| Meni Box | 03503190058006 | Menicon Pharma | Class I | |
| MeniCase | 03503190054008 | Menicon Pharma | Class I | |
| MeniCup | 03503190055005 | Menicon Pharma | Class I | |
| Meni Holder | 03503190059003 | Menicon Pharma | Class I | |
| Mesopic Testing Lenses | +G211500053-021R | Good-Lite Company | Class I | |
| Mesopic Testing Lens: ESV3000™, ESC2000™ and CSV-1000® - 1.5 Neutral Density Filter | +G211500053-011Q | Good-Lite Company | Class I | |
| m-eye vision | 04260725761419 | Optima Medical Swiss AG | Class IIa | |
| MicroREC | 04260738270281 | Custom Surgical GmbH | Class I | |
| MicroREC 3D | 04260738270427 | Custom Surgical GmbH | Class I | |
| MicroREC 3D | 04260738270434 | Custom Surgical GmbH | Class I | |
| MicroREC 3D | 04260738270441 | Custom Surgical GmbH | Class I | |
| MicroREC 3D | 04260738270458 | Custom Surgical GmbH | Class I | |
| MicroREC 3D | 04260738270465 | Custom Surgical GmbH | Class I | |
| MicroREC 3D | 04260738270472 | Custom Surgical GmbH | Class I | |
| MicroREC 3D | 04260738270489 | Custom Surgical GmbH | Class I | |
| MicroREC 3D | 04260738270496 | Custom Surgical GmbH | Class I | |
| MicroREC Ultra | 04260738270502 | Custom Surgical GmbH | Class I | |
| MicroREC Ultra | 04260738270519 | Custom Surgical GmbH | Class I | |
| MicroREC Ultra | 04260738270526 | Custom Surgical GmbH | Class I | |
| MicroREC Ultra | 04260738270533 | Custom Surgical GmbH | Class I | |
| MicroREC Ultra | 04260738270540 | Custom Surgical GmbH | Class I | |
| MicroREC Ultra | 04260738270557 | Custom Surgical GmbH | Class I | |
| MicroSponge | 00380651000025 | Alcon Laboratories, Inc. | Class Is | |
| MicroSponge | 00380651000032 | Alcon Laboratories, Inc. | Class Is | |
| miLOOP | 04049539104502 | Carl Zeiss Meditec AG | Class IIa | |
| MiraUV | 08057018170517 | IROMED GROUP S.R.L. | Class IIb | |
| MiraUV | 08057018170944 | IROMED GROUP S.R.L. | Class IIb | |
| Miren | 08057018170227 | IROMED GROUP S.R.L. | Class IIb | |
| Miren | 08057018170906 | IROMED GROUP S.R.L. | Class IIb | |
| Mirror Chart | 06977443390002 | CJO(Shanghai) Technology Co., Ltd | Class I | |
| MIXTEARS | 08033959760543 | C.O.C. FARMACEUTICI S.R.L. | Class IIb | |
| Mobile | +G015501 | HS DOMS GmbH | Class I | |
| Mobile ACCU | +G015502 | HS DOMS GmbH | Class I | |
| Mobile Slit Lamp MS1 | 04560323641138 | Takagi seiko | Class I | |
| Moisture Chamber: Goggles - Large, Single | +G2116817001+ | Good-Lite Company | Class I | |
| Moisture Chamber: Goggles - Small, Single | +G2116818001% | Good-Lite Company | Class I | |
| Moisture Chamber: Large, 2 pack | +G21167580214 | Good-Lite Company | Class I | |
| Moisture Chamber: Small, 2 pack | +G21167590215 | Good-Lite Company | Class I | |
| Monomanual I/A System reusable | 07640137450625 | Bürki inno med AG | Class I | |
| Monomanual I/A System reusable | 07640137450632 | Bürki inno med AG | Class I | |
| Monomanual I/A System reusable | 07640137450649 | Bürki inno med AG | Class I | |
| Monomanual I/A System reusable | 07640137450656 | Bürki inno med AG | Class I | |
| Monomanual I/A System reusable | 07640137450663 | Bürki inno med AG | Class I | |
| Monomanual I/A System reusable | 07640137450670 | Bürki inno med AG | Class I | |
| Monomanual I/A System reusable | 07640137450687 | Bürki inno med AG | Class I | |
| Monomanual I/A System reusable | 07640137450694 | Bürki inno med AG | Class I | |
| Monomanual I/A System reusable | 07640137451103 | Bürki inno med AG | Class I | |
| Monomanual I/A System reusable | 07640137451509 | Bürki inno med AG | Class I | |
| Monomanual I/A System reusable | 07640137451790 | Bürki inno med AG | Class I | |
| Monomanual I/A System reusable | 07640137451806 | Bürki inno med AG | Class I | |
UDI Compass