Tex. Occ. Code § 605.2515

A person licensed to practice orthotics or prosthetics who measures, designs, fabricates, fits, assembles, adjusts, or services an orthosis or a prosthesis under an order from a licensed physician, chiropractor, or podiatrist, or an advanced practice nurse or physician assistant acting under the delegation and supervision of a licensed physician as provided by Subchapter B, Chapter 157, and rules adopted by the Texas Medical Board, for a specific patient is exempt from licensing as a device manufacturer under Subchapter L, Chapter 431, Health and Safety Code. A person licensed to practice orthotics or prosthetics who fabricates or assembles an orthosis or a prosthesis without an order from a licensed physician, chiropractor, or podiatrist, or an advanced practice nurse or physician assistant acting under the delegation and supervision of a licensed physician as provided by Subchapter B, Chapter 157, and rules adopted by the Texas Medical Board, for a specific patient is required to be licensed as a device manufacturer under Subchapter L, Chapter 431, Health and Safety Code.