Written and maintained by CASRAI Editorial Board
Last updated
General product and regulatory information only; this page is not medical advice and does not describe fitting or clinical procedures.
Short answer
A prosthetic hand is an artificial hand worn in place of a missing or absent one. In US regulation it is not a stand-alone device category: FDA treats a mechanical or powered hand as an external limb prosthetic component (Class I, exempt from 510(k)), while an upper-extremity prosthesis with more than two simultaneously powered degrees of freedom is a Class II prescription device with special controls.
Definition and scope
Under 21 CFR 890.3420, an external limb prosthetic component is a device intended for medical purposes that, put together with other appropriate components, constitutes a total prosthesis. The regulation lists “mechanical or powered hand, hook, wrist unit, elbow joint, and shoulder joint components” among its examples. A hand is therefore one component of a prosthesis, alongside the socket, wrist and elbow parts it is combined with. The lower-limb counterpart is covered in prosthetic foot types and FDA class.
How a prosthetic hand is used in practice
An educational overview in Frontiers for Young Minds (checked 2026-10-30) groups upper-limb prostheses into passive and active designs. Passive hands are cosmetic or simple mechanical devices. Active hands are either body-powered, operated through a harness, or externally powered, where electrodes pick up muscle signals (myoelectric control). The same overview compares the designs on weight, durability, range of motion and the training needed to use them, and notes that restoring sensory feedback remains unsolved.
The FDA labeling requirement for the more complex powered systems shows what use involves in practice: the Prosthetist and User Guide must cover training on assembly, fitting, programming, controls, operating modes, safety features and maintenance.
Types and how FDA classifies them
Product codes in FDA’s classification database map the regulatory split. Data from the openFDA classification endpoint, checked 2026-10-30:
| FDA product code | Device name in FDA database | Regulation | Class |
|---|---|---|---|
| IRA | Hand, External Limb Component, Mechanical | 21 CFR 890.3420 | I |
| IQZ | Hand, External Limb Component, Powered | 21 CFR 890.3420 | I |
| PAE | Upper Extremity Prosthesis With Multiple Simultaneous Degrees Of Freedom And Controlled Via Cutaneous Electromyography | 21 CFR 890.3450 | II |
Class I means general controls. For 890.3420 the device is exempt from premarket notification (see the FDA 510(k) premarket notification guide), subject to the limitations in 21 CFR 890.9, and exempt from the quality management system regulation except for records and complaint-file requirements. The IQZ record lists it as not implanted and not life-sustaining.
What the Class II special controls cover
21 CFR 890.3450 applies to a prescription upper-extremity prosthesis that includes a simultaneously powered elbow and/or shoulder, replaces a partially or fully amputated or congenitally absent upper extremity, and uses non-implanted electrical inputs (beyond simple manually controlled switches) for more than two independent, simultaneously powered degrees of freedom. Its special controls require:
- electrical safety, electromagnetic compatibility, thermal, mechanical, battery and wireless testing;
- software verification and validation and hazard analysis;
- non-clinical performance testing, including durability, worst-case simulated use, force sensors and hand release buttons;
- demonstration of the accuracy of features and safeguards;
- biocompatibility of patient-contacting parts;
- clinical experience and human factors evaluation, including adverse events;
- labeling in a Prosthetist and User Guide, covering warnings, training, the patient population and a test summary.
Where it matters for labs, clinics and supply decisions
The regulation, not the marketing label, determines the paperwork a hand component carries. A procurement or clinical-engineering file can record the product code, regulation number and class for each hand, and, for Class II systems, expect the Prosthetist and User Guide described above. For coverage and billing vocabulary, see DME HCPCS codes explained; for the wider equipment context, see ambulatory aids. The general ladder from Class I to PMA is explained in the FDA medical device classification from 510(k) to PMA.
Common misunderstandings
- “Powered means Class II.” Not by itself. A powered hand component (IQZ) is Class I under 890.3420; Class II applies to the multi-degree-of-freedom upper-extremity prosthesis in 890.3450.
- “Cosmetic means no function.” The educational overview describes passive hands as cosmetic or simple mechanical devices, so function varies by design rather than disappearing.
- “Bionic” is a regulatory category. It is not; the term does not appear in the regulations cited here, which classify by components, degrees of freedom and control.
- The hand is the whole prosthesis. The regulation defines the hand as one component of a total prosthesis.
Frequently asked questions
Is a prosthetic hand a medical device?
Yes. Under 21 CFR 890.3420 an external limb prosthetic component, including a mechanical or powered hand, is a device intended for medical purposes that, combined with other components, constitutes a total prosthesis.
What FDA class is a prosthetic hand?
A mechanical or powered hand component (product codes IRA and IQZ) is Class I under 21 CFR 890.3420 and exempt from 510(k). An upper-extremity prosthesis with more than two simultaneously powered degrees of freedom that includes a powered elbow and/or shoulder is Class II under 21 CFR 890.3450.
What are the main types of prosthetic hand?
An educational overview in Frontiers for Young Minds groups them as passive (cosmetic or simple mechanical) and active, which are either body-powered through a harness or externally powered, such as myoelectric designs controlled by muscle signals.
Is a myoelectric hand the same as a bionic hand?
“Bionic” is not a term used in the regulations cited on this page, which classify by components, degrees of freedom and control. Myoelectric describes control through electrodes that pick up muscle signals.
Sources
- eCFR, 21 CFR 890.3420, External limb prosthetic component: ecfr.gov (checked 2026-10-30)
- eCFR, 21 CFR 890.3450, Upper extremity prosthesis with greater than two simultaneous powered degrees of freedom: ecfr.gov (checked 2026-10-30)
- FDA Product Classification database, code IQZ: accessdata.fda.gov (checked 2026-10-30); product codes IRA and PAE: api.fda.gov device classification (checked 2026-10-30)
- Frontiers for Young Minds, educational overview of prosthetic limbs: kids.frontiersin.org (checked 2026-10-30)
