Which Y21 codes can be used in a EUDAMED device record?

46 of the 60 codes listed under Y21 (Communication and Information Management Aids) are terminal and can be selected. The other 14 are branch headings that cannot.

How deep is the Y21 hierarchy?

The Y21 branch runs 4 levels below the group code. Its largest sub-branch is Y2145 (Hearing Aids), which holds 13 of the 46 terminal codes.

How many Y21 codes are catch-all entries?

10 terminal codes under Y21 are "- Other" entries and 1 is an "- Accessories" entry, 24% of the branch. The remaining 35 name a specific device type.

EMDN Y21: Communication and Information Management Aids

Complete hierarchy for EMDN group Y21 in category Y (Devices for Persons with Disabilities not Included in Other Categories): 46 terminal codes, EMDN v2026. Terminal codes are the ones accepted in a EUDAMED device record.

Registered classes, as of 8 Sep 2026. For each code with at least 20 registrations under a legislation, the chip shows how devices registered in EUDAMED under that code are classed, counted once per primary UDI-DI and kept separate for each legislation. It is not a determination. The class of a device comes from the MDR and IVDR classification rules for its intended purpose. MDD and IVDD classes are the directive classification and can differ from the class the same device would have under MDR or IVDR.

Y21Communication and Information Management Aids
- Y2103Optical Aids
  - Y210306Prismatic Ophthalmic Lenses for Raising and Lowering the Eye with Prosthesesterminal
  - Y210321Far Sightedness Telescopic Systems/Spectaclesterminal
  - Y210324Near Sightedness Telescopic Systems/SpectaclesMDR 100.0% Class I · n=782terminal
    Registered in EUDAMED under MDR with this code: 782 of 782 devices carry Class I on their registration (as of 8 Sep 2026).
    782 Class I (100.0%)
    Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination.
  - Y210330Magnifying Achromatic Doublet LensesMDR 100.0% Class I · n=417terminal
    Registered in EUDAMED under MDR with this code: 417 of 417 devices carry Class I on their registration (as of 8 Sep 2026).
    417 Class I (100.0%)
    Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination.
  - Y210333Prismatic Spectaclesterminal
  - Y210336Occlusion and Anti-Radiation Filtersterminal
  - Y210399Optical Aids - OtherMDR 100.0% Class I · n=65MDD 100.0% Class I · n=24terminal
    Registered in EUDAMED under MDR with this code: 65 of 65 devices carry Class I on their registration (as of 8 Sep 2026).
    65 Class I (100.0%)
    Registered in EUDAMED under MDD with this code: 24 of 24 devices carry Class I on their registration (as of 8 Sep 2026).
    24 Class I (100.0%)
    Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination. MDD and IVDD classes are the directive classification and can differ under MDR or IVDR.
- Y2106Optical Electronic Aids
  - Y210603Video MagnifiersMDR 100.0% Class I · n=80terminal
    Registered in EUDAMED under MDR with this code: 80 of 80 devices carry Class I on their registration (as of 8 Sep 2026).
    80 Class I (100.0%)
    Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination.
  - Y210606Ocr Systemsterminal
  - Y210609Magnifiers for Personal Computersterminal
  - Y210699Electronic Optical Aids - Otherterminal
- Y2109Personal Computer Input and Output Peripheral Equipment
  - Y210905External Sensor Interfacesterminal
  - Y210906Mouse and Keyboard EmulatorsMDR 100.0% Class I · n=42terminal
    Registered in EUDAMED under MDR with this code: 42 of 42 devices carry Class I on their registration (as of 8 Sep 2026).
    42 Class I (100.0%)
    Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination.
  - Y210915Vocal Synthesis Devicesterminal
  - Y210924Arm SupportsMDR 100.0% Class I · n=119terminal
    Registered in EUDAMED under MDR with this code: 119 of 119 devices carry Class I on their registration (as of 8 Sep 2026).
    119 Class I (100.0%)
    Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination.
  - Y210999Personal Computer Input and Output Peripheral Equipment - OtherMDR 100.0% Class I · n=81terminal
    Registered in EUDAMED under MDR with this code: 81 of 81 devices carry Class I on their registration (as of 8 Sep 2026).
    81 Class I (100.0%)
    Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination.
- Y2115Writing Machines and Text Processing Systems
  - Y211518Writing Softwareterminal
  - Y211599Writing Machines and Text Processing Systems - Otherterminal
- Y2127Non-Optical Reading Aids
  - Y212703Page-TurnersMDR 100.0% Class I · n=96terminal
    Registered in EUDAMED under MDR with this code: 96 of 96 devices carry Class I on their registration (as of 8 Sep 2026).
    96 Class I (100.0%)
    Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination.
  - Y212706BookrestsMDR 100.0% Class I · n=51terminal
    Registered in EUDAMED under MDR with this code: 51 of 51 devices carry Class I on their registration (as of 8 Sep 2026).
    51 Class I (100.0%)
    Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination.
- Y2136Telephones and Telephoning Aids
  - Y213603Easy Access Telephonesterminal
  - Y213609Telephone Communicatorsterminal
  - Y213624Telephone Handset Replacement Devices and Call Signalersterminal
  - Y213699Telephones and Telephoning Aids - Otherterminal
- Y2139Sound Transmission Systems
  - Y213924Mf Receiver-Transmittersterminal
  - Y213999Sound Transmission Systems - Otherterminal
- Y2142Interpersonal Comunication Devices
  - Y214209Alphabetic and Symbolic CommunicatorsMDR 100.0% Class I · n=94terminal
    Registered in EUDAMED under MDR with this code: 94 of 94 devices carry Class I on their registration (as of 8 Sep 2026).
    94 Class I (100.0%)
    Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination.
  - Y214212Voice GeneratorsMDR 100.0% Class I · n=166terminal
    Registered in EUDAMED under MDR with this code: 166 of 166 devices carry Class I on their registration (as of 8 Sep 2026).
    166 Class I (100.0%)
    Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination.
  - Y214224Augmentative SoftwareMDR 100.0% Class I · n=30terminal
    Registered in EUDAMED under MDR with this code: 30 of 30 devices carry Class I on their registration (as of 8 Sep 2026).
    30 Class I (100.0%)
    Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination.
  - Y214299Devices for Interpersonal Comunication - OtherMDR 100.0% Class I · n=320terminal
    Registered in EUDAMED under MDR with this code: 320 of 320 devices carry Class I on their registration (as of 8 Sep 2026).
    320 Class I (100.0%)
    Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination.
- Y2145Hearing Aids
  - Y214506Air Conduction Hearing Aids
    - Y21450601Behind-the-Ear Hearing Aids (Btes)
      - Y2145060101Behind-the-Ear Hearing Aids with Receiver in the Device (Bte)MDR 99.9% Class IIa · n=11,365MDD 99.8% Class IIa · n=1,924terminal
        Registered in EUDAMED under MDR with this code: 11,364 of 11,365 devices carry Class IIa on their registration (as of 8 Sep 2026).
        11,364 Class IIa (99.9%)
        1 Class I (<0.1%)
        Registered in EUDAMED under MDD with this code: 1,922 of 1,924 devices carry Class IIa on their registration (as of 8 Sep 2026).
        1,922 Class IIa (99.8%)
        2 Class III (0.1%)
        Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination. MDD and IVDD classes are the directive classification and can differ under MDR or IVDR.
      - Y2145060102Behind-the-Ear Hearing Aids with Receiver in the Canal (Ric, Rite)MDR 100.0% Class IIa · n=15,642MDD 99.9% Class IIa · n=2,925terminal
        Registered in EUDAMED under MDR with this code: 15,642 of 15,642 devices carry Class IIa on their registration (as of 8 Sep 2026).
        15,642 Class IIa (100.0%)
        Registered in EUDAMED under MDD with this code: 2,924 of 2,925 devices carry Class IIa on their registration (as of 8 Sep 2026).
        2,924 Class IIa (99.9%)
        1 Class III (<0.1%)
        Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination. MDD and IVDD classes are the directive classification and can differ under MDR or IVDR.
    - Y21450602In-the-Ear Hearing Aids (Ites)
      - Y2145060201Hearing Aid in the-Ear (Ite)MDR 100.0% Class IIa · n=1,483MDD 100.0% Class IIa · n=976terminal
        Registered in EUDAMED under MDR with this code: 1,483 of 1,483 devices carry Class IIa on their registration (as of 8 Sep 2026).
        1,483 Class IIa (100.0%)
        Registered in EUDAMED under MDD with this code: 976 of 976 devices carry Class IIa on their registration (as of 8 Sep 2026).
        976 Class IIa (100.0%)
        Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination. MDD and IVDD classes are the directive classification and can differ under MDR or IVDR.
      - Y2145060202Hearing Aids in-the-Canal (Itc)MDR 100.0% Class IIa · n=1,108MDD 100.0% Class IIa · n=304terminal
        Registered in EUDAMED under MDR with this code: 1,108 of 1,108 devices carry Class IIa on their registration (as of 8 Sep 2026).
        1,108 Class IIa (100.0%)
        Registered in EUDAMED under MDD with this code: 304 of 304 devices carry Class IIa on their registration (as of 8 Sep 2026).
        304 Class IIa (100.0%)
        Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination. MDD and IVDD classes are the directive classification and can differ under MDR or IVDR.
      - Y2145060203Hearing Aids Completely-in-the-Canal (Cic)MDR 100.0% Class IIa · n=1,058MDD 100.0% Class IIa · n=135terminal
        Registered in EUDAMED under MDR with this code: 1,058 of 1,058 devices carry Class IIa on their registration (as of 8 Sep 2026).
        1,058 Class IIa (100.0%)
        Registered in EUDAMED under MDD with this code: 135 of 135 devices carry Class IIa on their registration (as of 8 Sep 2026).
        135 Class IIa (100.0%)
        Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination. MDD and IVDD classes are the directive classification and can differ under MDR or IVDR.
      - Y2145060204Hearing Aids Invisible-in-the-Canal (Iic)MDR 100.0% Class IIa · n=312MDD 100.0% Class IIa · n=46terminal
        Registered in EUDAMED under MDR with this code: 312 of 312 devices carry Class IIa on their registration (as of 8 Sep 2026).
        312 Class IIa (100.0%)
        Registered in EUDAMED under MDD with this code: 46 of 46 devices carry Class IIa on their registration (as of 8 Sep 2026).
        46 Class IIa (100.0%)
        Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination. MDD and IVDD classes are the directive classification and can differ under MDR or IVDR.
    - Y21450603Box Hearing AidsMDR 96.9% Class IIa · n=33MDD 100.0% Class IIa · n=67terminal
      Registered in EUDAMED under MDR with this code: 32 of 33 devices carry Class IIa on their registration (as of 8 Sep 2026).
      32 Class IIa (96.9%)
      1 Class I (3.0%)
      Registered in EUDAMED under MDD with this code: 67 of 67 devices carry Class IIa on their registration (as of 8 Sep 2026).
      67 Class IIa (100.0%)
      Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination. MDD and IVDD classes are the directive classification and can differ under MDR or IVDR.
  - Y214509Bone Conduction Hearing Aids
    - Y21450901Spectacle Hearing AidsMDR 2 classes · n=24terminal
      Registered in EUDAMED under MDR with this code, the 24 devices are split across classes (as of 8 Sep 2026).
      12 Class I (50.0%)
      12 Class IIa (50.0%)
      Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination.
    - Y21450902Headband Hearing AidsMDD 95.6% Class IIa · n=23terminal
      Registered in EUDAMED under MDD with this code: 22 of 23 devices carry Class IIa on their registration (as of 8 Sep 2026).
      22 Class IIa (95.6%)
      1 Class I (4.3%)
      Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination. MDD and IVDD classes are the directive classification and can differ under MDR or IVDR.
    - Y21450903Hearing Aids with Elastic Bandterminal
    - Y21450904Hearing Aids Using Adhesive Patchterminal
  - Y214580Hearing Aids or Hearing Devices - AccessoriesMDR 3 classes · n=2,271MDD 100.0% Class IIa · n=90terminal
    Registered in EUDAMED under MDR with this code, the 2,271 devices are split across classes (as of 8 Sep 2026).
    1,578 Class I (69.4%)
    683 Class IIa (30.0%)
    10 Class IIb (0.4%)
    Registered in EUDAMED under MDD with this code: 90 of 90 devices carry Class IIa on their registration (as of 8 Sep 2026).
    90 Class IIa (100.0%)
    Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination. MDD and IVDD classes are the directive classification and can differ under MDR or IVDR.
  - Y214599Hearing Aids - OtherMDR 2 classes · n=582MDD 100.0% Class IIa · n=49terminal
    Registered in EUDAMED under MDR with this code, the 582 devices are split across classes (as of 8 Sep 2026).
    348 Class IIa (59.7%)
    234 Class I (40.2%)
    Registered in EUDAMED under MDD with this code: 49 of 49 devices carry Class IIa on their registration (as of 8 Sep 2026).
    49 Class IIa (100.0%)
    Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination. MDD and IVDD classes are the directive classification and can differ under MDR or IVDR.
- Y2151Alarm Systems + Signalling, Indication and Reminder Aids
  - Y215112Clocks for Persons with Disabilitiesterminal
  - Y215199Alarm Systems + Signaling, Indication and Reminder Aids - OtherMDR 99.5% Class I · n=234terminal
    Registered in EUDAMED under MDR with this code: 233 of 234 devices carry Class I on their registration (as of 8 Sep 2026).
    233 Class I (99.5%)
    1 Class IIb (0.4%)
    Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination.
- Y2199Communication and Information Management Aids - OtherMDR 100.0% Class I · n=155terminal
  Registered in EUDAMED under MDR with this code: 155 of 155 devices carry Class I on their registration (as of 8 Sep 2026).
  - 155 Class I (100.0%)
  Counted once per primary UDI-DI, using the class on the registration. The class of a device comes from the MDR and IVDR classification rules for its intended purpose, so a code is evidence of how others registered, not a determination.

How Y21 is structured

terminal codes, selectable in a device record

branch headings, not selectable

name a specific device type

24%

fallback entries: Other and Accessories

The Communication and Information Management Aids branch runs 4 levels deep. 14 entries below are branch headings that group other codes rather than naming a device, so a classification has to resolve all the way down to one of the 46 codes marked terminal.

10 terminal codes are “- Other” entries and 1 is an “- Accessories” entry, 24% of the branch. An “- Other” code is the residual slot for devices its siblings do not name, so it is worth ruling out every specific sibling before settling on one.

The largest sub-branch is Y2145 (Hearing Aids), holding 13 of the 46 terminal codes.

Frequently asked questions

Which Y21 codes can be used in a EUDAMED device record?: 46 of the 60 codes listed under Y21 (Communication and Information Management Aids) are terminal and can be selected. The other 14 are branch headings that cannot.
How deep is the Y21 hierarchy?: The Y21 branch runs 4 levels below the group code. Its largest sub-branch is Y2145 (Hearing Aids), which holds 13 of the 46 terminal codes.
How many Y21 codes are catch-all entries?: 10 terminal codes under Y21 are "- Other" entries and 1 is an "- Accessories" entry, 24% of the branch. The remaining 35 name a specific device type.

Not sure which level to stop at, or which of two plausible codes to submit? The guide to choosing an EMDN code walks the decision level by level, with a worked example and the mistakes that get a EUDAMED registration rejected.

Classifying more than a handful of devices?

EUDAMate maps your device list against all 6,773 terminal EMDN codes with confidence-scored suggestions you review and confirm. Start with a free Readiness Check on your own data.

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Other groups in category Y

Y05Abilities Learning and Training Devices Y06External Prostheses and Orthoses Y09Personal Care Aids Y12Personal Mobility Devices Y15Domestic Activities Aids Y18Aids, Furniture and Home Aids for Persons with Disabilities Y24Object Manipulation Devices Y99Devices for Persons with Disabilities not Included in Other Categories - Other

Source: European Commission, EMDN v2026 official release. Terminal codes are the only codes accepted in a EUDAMED device record. EMDN is a nomenclature, not a risk classification. MDR/IVDR class is determined separately.