Occupational Disease (Türkiye): Definition, Identification, Compensation and Litigation Strategy

1) Conceptual Framework: What is an Occupational Disease?

Occupational disease refers to illnesses and physical/mental impairments caused by recurring/gradual factors arising from the nature of the work performed or the working conditions of the insured person . While work accidents often occur as a result of a sudden and external event, occupational diseases develop as a result of chronic exposure . This distinction is critically important, especially in discussions of causality and statute of limitations.

The elements of an occupational disease can be summarized as follows:

• Exposure: The prolonged exposure to physical, chemical, biological, ergonomic, or psychosocial risk factors arising from the nature of work or workplace conditions.

• Harm/Illness: A medically diagnosed illness, loss of function, or mental/psychosocial disorder.

• Causality : A medically convincing link between exposure and disease

• Temporal process : The disease often manifests over a long period ; there is a clinical course consistent with the nature of the work

2) The Backbone of the Legislation and General Principles

• The Social Security and General Health Insurance Law No. 5510 defines occupational diseases from a social insurance perspective; it regulates notification obligations, temporary/permanent disability benefits, the Social Security Institution's Health Board processes, and the Institution's recourse rights.

• The Occupational Health and Safety Law No. 6331 details the employer's obligations to prevent foreseeable risks, provide training, supervise, measure and monitor, and conduct health surveillance ; it also prescribes administrative sanctions for violations

• The Labor Law No. 4857 includes regulations supporting the obligations within the framework of the employment relationship and the principle of worker protection.

• According to Article 417 of the Turkish Code of Obligations No. 6098, the employer's duty of care towards the employee is the substantive legal basis for liability in occupational disease cases.

• Secondary legislation (regulations, lists, health board procedures) defines the classification of occupational diseases, evaluation criteria, and reporting procedures.

Basic principle : The employer is obligated to keep occupational health and safety measures up-to-date in line with scientific and technical developments . Risk assessment, training, provision and monitoring of personal protective equipment (PPE) use, environmental measurements, periodic health examinations, appropriate organization and supervision are the main aspects of the employer's duty of care

3) Classification of Occupational Diseases and Typical Examples

Occupational diseases are encountered in practice in the following groups:

1. Physical factors: Noise (hearing loss), vibration (arm-arm tremor syndrome), high/low temperature, radiation, pressure changes (diver's illnesses), musculoskeletal problems due to lighting/ergonomics.

2. Chemical agents: Solvents, heavy metals (lead, cadmium), pesticides, acids, alkalis, dusts (silicosis, etc.).

3. Biological agents: Exposure to bacteria, viruses, fungi, and parasites (bloodborne transmission in healthcare workers).

4. Ergonomic stressors: Repetitive movements, improper posture, excessive lifting, pushing, and pulling; lower back, neck, and shoulder syndromes.

5. Psychosocial risks: Work organization, intense work pressure, mobbing; mental health disorders ranging from burnout and anxiety to major depressive episodes (comprehensive psychiatric/workplace analyses are required for causal assessment).

Although these groups are consistent with the Occupational Diseases List , the list should not be interpreted as a closed catalog . In practice , conditions not included in the list can also be accepted as occupational diseases with scientific evidence and strong causality

4) Notification and Initial Medical Procedures

Notification obligations are addressed under two headings:

• Employer's notification: In case of suspected occupational disease, within the legal time limit . (The "moment of learning" is critical in calculating the time limit, and in practice, all evidence must be documented in writing.)

• Notification by healthcare providers: Occupational physicians and healthcare facilities must also report suspected occupational diseases to the Institution.

Clinical evaluation typically proceeds through the following steps:

1. Detailed occupational history (job description, duties and rotations, length of employment, previous workplaces, chemicals/tools used, use of PPE).

2. environmental measurements and workplace risk assessment records.

3. Periodic medical examination data, pre-employment reports, training attendance forms.

4. Diagnostic tests (audiometry, spirometry, blood/urine biomarkers, imaging, etc.).

5. Authorized medical board report (referral if suspicion of occupational disease is strengthened).

5) Occupational Disease Determination by the Social Security Institution (SGK)

The assessment process the Institution's Health Board and relevant higher-level board mechanisms. Key topics include:

• The rate of loss of earning capacity of a worker in their profession is determined according to scientific criteria.

• The agency requests workplace records and environmental measurements ; and conducts workplace inspections if necessary

• Appeal : It is possible to appeal to higher authorities against the initial finding/decision. When the dispute is brought to court, the courts utilize expert opinions and forensic medical reports

According to the findings:

• Temporary disability benefit,

• Permanent disability income (partial/full),

• In the event of death, the issue of income support may arise for dependent beneficiaries . These rights are independent of any compensation lawsuit filed against the employer , and the court may discuss joint and several liability and partial offsetting
  

6) Employer's Responsibility and Fault Assessment

The employer must eliminate foreseeable risks , or minimize them if elimination is not possible . This task is interpreted dynamically in light of technological capabilities and scientific advancements .

Defect criteria:

• The existence, currency, and suitability of the risk assessment to the specific job

• Environmental measurements and exposure limits (e.g., noise dB, dust PEL, chemical TLV).

• Procurement and monitoring of PPE usage (distribution alone is not enough; training and usage supervision are essential).

• The existence and implementation of training, instructions , and written procedures

• Work organization: Rotation, breaks, ergonomics of workstations.

• Health surveillance: Periodic examinations, early warning systems.

• Record keeping and monitoring: Occupational Health and Safety Board decisions, workplace physician/expert reports.

a subcontractor-main contractor relationship , employers are often jointly and severally liable . It is an established principle of practice that subcontracting does not transfer occupational health and safety responsibilities .

7) Causation: Scientific Evidence and “Higher Probability”

Courts medical causalityusing the "high probability" standard. The following factors strengthen the causal link:

• Statistically higher incidence in the same or similar jobs ,

• between the duration and intensity of exposure and the clinical picture,

• exclusionary factors (smoking, hobbies, comorbidities),

• Early detection of symptoms during pre-employment/periodic medical examinations

Reasons that interrupt the causal link (force majeure, gross negligence of the injured party or a third party ) may reduce the employer's liability; however, the burden of proof that the employer has established proper occupational health and safety management remains on the employer

8) Evidence and Expert Testimony: How to Compile the Case?

Strategic evidence set:

• Workplace files: Risk assessment, OHS Committee decisions, training attendance lists, instructions, PPE assignment and inspection forms.

• Environmental measurements: Noise, dust, vibration, chemical measurements; reported by accredited organizations.

• Medical records: Pre-employment/periodic examinations, referral documents, e-prescriptions/e-reports, imaging results, occupational history.

• Witness statements: Accounts of exposure from workers in the same department.

• Correspondence and internal audit records: Emails, specific instructions, and minutes.

• Photos/videos: Workstations, use of PPE, machine/equipment layout.

Expert Witness : Occupational disease cases often require multidisciplinary expert opinions , including occupational health specialists, physicians from fields such as pulmonary diseases/audiology/ergonomics, and occupational safety specialists . Forensic medicine/university board reports can be decisive in court.

9) Compensation Items (Material – Non-Material)

monetary compensation :

• Loss of earnings (temporary and permanent disability),

• Caregiver expenses (if medically necessary),

• Treatment and rehabilitation expenses,

• Prosthetic/orthopedic device expenses,

• Essential expenses such as transportation, escort, special diet/accommodation

Moral compensation: This is assessed based on the principle of balanced compensation for severe and lasting effects; loss of quality of life; and pain, suffering, and distress. In case of death, compensation for loss of support (material) and moral compensation come into play.

Courts prevent double compensation when equalizing income/payments made by the Social Security Institution; the principle of " compensation reduction/offset " is determined through a mathematical analysis of the specific case.

10) Mediation, Jurisdiction and Types of Cases

• Mandatory mediation : It is often mandatory in labor-employer disputes ; in compensation claims based on occupational diseases, practice also considers mediation a prerequisite for litigation. The application should concisely but clearly state the event, causality, claims, and evidence ; technical data/measurements should be attached.

• The competent courtis the Labor Court. For cases involving Social Security Institution (SGK) procedures, special rules of social security law apply.

• Jurisdiction: The court of the defendant's place of residence or the place where the work was performed; broad interpretations of jurisdiction in favor of the employee are accepted in practice.

Litigation strategy:

1. Determination: "Occupational disease" (and/or cancellation of the Institution's decision).

2. Eda: Material and moral compensation; damages related to permanent/temporary disability.

3. Combining: Depending on the specific circumstances, requests for determination and performance can be filed together or separately.

4. Precautionary measure: Especially in cases requiring critical treatment/medication/prosthetics.

5. Gathering evidence : Expanding all records and obtaining information and documents in the early stages .

11) Statute of Limitations

In occupational disease compensation claims, Article 72 of the Turkish Code of Obligations :

• Two years from the start of learning,

• In any case, 10 years.

• If the act also constitutes a crime, and the statute of limitations for punishment is longer, then that longer period applies.

In occupational diseases, the learning of the condition often the diagnosis is made or at least strong suspicion arises. Therefore, the dates of medical reports and the times the worker notifies the employer/Social Security Institution are decisive in calculating the time period.

12) Public Employer and Legal Remedies

The employer's occupational health and safety (OHS) obligations also apply in public workplaces. The distinction and clear path between an employee's claims for full judicial review based on negligence against the administration (administrative courts) and compensation lawsuits filed in the civil courts against the public legal entity acting as the employer must be carefully planned. In practice, different liability theories (fault, strict liability, strict liability) and separate jurisdictional scenarios may be observed; the case strategy should be structured accordingly.

13) Recourse Lawsuits of the Social Security Institution

The Social Security Institution (SGK) may seek recourse from the employer for the income it has linked and the payments it has made . This recourse may be based on:

• The employer's fault,

• occupational health and safety measures,

• The assessment of causality is the primary criterion. A recourse action creates an additional financial risk for the employer ; therefore, the threat of recourse should be considered when planning settlement scenarios in the employer's representation.
  

14) Common Mistakes in Practice and Risk Reduction

• Distributing PPE alone does not provide protection without supervision and training ; documented usage monitoring is necessary.

• Risk assessments shouldn't remain on the shelf: they should be a "living document"; they must be updated immediately.

• Delaying environmental measurements : Periodic monitoring is essential , especially for dust, noise, and chemical exposures .

• Skipping periodic check-ups: Misses the opportunity for early diagnosis; increases the risk of compensation claims and recourse.

• Insufficient exposure recordsweaken the proof of causality.

• Going to mediation unprepared: Abstract demands without technical supporting documents diminish negotiating power.

15) Strategic Recommendations from the Perspective of Employees and Employers

For the worker/representative:

• Create an occupational history and exposure map at an early stage .

• Obtain workplace documents ; request measurement and training records.

• Request an expert opinion from a panel covering specialized fields

• Substantiate the grounds for moral damages based on the clinical condition and quality of life

• Don't delay taking the necessary steps to prevent the statute of limitations from expiring .

For the employer/representative:

• Make your occupational health and safety (OHS) system verifiable (culture of auditing/record keeping)

• Prioritize risk-reducing engineering controls (don't rely solely on PPE)

• Be proactive if you suspect an occupational disease ; seek early referral, temporary assignment/rotation.

• In mediation, keep reasonable compromise options on the table , supported by technical data

• Manage a compliance program to address potential recourse and collective risks .

16) Example Event Flow (Short Scenario)

• A, who worked in a metalworking workshop for 10 years, applied with a complaint of progressively increasing hearing loss

• The audiogram at employment is normal , near the limit at year 5, and shows significant loss at year 10. Noise measurements yield results above the limit over the years ; PPE has been distributed, but usage monitoring is inadequate.

• The authorized health board diagnoses the occupational disease ; the rate of partial disability is determined.

• The worker requests compensation for material and moral damages from the employer after mandatory mediation . Social Security Institution (SGK) procedures are carried out; the court expert evaluates both exposure records and audiological data ; fault assessment and offsetting calculations are made.