Whether a product is a medical device is decided by the definition in
Art. 2(1) MDR: a medical purpose defined by the manufacturer, and a principal
intended action that is not achieved by pharmacological, immunological or
metabolic means. An IVD is a medical device that examines specimens
derived from the human body in vitro and has one of the purposes listed in
Art. 2(2) IVDR.
Art. 1(6) MDR draws the outer boundaries. Medicinal products, advanced therapy
medicinal products, cosmetic products under Regulation (EC) No 1223/2009 and
food are outside the MDR. For devices incorporating a medicinal substance or
intended to administer medicinal products, Art. 1(8) and (9) set out which
rules apply. If a product, taking into account all its characteristics, may
be both a medicinal product and another product, medicinal product law takes
precedence (Art. 2(2) Directive 2001/83/EC).
| MDR | IVDR |
|---|
| Classes | I, IIa, IIb, III (Art. 51) | A, B, C, D (Art. 47) |
| Rules in Annex VIII | 22, with implementing rules in Chapter II | 7, with implementing rules in Section 1 |
| Several rules apply | strictest rule and sub-rule (Section 3.5) | rule resulting in the higher class (Section 1.9) |
| Software | class of the device it drives, or standalone, Rule 11 (Section 3.3) | class of the device it drives, or standalone (Section 1.4) |
| Dispute with the notified body | competent authority where the manufacturer is registered (Art. 51(2)) | competent authority where the manufacturer is registered (Art. 47(2)) |
| MDCG guidance | MDCG 2021-24 Rev. 1, April 2026 | MDCG 2020-16 Rev. 5, September 2026 |
The class drives the conformity assessment route and thereby whether, and to
what extent, a notified body is involved. That is why the MDR and IVDR require
qualification and class to be justified in the technical documentation, and
why the notified body checks both before it issues a quotation.
For borderline cases there are two sources outside the regulations: the MDCG
guidance and the Manual on borderline and classification, in which the
competent authorities record individual cases. Neither is binding. A
classification only becomes binding through a Commission implementing act
(Art. 4 and 51(3) MDR, Art. 3 and 47(3) IVDR) or a decision of the competent
authority.
Outside the scope of this page are the route from the class to
CE marking with the choice of
conformity assessment procedure, the development of software to IEC 62304,
IVDR implementation for a whole portfolio, and the choice of pathway at the
FDA.