Extension Policy for K99/R00 Eligibility


NIH recognizes that a lot can happen to interrupt the 4-year K99 eligibility window. Since one of the most popular reasons for extension requests involve childbirth, NIH will approve an extension of one year for childbirth, consistent with the NIH Extension Policy for Early Stage Investigator Status (ESI), effective immediately. Men, those adopting children, and same-sex partners of individuals giving birth can also apply for an extension.

For more information, see the full Guide Notice.


  1. I am planning to submit K99 in Feb next year. Given the new policy for K99 Eligibility, I will have one year extension due to childbirth. Could you please let me know through where I can submit the request? I got my PhD degree in Dec 2015.
    Thank you so much,

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