This, of course, depends on the funding source. However, with proper justification, dynamic seating is often approved. Look for sample justification wording for funding documentation on this website in the near future.
Medicare is a nationwide payer and funding dynamic components can be difficult. Please contact your local supplier or ATP for up to date funding requirements and assistance.
Medicaid varies from state to state and pays for dynamic components in many cases. A prior approval is often required before the product is ordered.
Insurance companies vary by company and specific plan. Dynamic seating is a rehabilitation product which many insurance carriers are not familiar with. Therefore you should contact a supplier who is familiar with your insurance requirements and can provide necessary documentation.