Applying for wheelchair funding in the United States involves a structured process centered on demonstrating medical necessity and verifying financial or service-related eligibility. The process generally follows these steps:

1. Clinical Evaluation: Schedule a face-to-face medical examination with a physician to confirm the need for a custom motorized wheelchair and obtain a written prescription (WOPD).
2. Professional Assessment: Work with a certified Assistive Technology Professional (ATP) for a functional evaluation of your home environment and physical needs.
3. Documentation: Gather required paperwork, including personal identification, proof of residency, and financial or income statements for programs like Medicaid.
4. Application Submission: Submit applications through various channels such as Medicare Part B for senior or disabled coverage, state Medicaid portals, or VA medical centers for veterans with service-connected disabilities.
5. Tracking and Coordination: Monitor the application status, which typically takes between 30 to 90 days for approval.

For low-income individuals or those with specific gaps in coverage, you can stack multiple funding sources, such as combining federal grants (like Section 5310), nonprofit grants from organizations like the Free Wheelchair Mission or Easterseals, and state-specific subsidies.