Revise definition of treating physician to include physician assistants without regard to proximity of other providers

This bill amends Montana's workers' compensation law to officially include physician assistants in the legal definition of a "treating physician," allowing them to provide care regardless of whether a physician is nearby. The change directly affects injured workers, healthcare providers, and insurance companies by expanding who can legally treat work-related injuries under the state's compensation system. By removing the proximity requirement for physician assistants, the bill ensures they can serve as primary treating providers without needing a physician to be immediately available. The legislation modifies specific sections of the Montana Code Annotated to update these definitions and takes effect immediately upon passage.