere existence of damage is not enough — there must also be a culpable error.

How can you prove this?

The most important evidence in medical liability is the medical record. It must state what was discussed, how the treatment was carried out, and how complications were handled.
Therefore, always request your record. You can read how to do this, step by step, in our blog Medical record: access, copy and correction.

In addition, an independent medical advisor is engaged to assess the file. This expert compares the treatment with what is standard practice in the field.

Practical example

A patient underwent hip surgery during which a nerve was damaged. The doctor had insufficient visibility during the procedure and acted too quickly. The harm was not the result of an unavoidable complication, but of an error in execution.
The insurer acknowledged liability and the patient received compensation of over €65,000 for medical expenses, loss of earning capacity, and pain and suffering.

What can you do if you are unsure?

Are you unsure whether you are dealing with a complication or a medical error?
Take the following steps:

  1. Request your medical records;

  2. Record your symptoms and the course of treatment;

  3. Have the file assessed by an independent medical advisor;

  4. Have a personal injury lawyer assess whether a liability claim is worthwhile.

Read more about this process in How does the personal injury process work?

.

Types of compensation
When liability is acknowledged, you are entitled to compensation for both material and non-material damage.Think of medical expenses, loss of income, help in the household, and compensation for pain and suffering (smartengeld
).Read more about calculating smartengeld in our blog How can you calculate smartengeld?

.

Why Arslan Advocaten?At Arslan Advocaten
we have many years of experience with medical liability cases. We work with specialized medical advisors, assess your file free of charge, and recover all costs from the liable party.

Frequently Asked Questions

What is the main difference between a medical error and a complication?

A medical error involves negligence or a mistake by the healthcare provider, resulting in preventable harm. A complication is an undesirable but known risk of treatment that can occur despite proper care and without negligence.

When can a doctor or hospital be held liable for medical harm?

A healthcare provider is liable if they made a negligent mistake that caused harm, and there is a clear causal link between the mistake and the injury. Proof is often based on medical records and expert reports.

How does informed consent relate to complications and liability?

If a doctor fails to adequately inform you about potential complications before treatment, your consent may be invalid, and they could be liable if an unforeseen complication occurs. Proper informed consent is crucial for liability considerations.

What evidence is used to prove medical liability?

The primary evidence is the medical record, which documents the treatment, discussions, and decisions made. Expert reports may also be used to establish whether the healthcare provider acted negligently.


Related Legal Services

Share this message

Facebook
Twitter
LinkedIn

Recent Posts

Illustratie bij de doorlooptijd van een letselschadezaak

Why does a personal injury case take a long time and what can you do?

A personal injury case often takes a long time because liability, medical recovery, causal link and future damages are not yet established. You can limit delays with file planning, periodic damage overviews, targeted medical questions, timely advances and written decision deadlines. What is a long-running personal injury case? A long-running case is a file in which recovery, evidence or negotiations do not yet allow a responsible final settlement. A […]

Read more »
Illustratie bij afgewezen aansprakelijkheid en letselschade

What can you do if the insurer rejects liability?

When an insurer rejects liability, it can have major consequences for the settlement of personal injury. Always ask for a full written justification. This clarifies which factual or legal point is being disputed. Gather targeted additional evidence and monitor relevant deadlines. What does a rejection entail? A rejection means that the addressed party or insurer […]

Read more »
Illustratie bij psychisch letsel na een ongeval

Psychological injury after an accident: what about your compensation?

Post-traumatic stress disorder, anxiety, depression, and other psychological complaints can deeply impact daily life, work, and social relationships. When these complaints are the result of an accident for which another party is liable, they can be a form of personal injury. A visible physical abnormality is not required for this. What is psychological personal injury? Psychological personal injury concerns mental […]

Read more »
Illustratie bij studievertraging door letsel

What compensation do you get for study delay due to injury?

When an accident, medical incident, or crime leads to a study delay, it can have direct consequences for the future of a pupil or student. In addition to the personal impact, material damage arises because entry into the labor market is postponed. For delays of up to one year, the Study Delay Guideline 2026 offers a framework with net standard amounts. What […]

Read more »
Illustratie bij verlies van zelfwerkzaamheid na letsel

What compensation do you receive for loss of ability to perform household tasks?

When you sustain injuries in an accident, you may become limited in tasks around your home. Are you less able to do DIY, paint or garden because of your injury? Then you may be eligible for compensation for loss of self-reliance in household tasks. What is loss of self-reliance in household tasks? Self-reliance is the ability to carry out repairs yourself in the private sphere, […]

Read more »
Illustratie bij inkomensschade van een ondernemer of zzp’er

How can an entrepreneur or self-employed person claim loss of income after an injury?

An entrepreneur or self-employed person may, after an injury, miss the profit that would likely have been achieved without the accident. Loss of turnover is only an indicator: saved costs, replacement costs, seasonality, growth and residual capacity all count. A persuasive claim links medical limitations to business data and a realistic scenario without the accident. What does loss of income for business owners entail? Business-owner loss […]

Read more »

Need help urgently?

Choose a location