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How Do Pre-Existing Conditions Affect Workers’ Compensation Claims?

Office worker sitting at a desk, stretching and holding his lower back, indicating discomfort or a possible pre-existing injury.

Workers’ compensation provides critical support for employees who suffer injuries or illnesses due to their jobs. However, navigating a workers’ compensation claim in California can become more complex when a pre-existing condition is aggravated or worsens while on the job. Understanding how pre-existing conditions are handled under California law is essential for those seeking the benefits they deserve after a workplace injury.

How does California define a new injury with a pre-existing condition?

A pre-existing condition refers to any health issue or injury that existed before the workplace accident or illness occurred. Common examples include chronic conditions such as arthritis, prior back injuries, or degenerative disc disease. Even past surgeries or conditions that have fully healed can qualify as pre-existing under workers’ compensation law if they are aggravated or exacerbated by work-related activities.

It is important to note that having a pre-existing condition does not disqualify a worker from receiving compensation. California law acknowledges that workplace injuries can worsen existing health issues, and benefits may still be available to address the new injury or aggravation.

Under California law, any injury that arises out of and in the course of employment qualifies for workers’ compensation, even if it interacts with a pre-existing condition. The critical factor is whether the workplace activity contributed to the injury or made the existing condition worse.

For example, an employee with a history of back problems who experiences increased pain after lifting heavy equipment at work may qualify for compensation if medical evidence shows that work activities aggravated the condition. California’s "no-fault" workers’ compensation system allows claims even when an employee’s own health history plays a role, as long as the workplace is a contributing factor.

Common workers’ comp claims involving pre-existing conditions

Pre-existing conditions often surface in specific types of workers’ compensation claims, particularly those involving repetitive strain or physically demanding tasks. These claims may include:

  • Back and Neck Injuries: Jobs requiring heavy lifting or repetitive bending often worsen existing spinal or muscular issues.
  • Joint Problems: Tasks involving prolonged standing, walking, or awkward postures can aggravate pre-existing arthritis or knee injuries.
  • Carpal Tunnel Syndrome: Workers with previous wrist injuries may find repetitive typing, assembly line tasks, or tool usage worsening their symptoms.
  • Respiratory Conditions: Exposure to hazardous substances at work can exacerbate asthma or other lung diseases.

These cases can involve unique challenges, as employers or insurance companies may attempt to attribute symptoms entirely to the pre-existing condition rather than work-related activities. This is why it is essential to present clear medical evidence linking workplace activities to the aggravation of the condition.

Challenges with pre-existing conditions

Successfully navigating a workers’ compensation claim that involves a pre-existing condition requires addressing several hurdles. Insurance companies frequently scrutinize these claims, often questioning the extent to which the workplace contributed to the injury. Common challenges include:

  • Proving Causation: Demonstrating that workplace activities worsened a pre-existing condition can require detailed medical evaluations and expert opinions.
  • Apportionment of Benefits: California law allows insurance companies to divide responsibility for benefits between workplace injuries and pre-existing conditions, which can reduce the amount of compensation received.
  • Denial of Claims: Some insurers may deny claims outright, arguing that the injury stems solely from the pre-existing condition rather than the workplace.

Workers facing these challenges should ensure that all medical evidence and documentation are accurate and complete. Consulting with a legal professional can often help clarify complex legal issues and build a compelling case for compensation.

When to call a workers' compensation lawyer

Workers’ compensation claims involving pre-existing conditions are rarely straightforward. Employers and insurance companies may attempt to minimize or deny claims by focusing on the pre-existing issue rather than the workplace injury. For injured workers, navigating the legal complexities, gathering medical evidence, and ensuring fair compensation can feel overwhelming. Consulting with an experienced workers’ compensation lawyer can make a significant difference. Legal professionals can:

  • Guide injured workers through the claims process.
  • Secure independent medical evaluations.
  • Challenge improper apportionment or denial of benefits.

No one should face these challenges alone, especially when health and financial well-being are at stake. California workers’ compensation law is designed to protect employees, even those with pre-existing conditions, but navigating these claims often requires experienced guidance. A knowledgeable workers’ compensation lawyer can ensure injured workers have the support needed to secure the benefits they deserve.

Workers with pre-existing conditions should not delay seeking legal advice. Taking swift action can protect rights, maximize compensation, and bring peace of mind during a challenging time.

Injured on the job? Contact Robert A. McLaughlin, APC

A workplace injury can leave you facing lost income and mounting medical bills. Robert A. McLaughlin, APC, fights to help injured workers in San Diego and throughout Southern California get the workers’ compensation benefits they deserve.

Contact Robert A. McLaughlin, APC, today for a free consultation and put a trusted workers’ compensation lawyer to work for you.

"I could not have asked for better representation, especially during a pandemic. The Law Offices of McLaughlin and Sanchez have been outstanding. All that is needed is open communication (as with any law firm) and honesty. The office asks so little of you that it was easy to provide the requested documents to Alicia Cordova and to make sure that I attended phone conferences. The issue was settled, and I will not hesitate to recommend this law firm. I've never been a fan of attorneys, but my experience is helping to change my attitude towards attorneys. If you are in the San Diego or South Bay area of San Diego, do not hesitate to contact this law firm." - D.J., ⭐⭐⭐⭐⭐

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