Documenting the medical necessity of wheelchairs, seating systems, and other forms of durable medical equipment is often seen as a daunting task by therapists and equipment providers alike. Although often intimidating, through the use of a thorough evaluation and seating assessment, the obtainment of a complete medical history, and foundational knowledge of the equipment to be obtained, as well as the correlating justification requirements, even the inexperienced clinician can create a bulletproof letter of medical necessity (LMN).