Workers' compensation information system (WCIS)
Workers’ Compensation Claims by Injury Type
Trading Partners submit First Reports of Injury (FROIs) to the Workers’ Compensation Information System (WCIS). These first reports contain information on the type of injury or illness a worker sustains, categorized by Part of Body, Cause of Injury, and Nature of Injury. These categorized values codes are collected and organized using the Workers’ Compensation Insurance Organizations’ (WCIO) Injury Description Tables which can be found at Workers Compensation Insurance Organizations.
While these codes contain descriptions of injuries and illnesses that are recognizable, they do not represent a diagnosis from a medical care provider. WCIS collects medical diagnosis information via the Medical Billing Database. To get a complete picture of workplace injuries requires a combination of these codes, the FROI injury description, and medical diagnosis information. The number of FROI records with a given occupational disease or injury should not be quoted without further study.
The numbers below reflect the WCIS database information as of the run date of the report.
| Detailed Parts of Body | Count of 2024
FROIs |
Percent of Total 2024
FROIs |
|---|---|---|
| Multiple Body Parts (incl. Body Systems and Body Parts) | 69,104 | 10% |
| Low Back Area (Lumbar and Lumbo-Sacral) | 66,099 | 10% |
| Finger(s) | 51,670 | 8% |
| Knee | 45,982 | 7% |
| Hand (excl. Wrist and Fingers) | 40,944 | 6% |
| Shoulder(s) | 38,072 | 6% |
| Ankle | 26,725 | 4% |
| Wrist | 23,643 | 3% |
| Soft Tissue | 23,345 | 3% |
| Eye(s) | 22,339 | 3% |
| Detailed Causes of Injury | Count of 2024 FROIs | Percent of Total 2024 FROIs |
|---|---|---|
| Lifting | 51,941 | 8% |
| Strain or Injury by, NOC | 50,612 | 7% |
| Cumulative, NOC | 49,563 | 7% |
| Other Miscellaneous, NOC | 46,226 | 7% |
| Fall, Slip, Trip, NOC | 36,899 | 5% |
| Object Being Lifted or Handled | 33,212 | 5% |
| Repetitive Motion | 30,976 | 5% |
| On Same Level | 29,366 | 4% |
| Cut, Puncture, Scrape | 23,287 | 3% |
| Fellow Worker, Patient or Other Person | 22,618 | 3% |
| Detailed Natures of Injury | Count of 2024 FROIs | Percent of Total 2024 FROIs |
|---|---|---|
| Strain or Tear | 184,461 | 27% |
| Contusion | 98,253 | 14% |
| All Other Specific Injuries, NOC | 61,985 | 9% |
| Laceration | 56,567 | 8% |
| Sprain or Tear | 53,020 | 8% |
| All Other Cumulative Injuries | 38,212 | 6% |
| Puncture | 28,545 | 4% |
| Multiple Physical Injuries Only | 22,249 | 3% |
| Inflammation | 14,913 | 2% |
| Mental Stress | 14,010 | 2% |
| Report Year | Report Group | Table Number | Table Name |
|---|---|---|---|
| 2024 | Annual Aggregate Type of Injury Reports | 1 | Workers' compensation claims by part of body |
| 2024 | Annual Aggregate Type of Injury Reports | 1a | Workers' compensation claims by part of body – detailed |
| 2024 | Annual Aggregate Type of Injury Reports | 2 | Workers' compensation claims by cause of injury |
| 2024 | Annual Aggregate Type of Injury Reports | 2a | Workers' compensation claims by cause of injury – detailed |
| 2024 | Annual Aggregate Type of Injury Reports | 3 | Workers' compensation claims by nature of injury* |
| 2024 | Annual Aggregate Type of Injury Reports | 3a | Workers' compensation claims by nature of injury* - detailed |
November 2025