What is a GRID?
The Global Registration Identifier for Donors (GRID) is a 19-character identifier composed of three elements:
- A 4-digit Issuing Organization Number (ION) – The NMDP/Be The Match ION is 3553
- A 13-character Registration Donor Identifier (RDI) assigned by the issuing organization
- A 2-digit checksum – a calculated number that ensures the preceding 17 digits are accurate and not mistyped
Searching via GRID
Last modified: Sep 21, 2021