How It Works

Choosing a Microchip

© Rood & Riddle Equine Hospital

Microchips must be ISO 11784/11785 compliant. This microchip has a unique 15-digit number that will be assigned only to your horse. Microchips starting with the prefix 900 cannot be used because these chips could have duplicate numbers.

The following are examples of acceptable and unacceptable chip numbers:

Acceptable: #977123456789012
Unacceptable: #900123456789012

Check your chip number before it is implanted.

Microchipping Process

The American Association of Equine Practitioners has determined that the implantation of a microchip is a veterinary procedure. The USHJA recommends that a licensed veterinarian supervise this procedure.

The following steps will be conducted to microchip your horse:

  • Before the microchip is implanted, the horse should be properly identified and checked for an existing microchip with a reader
  • The microchip should be implanted in the nuchal ligament, halfway between the poll and the withers on the left side of the horse
  • After the microchip has been implanted, it should be checked again with a reader to verify that it is still readable
© Rood & Riddle Equine Hospital

Reporting Your Horse’s Chip Number to USEF

Once a horse is microchipped, you may report your microchip number to the USEF through any of the following methods:

  • Online by signing into your My USEF My Way account and updating your horse’s record
  • Faxing to (859) 231-6662 or emailing to the Microchip Reporting Form, which may be used to report chip numbers for multiple horses
  • Completing the microchip field on a USEF Horse Recording/ ID Application

If your horse is not yet recorded with USEF or registered with the USHJA, you will need to com­plete a Horse Recording Form AND fill out the microchip number field on that form.

USEF Customer Care
(859) 258-2472
(please allow up to 24 hours response time)

Log onto and choose online support to live chat with a representative. USEF Customer Care representatives are available M-F 8:30am to 5pm ET