# Microchip requirements for all dogs · United States — The dated, ordered steps for taking a dog, cat or ferret into the United States, the European Union or Great Britain — microchip, rabies vaccination, blood test and the waiting periods between them, quoted from the law itself

For Microchip requirements for all dogs · United States, entering is United States; provision is Microchip requirements for all dogs; applies to is All dogs presented for admission into the United States; what is required is must have a microchip implanted prior to arrival at the U.S. port; order it must come in is The microchip must have been implanted on or before the date the current rabies vaccine was administered, recorded from its source on 2026-08-28; source re-checked 2026-09-15.

- **Entering:** United States _(verified: appears in the quote below)_
- **Provision:** Microchip requirements for all dogs _(verified: appears in the quote below)_
- **Applies to:** All dogs presented for admission into the United States _(verified: appears in the quote below)_
- **What is required:** must have a microchip implanted prior to arrival at the U.S. port _(verified: appears in the quote below)_
- **Order it must come in:** The microchip must have been implanted on or before the date the current rabies vaccine was administered _(verified: appears in the quote below)_
- **If it is not met:** Rabies vaccines administered prior to the implantation of a microchip are invalid. _(verified: appears in the quote below)_
- **Citation:** 42 CFR 71.51(g) _(our reading, not quoted from the source)_

## What the source says

> Microchip requirements for all dogs. (1) All dogs presented for admission into the United States must have a microchip implanted prior to arrival at the U.S. port. (2) The microchip must have been implanted on or before the date the current rabies vaccine was administered. Rabies vaccines administered prior to the implantation of a microchip are invalid.

## Source

- https://www.ecfr.gov/current/title-42/chapter-I/subchapter-F/part-71/subpart-F/section-71.51

Last verified: 2026-09-15. Review by: 2026-12-26.
Part of [The dated, ordered steps for taking a dog, cat or ferret into the United States, the European Union or Great Britain — microchip, rabies vaccination, blood test and the waiting periods between them, quoted from the law itself](https://referencesource.org/pet-travel-entry-requirements/).