Written and maintained by CASRAI Editorial Board
Last updated
General product information only, not medical advice. A clinician or therapist decides which device suits a particular person.
Overview: the main types of mobility aids
Mobility aids are devices that support walking or replace it. In U.S. federal rules they fall into two broad groups: walking aids that carry part of a person’s weight (canes, crutches, walkers) and wheeled devices for people who cannot walk or cannot walk far (wheelchairs and scooters). The FDA lists each of these as a separate device type in 21 CFR Part 890, and Medicare names them as examples of durable medical equipment.
This page lines the types up against what the regulations actually say, so the differences are stated by source rather than by sales copy. For a deeper look at one type, see the guides on ambulatory aids, wheelchairs and rollators.
Types table: what each device is, and its limits
| Type | What the FDA regulation says it is | Weight support / use | FDA class |
|---|---|---|---|
| Cane | A device for medical purposes that provides minimal weight support while walking. Examples named: standard cane, forearm cane, and canes with a tripod, quad or retractable stud tip (21 CFR 890.3075). | Minimal | Class I; exempt from premarket notification, subject to 21 CFR 890.9 |
| Crutch | A device for use by disabled persons to provide minimal to moderate weight support while walking (21 CFR 890.3150). | Minimal to moderate | Class I; exempt from premarket notification, subject to 21 CFR 890.9 |
| Mechanical walker | A four-legged device with a metal frame that gives moderate weight support while walking, used by disabled persons who lack strength, good balance or endurance (21 CFR 890.3825). | Moderate | Class I; exempt from premarket notification, subject to 21 CFR 890.9 |
| Mechanical (manual) wheelchair | A manually operated device with wheels that provides mobility to persons restricted to a sitting position (21 CFR 890.3850). | Seated mobility, moved by hand | Class I (general controls) |
| Powered wheelchair | A battery-operated device with wheels that provides mobility to persons restricted to a sitting position (21 CFR 890.3860). | Seated mobility, battery-driven | Class II (performance standards) |
| Motorized three-wheeled vehicle (scooter) | A gasoline-fueled or battery-powered device used for outside transportation by disabled persons (21 CFR 890.3800). | Outside transportation | Class II (performance standards) |
Two limits follow directly from the table. First, the three walking aids differ by how much weight they support (minimal, minimal to moderate, moderate). Second, the FDA describes a scooter as a vehicle for outside transportation, while both wheelchair types are defined by serving people restricted to a sitting position. The differences between the two powered options are covered in scooter vs power wheelchair.
Classification differs by device: the two walking aids and the manual chair carry general controls, whereas powered wheelchairs and three-wheeled vehicles are Class II, which the regulation ties to performance standards.
How to choose by setting
Home care
Medicare’s definition of durable medical equipment is built around the home: the item must withstand repeated use, be used for a medical reason, be typically useful only to someone sick or injured, be used in the home, and be expected to last at least 3 years. Medicare lists canes, crutches, walkers, and wheelchairs and scooters among covered examples, and says the list “includes, but isn’t limited to” these items. Part B covers DME when a doctor or other health care provider orders it for use in the home, and Medicare pays only when it comes from a supplier enrolled in Medicare. See Medicare DME coverage and rent vs buy for the surrounding rules.
Clinic, hospital and laboratory or facility use
The regulations define the device types by function (the weight support and seated or outdoor mobility described above), so the definitions above are the reference point for any facility inventory. A broader inventory of related equipment is in the durable medical equipment list.
What to check on the label
- Device type and intended use. Compare the product’s stated purpose with the definitions in the table, for example minimal weight support for a cane versus moderate for a walker.
- Manual or powered. A powered wheelchair is a battery-operated device and is Class II, while a manual wheelchair is Class I.
- Manufacturer instructions for use. The maker’s instructions are the authority on adjustment, assembly and limits of the specific model.
- Medicare supplier status. If coverage matters, Medicare pays only for DME obtained from enrolled suppliers.
Care and replacement
Follow the maker’s instructions for use for inspection, cleaning and parts. For Medicare purposes, DME is expected to last at least 3 years, which is a coverage definition and not a service-life guarantee for any one device.
FAQ
What are the main types of mobility aids?
Canes, crutches, walkers, manual wheelchairs, powered wheelchairs and motorized three-wheeled vehicles (scooters) are the types the FDA defines in 21 CFR Part 890 and that Medicare lists as covered DME examples.
Which mobility aids give the most weight support?
By the FDA definitions, canes give minimal support, crutches minimal to moderate and mechanical walkers moderate. Wheelchairs and scooters are defined by mobility rather than weight support while walking.
Does Medicare cover mobility aids?
Medicare lists canes, crutches, walkers, and wheelchairs and scooters as covered DME examples when ordered for use in the home and obtained from an enrolled supplier. Costs and rent or buy rules vary by item.
Sources
- Medicare.gov, Durable medical equipment (DME) coverage, https://www.medicare.gov/coverage/durable-medical-equipment-dme-coverage (checked 2026-10-30).
- 21 CFR 890.3075 Cane; 890.3150 Crutch; 890.3825 Mechanical walker; 890.3850 Mechanical wheelchair; 890.3860 Powered wheelchair; 890.3800 Motorized three-wheeled vehicle, at https://www.ecfr.gov/current/title-21/chapter-I/subchapter-H/part-890 (checked 2026-10-30).
