There are no state laws requiring employers to have a clinic at the worksite or to keep a doctor or nurse on call to treat workplace injuries. However, the federal Occupational Safety and Health Act (OSH Act), which governs Massachusetts workplace safety and health in private sector (private businesses and nonprofit organizations) workplaces, requires every employer to ensure that medical personnel are readily available for advice and consultation and that when an infirmary, clinic, or hospital is not within close proximity to the workplace, there is at least one individual who is adequately trained to administer first aid. Employers are responsible for making decisions about the details of emergency medical care in their workplaces, depending upon the size of the workplace, the kinds of hazards present, the history of accidents, and the costs of various options (29 CFR 1910.151).
Massachusetts does not have any law specific to medical treatment in public sector (government offices and operations) workplaces. There is additional information and a description of the basic elements of an effective medical treatment program.