Casualty Insurance

What it is

Casualty insurance is the broad category of insurance covering legal liability for losses caused to other persons or their property. It is one of the two principal divisions of property/casualty insurance (the other being property insurance, which covers loss to the insured's own property). Casualty insurance includes general liability, professional liability, workers' compensation, commercial auto liability, and umbrella coverage.

Where medical professional liability fits

Medical professional liability (MPL) is one of several lines within casualty insurance. It is distinct from other casualty lines because of its specific underwriting variables (specialty, claims history, jurisdiction, procedure mix) and its long-tail loss pattern (claims that take years to resolve). MPL is consistently the most severity-pressured line in casualty insurance, with the highest occurrence-severity figure of any casualty line.

Why the distinction matters

When industry analysts publish casualty-insurance trend data, MPL severity often drives the conversation because it sits at one extreme of the casualty distribution. "Casualty inflation" trends across all lines tend to understate MPL trends; reports that break out MPL specifically tell a more accurate story about malpractice severity.

In settlement strategy

For counsel working across multiple lines (e.g., personal injury firms handling auto, premises, and malpractice), recognizing that MPL behaves differently from other casualty lines is essential. Reserve practices, trial culture, and jury behavior all differ substantially from general-liability work.