What is a GRID?

The Global Registration Identifier for Donors (GRID) is a 19-character identifier composed of three elements:

  1. A 4-digit Issuing Organization Number (ION) – The NMDP/Be The Match ION is 3553
  2. A 13-character Registration Donor Identifier (RDI) assigned by the issuing organization
  3. A 2-digit checksum – a calculated number that ensures the preceding 17 digits are accurate and not mistyped

GRID breakdown:

Searching via GRID

  • On all pages within the Donor tab, the default search method is via GRID
  • Search via the 19-character GRID for each donor in the “Enter ID” section
  • Example of a successful search
Last modified: Sep 21, 2021