Decoding NIH Grant Numbers


Have you ever wondered what each part of an NIH grant number means? Decode that string of letters and numbers with this helpful cheat sheet. After grasping the basics, you’ll be able to quickly tell if an application is new, which NIH institute or center (IC) is funding the grant, and which support year it is in just by glancing at the number. Or you may even want to print the cheat sheet and use it is a handy reference for IC codes/acronyms and application types.

The grant number is used for many things, one of which is acknowledging Federal funding. To learn more about this important use, see our website on Communicating and Acknowledging Federal Funding.

diagram of grant number format for acknowledging federal funding

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