What does the Unique device identifier (UDI) symbol look like?

The letters UDI in capitals inside a rectangular frame. It is also called “UDI”, “UDI carrier” and “Unique Device Identifier”.

Which standard defines the Unique device identifier (UDI) symbol?

It is listed as ISO 15223-1-5.7.10.

Unique device identifier (UDI) symbol: the letters UDI in capitals inside a rectangular frame — ISO 15223-1-5.7.10

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Medical device label symbols Medical device & pharmacy labels

Unique device identifier (UDI)

The letters UDI in capitals inside a rectangular frame. · also called “UDI”, “UDI carrier”, “Unique Device Identifier”

What the Unique device identifier (UDI) symbol means

Unique device identifier carrier

Marks the carrier that contains the device's unique device identifier (UDI) information, such as the code printed next to it. Read or scan that code to identify the device.

Source · Official website Medical device manufacturer's digital symbols glossary · checked Nov 11, 2026

Where it appears

Medical device label

ISO 15223-1
—This meaning

Questions about the Unique device identifier (UDI) symbol

What does the Unique device identifier (UDI) symbol mean?: Marks the carrier that contains the device's unique device identifier (UDI) information, such as the code printed next to it. Read or scan that code to identify the device.
What does the Unique device identifier (UDI) symbol look like?: The letters UDI in capitals inside a rectangular frame. It is also called “UDI”, “UDI carrier” and “Unique Device Identifier”.
Which standard defines the Unique device identifier (UDI) symbol?: It is listed as ISO 15223-1-5.7.10.

Checked against the source · Nov 11, 2026 · How we verify

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