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NIH Science-Driven Research Project (RP1)

Ancillary Studies to Ongoing Clinical Projects

Funds short add-on studies riding on an already-running clinical trial, observational study, or patient registry.

Between cyclesNational Institutes of HealthGlobal

This NIH-wide notice pays for a focused add-on study that piggybacks on a clinical project that's already running and already funded — either an interventional clinical trial, an observational study, or a disease-specific registry collecting patient samples and data. The existing project (NIH calls it the “parent project”) supplies the patient cohort, infrastructure, and samples; your ancillary st

Funding for a focused add-on study — extra data collection, sample analysis, or a sub-study — that rides on an already-running clinical trial, observational study, or patient registry (the “parent project”). The ancillary study itself cannot be a new clinical trial.

CycleiHow often this grant runs — e.g. annually, on a rolling basis, or a one-off call.
Next deadlineiThe next date applications are due. Rolling means you can apply any time.15 Oct 2026
Decision timeiTypical time from the deadline to the funder's decision.26 weeks
Project durationiHow long the funded work is expected to run.
Award typeiThe form of funding — grant, equity, loan, tax credit, etc.Grant
Match fundingiThe share of project costs you must cover yourself. 0% = fully funded.
Funding pooliThe total budget available across all awards in this round.

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Last verified: 14 May 2026Funder reference: PAR-27-049Source: www.grants.gov