---
kind: "section"
citation: "21 C.F.R. § 830.40"
title: "21"
number: "830.40"
heading: "Use and discontinuation of a device identifier."
url: "https://uscodex.org/cfr/21/830.40"
---

# §830.40. Use and discontinuation of a device identifier.

- (a) Only one device identifier from any particular system for the issuance of unique device identifiers (UDIs) may be used to identify a particular version or model of a device. A particular version or model may be identified by UDIs from two or more systems for the issuance of UDIs.
- (b) A device identifier shall be used to identify only one version or model.
- (c) In the event that a version or model of a device is discontinued, its device identifier may not be reassigned to another device. If a discontinued version or model is re-introduced and no changes have been made that would require the use of a new device identifier, the device identifier that was previously in use may be used to identify the device.
- (d) In the event that an issuing agency relinquishes or does not renew its accreditation, you may continue to use a previously issued UDI until such time as [§ 830.50](/cfr/21/830.50.md) requires you to assign a new device identifier.

## Notes

### Amendments

[78 FR 58825, Sept. 24, 2013]

### Authority

Authority: 21 U.S.C. 321, 331, 352, 353, 360, 360d, 360i, 360j, 371.

### Source

Source: 78 FR 58823, Sept. 24, 2013, unless otherwise noted.

### Amendments

[78 FR 58825, Sept. 24, 2013]