Your child's doctor just said they need a wheelchair seating evaluation, and you have no idea what that means. You know your child needs better support in their current chair, or maybe this is the first time you're getting a wheelchair at all. Either way, the appointment is in two weeks and you don't know what to expect.

A wheelchair seating evaluation isn't a standard office visit. It's a specialized assessment involving a team of professionals who measure, test, and analyze how your child's body interacts with positioning equipment. Here's what happens in the room, who you'll meet, and what you need to bring to make the appointment productive.

Who's on the Seating Team

A seating clinic isn't a solo appointment. You'll typically meet with three core team members, and sometimes more depending on the clinic and your child's needs.

The Assistive Technology Professional (ATP) is often the lead. ATPs are certified specialists in wheelchair and seating systems. They know device brands, features, insurance documentation requirements, and how to match equipment to function. They're the ones who will translate clinical needs into a specific chair model and configuration.

A physical therapist evaluates your child's posture, range of motion, muscle tone, and positioning needs. They assess how your child sits, where they need support, and what positioning strategies will help them function best throughout the day. Some clinics use an occupational therapist instead, or both.

If your child sees a physiatrist (a doctor specializing in physical medicine and rehabilitation), they may attend to provide medical oversight, prescribe the equipment, and document medical necessity for insurance. Not every clinic includes a physiatrist at the evaluation itself, but one signs off on the prescription.

Depending on the clinic, you might also meet with a vendor representative who brings equipment to trial, or a seating specialist from a children's hospital rehab department.

What Measurements Get Taken

The team measures your child's body in the wheelchair position, not standing. These measurements determine seat width, seat depth, back height, footrest position, and armrest height.

Posture assessment comes first. The therapist watches how your child sits when unsupported, where they lean, whether their pelvis tilts, and how their spine curves. They're looking for asymmetries, habitual positions, and areas where external support could improve alignment.

Body measurements are specific. The team measures hip width (for seat width), thigh length from hip to knee (for seat depth), trunk height from seat to shoulder (for back height), and lower leg length (for footrest positioning). Growth adjustability matters here, especially for younger children who will outgrow equipment every two to three years.

If your child has limited mobility or can't reposition themselves independently, the team often uses pressure mapping. A thin mat with sensors goes under your child while they sit. It creates a visual map showing exactly where pressure concentrates. Red zones indicate high-pressure areas where skin is at risk for breakdown. This data guides cushion selection and positioning adjustments to distribute weight more evenly.

For many parents, pressure mapping is the first time they see visual proof of what their child experiences but can't always articulate. The map shows why custom seating isn't optional for kids who sit for hours without shifting their weight.

What Your Child Experiences

Most of the evaluation involves sitting. Your child will sit in their current wheelchair if they have one, then try positioning in a demo chair or a simulator that adjusts to different configurations.

The team might reposition your child several times, trying different back angles, seat depths, or lateral supports. They're watching how your child's posture changes, whether head control improves with trunk support, and whether their arms can reach and function better when seated differently.

If your child uses a communication device or has specific tasks they do from the chair (schoolwork, eating, playing), the team will test positioning for those activities. A seating system that works for passive sitting but prevents the child from reaching a tray or operating a joystick isn't functional.

For kids with high tone or significant positioning challenges, the evaluation can take longer. The team works slowly, checking comfort and skin tolerance as they adjust supports.

Your child doesn't need to do anything complicated. The team is assessing their body, not their ability to perform tasks during the appointment.

What Parents Should Bring

Your child's current chair, if they have one. The team needs to see what's working and what isn't. If the current chair is the problem, it's also the baseline for comparison.

Medical records and diagnoses relevant to mobility. If your child has cerebral palsy, spina bifida, muscular dystrophy, or another condition affecting posture and positioning, the team needs that documentation for the prescription and insurance justification.

A list of activities your child does from the chair: school, home routines, transportation needs, therapy, sports. Seating isn't just about sitting still. It's about function. If your child needs to use a tablet, eat meals, or participate in gym class from the chair, the team needs to know.

Insurance information, including your card and any prior authorization paperwork if you've already started that process. The ATP will document everything needed for insurance approval, but having your information on hand speeds things up.

Any positioning concerns from teachers or therapists. If your child's teacher says they slide forward in the chair by lunchtime, or their PT notes they're leaning heavily to one side, share that. The people who see your child daily often catch patterns the clinic team won't observe in a one-hour visit.

Questions to Ask

How long is the evaluation? Some clinics complete the assessment in one visit. Others schedule a follow-up to trial equipment once it arrives.

Will we try equipment today? Some clinics have demo chairs on-site. Others take measurements and order a trial system that comes in weeks later.

How does the insurance approval process work? Ask what documentation the clinic submits, typical approval timelines for your insurer, and whether the clinic handles appeals if the first request is denied. For families on Medicaid, ask whether the clinic is an in-network DME provider.

When will the chair be ready? Custom seating systems can take weeks to months, depending on the manufacturer, customization level, and insurance approval speed. The ATP should give you a realistic timeline.

What happens during the trial period? Most clinics offer a trial period once the equipment arrives. Your child uses the system at home and school for a few weeks, then returns for adjustments before finalizing the order. Ask how long the trial lasts and whether changes can be made during that window.

How often will we reassess? Children grow. Seating systems need regular reassessment to ensure fit, alignment, and function as the child's body changes. Ask how often the clinic recommends follow-ups.

What Happens After the Evaluation

The ATP writes a detailed letter of medical necessity documenting why your child needs the specific seating system recommended. This goes to your insurance company along with the prescription from the physiatrist or physician.

If you're using Medicaid, the clinic typically submits to your state's DME program. Private insurance requires prior authorization. The approval process can take days or weeks depending on the insurer and the complexity of the system.

Once approved, the equipment is ordered. For custom systems, the manufacturer builds it to the exact specifications documented during the evaluation.

When the chair arrives, you return to the clinic for delivery and fitting. The team adjusts every component, checks positioning, and makes sure your child can operate or be positioned safely. This is also when they teach you and any caregivers how to adjust the chair, transfer your child, and maintain the equipment.

Many clinics include a trial period before finalizing everything. Your child takes the chair home and to school. You report back on what's working and what isn't. The team makes adjustments before the system is finalized and billed to insurance.

Loaner equipment is common at major pediatric rehab centers during the trial period, especially if your child's current chair is unsafe or non-functional.

When to Schedule a Seating Evaluation

If your child already has a wheelchair and you notice any of these signs, it's time to schedule a reassessment:

• They've outgrown the chair (knees higher than hips, feet dragging, shoulders above the backrest)
• They're sliding forward or leaning heavily to one side by the end of the day
• They have skin redness or pressure sores from sitting
• Their function has changed (they can no longer reach their tray, operate controls, or hold their head up as they used to)

Children typically need new seating systems every two to three years as they grow. Some kids need reassessment more often if their condition progresses or if they grow quickly.

For first-time wheelchair users, the referral usually comes from a physiatrist, neurologist, or orthopedic surgeon after they determine that independent mobility or safe sitting requires equipment support.

Why Seating Clinics Exist

A wheelchair isn't just a seat with wheels. It's a positioning system that affects your child's ability to breathe, digest, use their hands, see at eye level with peers, and participate in daily life without pain or skin breakdown.

Getting it wrong has consequences: pressure sores, worsening scoliosis, hip subluxation, decreased function, and a child who can't tolerate sitting long enough to attend school or meals.

Seating clinics exist because proper assessment requires expertise most pediatricians and general therapists don't have. The intersection of diagnosis, growth, function, equipment options, and insurance justification is a specialized field. The ATP and therapy team translate your child's clinical needs into a functional, fundable seating system.

Seating systems aren't permanent. They change as your child grows, and reassessments happen regularly. The clinic you're walking into for the first time is likely a place you'll return to for years as your child's needs and body change.

Related: Pediatric Wheelchairs: Manual vs. Power and When Kids Are Ready covers decision-making for first-time wheelchair users. Tilt-in-Space Wheelchairs: When and Why Your Child Needs Pressure Relief explains one positioning feature often recommended during seating evaluations. When to Replace Your Child's Wheelchair: Fit Indicators and Insurance Timeline walks through growth-driven reassessment timelines.