Lion will be closed on Monday, February 16, 2026. Online training support is available via support@lion.com.
Search

OSHA Form 300: How to Record Pre-existing Injuries

Posted on 6/5/2012 by James Griffin

Q. If I have an employee who has a pre-existing injury from something non-work-related, but she becomes reinjured while doing her job, do I have to record the injury?
 
A. The Occupational Safety and Health Administration (OSHA) requires employers to record each fatality, injury, and illness that is:
 
  1. A new case, and
  2. Work-related, and
  3. Meets one or more of the general recording criteria at 29 CFR 1904.7
[29 CFR 1904.4]
 
Defining Different Types of “Work-Related” Injuries
 
Today, we’ll focus on the second trigger: the injury must be “work-related.” In most cases, this is fairly straightforward, but it may become confusing when an injury that occurs at work is a result of a pre-existing condition that occurred outside of work.
 
Let’s do an example. Let’s say that John injures his shoulder playing softball with his friends on Saturday. He comes into work on Monday and begins his work shift and is initially able to do his job. After he’s been working for a couple hours, however, he wrenches his shoulder lifting some heavy boxes and has to take off work for the next week to recover. Would John’s injury be considered work-related if his shoulder was known to be previously injured from a non-work-related incident?
 
In this case, yes, it would need to be recorded. If a pre-existing injury or illness is “significantly aggravated” by an exposure in the work environment, then that aggravation makes the recurrence of the injury or illness a new case of a work-related injury/illness.
 
Pre-Existing Conditions Can Be “Significantly Aggravated”
 
A pre-existing injury has been “significantly aggravated” when an event or exposure leads to one of the following:

  • One or more days away from work, days of restricted work, or days of job transfer,
  • Medical treatment or a change in medical treatment,
  • Loss of consciousness, or
  • Death.
[29 CFR 1904.5(b)(3)-(4)]
 
In John’s case, his pre-existing shoulder injury alone wouldn’t have required him to take time off work. However, when he lifted the boxes for his job, that activity aggravated his injury to the point where he had to take time off from work, making his injury work-related and creating an incident that must be recorded on the OSHA 300 log.
 
Avoid Recordable Injuries with Better Communication
 
Let’s do another example, this time of an incident that will not be recorded. On Sunday, Jane hurts her knee skiing. Before work begins on Monday, she informs her supervisor of the injury and is reassigned to do paperwork instead of physical activity for a few days.
 
A day of restricted work or job transfer as the result of an injury is usually recordable. However, as this reassignment occurred before any occupational exposures could aggravate Jane’s condition, her injury is solely the result of outside factors and, therefore, her case is not work-related and does not need to be recorded on the OSHA 300 log.
 
What difficulties have you found in determining a work-related injuries? Do you have any advice or tips for filling out the OSHA 300 log?
 

Tags: osha, reporting and recordkeeping

Find a Post

Compliance Archives

Lion - Quotes

My experience with Lion training, both online and in the classroom, is that they are far better organized and provide a better sequential explanation of the material.

Robert Roose

Manager, Dangerous Goods Transportation

The instructor created a great learning environment.

Avinash Thummadi

CAD & Environmental Manager

I tried other environmental training providers, but they were all sub-standard compared to Lion. I will not stray from Lion again!

Sara Sills

Environmental Specialist

Lion's training was by far the best online RCRA training I've ever taken. It was challenging and the layout was great!

Paul Harbison

Hazardous Waste Professional

I used the IT support number available and my issue was resolved within a few minutes. I don't see anything that could have made it better.

Danny Province

EHS Professional

The instructor clearly enjoys his job and transmits that enthusiasm. He made a dry subject very interesting and fun.

Teresa Arellanes

EHS Manager

Lion was very extensive. There was a lot of things that were covered that were actually pertaining to what I do and work with. Great Job. I will be coming back in three years!

Tony Petrik

Hazmat Shipping Professional

Lion is at the top of the industry in compliance training. Course content and structure are updated frequently to make annual re-training enjoyable. I like that Lion has experts that I can contact for 1 year after the training.

Caroline Froning

Plant Chemist

Well designed and thorough program. Excellent summary of requirements with references. Inclusion of regulations in hard copy form, as well as full electronic with state pertinent regulations included is a great bonus!

Oscar Fisher

EHS Manager

Best instructor ever! I was going to take my DOT training w/a different provider, but based on this presentation, I will also be doing my DOT training w/Lion!

Donna Moot

Hazardous Waste Professional

Download Our Latest Whitepaper

In most cases, injuries that occur at work are work-related and must be recorded to maintain compliance with OSHA regulations. This report shows you the 9 types of injuries you don’t record.

Latest Whitepaper

By submitting your phone number, you agree to receive recurring marketing and training text messages. Consent to receive text messages is not required for any purchases. Text STOP at any time to cancel. Message and data rates may apply. View our Terms & Conditions and Privacy Policy.