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Group 3 vs. Group 2 Power Chairs: The Real Line

Daryl Bullard·

People ask me about this like it's a quality question. "Is Group 3 the good one?" Sort of. But that's not really what the line is, and misunderstanding it is how people end up fighting a denial for four months over a chair they were never going to get approved for anyway.

Here's the honest version.

The line is a diagnosis, not a need

This is the part nobody says plainly, so I will: Medicare does not decide between Group 2 and Group 3 based on how much chair you need. It decides based on why you can't walk.

Under Medicare's Local Coverage Determination for Power Mobility Devices, you have to have a neurological condition, a myopathy, or a congenital or skeletal deformity to qualify for a Group 3 base. Spinal cord injury, MS, ALS, cerebral palsy, muscular dystrophy, spina bifida, stroke — those open the door.

Severe COPD? Advanced heart failure? Bilateral amputation without a neurological cause? Crushing arthritis? Those are real, disabling, life-limiting conditions. They do not get you a Group 3 base under Medicare. You may need a power chair every bit as badly as the person next to you at clinic, and you're still going to be looking at Group 2.

I think that's an unfair line. I've said so to anyone who'll listen. But it's the line, and knowing it up front saves you months.

What you actually get for the upgrade

Assuming you qualify, here's what the higher group buys you in real life.

You can cross a curb cut, a gravel driveway, or a lousy sidewalk without being rattled or stopped. Group 3 bases have real suspension. That suspension reduces the risk of tipping on uneven terrain and ramps, cuts driving fatigue by smoothing the ride, and for a lot of people reduces spasms and tone triggered by vibration. If you have spasticity, this is not a comfort feature. It's the difference between arriving somewhere ready to do something and arriving somewhere braced and exhausted.

You can keep up with people on a sidewalk instead of trailing them. Group 3 bases run up to 6 mph. Group 2 tops out lower. Sounds trivial until you've spent a year being the person everyone politely waits for.

You can leave the house all day without doing battery math. Group 3 bases carry larger batteries meant to last a full day. This matters most if you add power seating — a Group 2 base with a powered seating system on it can drop from around 7 miles of range to closer to 4 when you're in it all day.

You can be positioned properly, not just tilted. This is the one people underestimate. You can bolt tilt onto a Group 2 base, but as one ATP put it, it's essentially a standard Group 2 chair with a tilt on it — the positioning accessories and seating accommodations simply aren't there. If you need a specific back with lateral supports, a custom-contoured cushion, alternative drive controls, a mount for a communication device — the Group 3 base is built to take all that. The Group 2 isn't.

Group 2 is not a bad chair

I want to be careful here, because "Group 2" gets used like an insult in this industry and it shouldn't be. If you have decent trunk control, you're primarily indoors and around your neighborhood, and you don't need power seating, a Group 2 chair will serve you honestly for years. It's often lighter, sometimes tighter-turning indoors, and considerably cheaper to replace out of pocket.

The problem is when a Group 2 base is used to paper over a Group 3 need. That's how you get someone who can't independently shift their weight sitting in a chair that can't be adjusted enough to protect their skin.

What actually gets Group 3 approved

The diagnosis is necessary, not sufficient. You also need:

  • A specialty evaluation by a PT, OT, or physician with specific training in rehab wheelchair evaluations, documenting medical necessity for the chair and its specific features
  • That evaluator must have no financial relationship with the supplier
  • A supplier who employs a RESNA-certified ATP
  • A face-to-face mobility evaluation by your physician within six months of the order

And a note on seat elevation, since it changed recently and a lot of people still don't know: Medicare now covers power seat elevation if you meet the criteria for a Group 2 single or multiple power option chair or a Group 3 chair, and you meet the NCD criteria for seat elevation itself. Power standing systems are a separate matter and are not covered under that same decision.

The practical advice: don't let anyone submit paperwork that says "patient requires Group 3 for community mobility." That's a feelings statement. It needs to say what you can't do, why, and which specific feature of that specific base solves it — measurably. "Cannot independently perform weight shift; requires 45 degrees of tilt at minimum 4x daily" gets approved. "Wants to go outside" gets denied.

Ready for a Chair That Actually Fits?

Group 2 or Group 3, the base is only half the story — the fit, the seating, and the documentation are what make it work in your actual life. I'll tell you straight which side of the line you're on and what it means for you.

I work directly with clients to specify and order custom ultra-lightweight wheelchairs — no middlemen, no upsells, just the chair that fits your life.

Get started at wheelchair.direct — answer a few questions and I'll reach out personally.