Workers compensation covers illnesses caused by workplace exposure, not just acute injuries. Occupational illness claims follow different rules than injury claims — they often involve long latency periods, complex causation proof, and specialized medical evidence. Understanding which illnesses are compensable and what proof is required helps workers recognize when a chronic condition may have a workers comp remedy.

Respiratory illnesses

Asbestosis (from asbestos exposure, often decades after initial exposure), silicosis (silica dust from mining, stone cutting, sandblasting), occupational asthma (from chemical sensitization), coal workers' pneumoconiosis (black lung disease in coal miners), and hypersensitivity pneumonitis (farmers' lung, bird breeder's lung). These claims often involve latency periods of 10-40 years between exposure and symptom onset, which complicates the statute of limitations and employer identification. Most states have specific provisions extending the filing deadline for latent occupational illnesses.

Noise-induced hearing loss

Occupational noise exposure at levels above 85 dB causes progressive sensorineural hearing loss. OSHA's hearing conservation standard (29 CFR 1910.95) requires hearing tests, hearing protection, and noise monitoring in workplaces with high exposure. Hearing loss claims are compensable in every state when tied to documented occupational noise exposure. Baseline audiograms (done at hire) versus current audiograms establish the work-related shift. Impairment ratings use the AMA Guides' pure-tone average methodology.

Chemical exposure and occupational cancer

Benzene (leukemia), asbestos (mesothelioma and lung cancer), vinyl chloride (liver cancer), arsenic (multiple cancer types), and radiation exposure (various cancers) are the most-established occupational carcinogens. Claims for cancer caused by workplace chemical exposure are compensable when medical evidence links the specific exposure to the specific cancer type. These claims often involve expert witness testimony from occupational medicine specialists and industrial hygienists.

Cumulative trauma and repetitive stress

Carpal tunnel syndrome (repetitive wrist motion), trigger finger, lateral epicondylitis (tennis elbow), medial epicondylitis (golfer's elbow), rotator cuff tendinitis, and chronic low back pain are all compensable as cumulative trauma when medical evidence supports work causation. Proof requires documenting the specific work activities, their duration and intensity, and the medical opinion linking them to the condition. These claims are harder to prove than acute injuries because the mechanism is gradual and multifactorial.

Mental health injuries

Compensability varies by state. Approximately two-thirds of states recognize mental-mental claims (psychological injury caused by psychological stimulus at work, like PTSD from witnessing a traumatic event). The proof standard is typically heightened — ‘unusual workplace stress,’ ‘extraordinary pressures,’ or similar formulations. Mental-physical claims (psychological injury leading to physical manifestation like heart attack) and physical-mental claims (physical injury leading to psychological sequelae) are more widely accepted.

Related reading

For acute injury claims, see common workplace injuries. For chronic pain specifically, see workers comp for chronic pain. For the broader framework, the Complete Guide covers the claim process for all compensable conditions.