Nutrition is part of the professional scope of practice for PTs. However, because each state has its own jurisdictional scope of physical therapy practice, PTs should check their state practice act, which may be silent on nutrition, and state laws governing nutritional practice.
Some states do not allow any person to give nutrition advice other than a registered dietitian. Others allow any person to give nutrition advice, but only allow registered dietitian nutritionists to charge or bill insurance.
Also, each PT should consider his or her own personal scope of practice before engaging in nutrition and diet services.