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How to obtain an L4 online?

Martyna Nowacka
Author: Martyna Nowacka
Created: 4 lipiec 2026 4 lipiec 2026

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How to obtain L4 online is a question that more and more people needing temporary incapacity for work are asking without the need to visit a doctor’s office. L4 online, implemented as an e-sick leave in the e-ZLA system, can be issued after a teleconsultation if the doctor, based on the medical interview, finds justified clinical indications for it.

  • Online sick leave has full legal force and works the same as traditional sick leave.
  • The decision always depends on the doctor’s assessment, not on the form of the visit itself.
  • The system automatically transmits data to public institutions.
  • Studies confirm the safety of assessing incapacity for work remotely.

See also: Can you obtain L4 online without examinations?

What is L4 online and how does e-sick leave work?

L4 online is the common name for electronic sick leave functioning in the e-ZLA system. This document has the same legal status as a sick leave issued during an in-person visit and serves as an official confirmation of temporary incapacity for work.

After issuing, the e-sick leave goes directly to the IT systems of public institutions, including ZUS. Studies published in the “Journal of Medical Internet Research” show that the electronic circulation of sick leaves reduces the number of formal errors and speeds up the processing of sickness benefits.

From the patient’s perspective, this means no need to deliver documents to the employer and greater transparency of the entire procedure.

What role does telemedicine and teleconsultation play?

E-sick leave can be issued as part of telemedicine, most often during a teleconsultation. A key element of such a consultation is a detailed medical interview that allows the doctor to assess whether the patient’s health condition indeed causes incapacity for work.

Analyses published in “BMJ Open” indicate that decisions made based on a reliable interview are comparable to those made during in-person visits. Therefore, a teleconsultation is not a “shortcut” form of a visit, but a full-fledged medical service.

The doctor is obliged to refuse to issue a sick leave if there are no medical grounds, regardless of the patient’s expectations.

E-referral to a sanatorium. What does the online process look like?

What does the process of obtaining L4 online look like step by step?

The process of obtaining sick leave online begins with registering for a consultation, most often via a medical platform. The patient describes the symptoms and their impact on the ability to work.

Next, an online consultation takes place, during which the doctor analyzes the reported ailments, their course, and previous treatment. Studies in occupational medicine emphasize that functional assessment is crucial, not just the name of the disease.

If the criteria are met, the doctor issues an e-ZLA, which immediately becomes valid and visible in the information systems.

Who can receive L4 online and in what situations?

Online sick leave can be obtained by a person covered by sickness insurance if the doctor determines temporary incapacity for work. Population studies show that teleconsultations work particularly well in cases of diseases with typical and predictable courses.

The most common situations in which L4 online is considered:

  • Viral infection with general symptoms.
  • Flu or flu-like conditions.
  • Food poisoning.
  • Mechanical injury not requiring urgent intervention.

In cases requiring a physical examination, the doctor is obliged to refer the patient for an in-person visit.

How does e-sick leave reach the employer and ZUS?

After issuing the document, the e-ZLA system automatically transmits the information to ZUS and then to the employer. The employer does not receive information about the reason for the sick leave, only about the period of incapacity for work.

European studies on the digitization of healthcare show that such a solution increases the protection of personal data and reduces the risk of abuse. The patient can check the details of the sick leave in the information systems without the need to contact the institutions.

For those using public benefits, integration with financing systems, such as NFZ, is also important.

Online prescription, or immediate access to the most necessary medications. How does online prescription work?

Q&A – frequently asked questions about L4 online

Is L4 online as valid as traditional sick leave?
Yes, e-ZLA has full legal force and is recognized by the employer.

Does every teleconsultation end with a sick leave?
No, the decision depends solely on the medical assessment of the doctor.

Does the employer see that the sick leave was issued online?
No, the form of consultation is not communicated to the employer.

Sources

  • Journal of Medical Internet Research – studies on telemedicine and e-sick leaves.
  • BMJ Open – analyses of decisions made remotely.
  • World Health Organization – reports on the digitization of healthcare.
  • Publications from the European Union on e-ZLA and e-health systems.
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