The main purpose of this legislation is to update and clarify the payment rules for manual wheelchairs under Medicare, specifically focusing on ultralightweight manual wheelchairs. The goal is to ensure that individuals who need these types of wheelchairs have better access to them and understand the costs involved. Key provisions of the legislation include the requirement for the Secretary of Health and Human Services to create specific codes for different types of ultralightweight manual wheelchairs based on the materials used in their construction, such as titanium or carbon fiber.