NIH Exploratory/Developmental Research Grant Program ( Parent R21 Clinical Trial Not Allowed) | PA 18 489

Opportunity Information: Apply for PA 18 489

The NIH Exploratory/Developmental Research Grant Program (Parent R21, Clinical Trial Not Allowed) is a discretionary NIH grant mechanism designed to fund early-stage, exploratory, or developmental research in biomedical, behavioral, and clinical research areas, as long as the work does not involve a clinical trial. The core purpose of this opportunity is to help investigators pursue promising ideas that are still at a conceptual or formative stage, where preliminary data may be limited and the direction may be more experimental than confirmatory. NIH uses the R21 mechanism to encourage projects that may be higher risk than a typical research proposal but that could generate outsized rewards, such as opening a new line of inquiry, producing a breakthrough, or creating foundational tools that make later-stage research much more feasible.

Projects supported under this announcement are expected to push boundaries in some way, either by testing innovative hypotheses or by building something new that can change what is possible in a field. That includes the development of novel techniques, agents, methodologies, models, or applications. In practical terms, an R21 under this parent announcement is often used to establish proof-of-concept, generate key feasibility data, refine a new method or platform, or explore an unproven but potentially transformative approach. The emphasis is not on delivering a fully validated, mature solution, but on producing the critical early evidence or prototype that justifies and enables larger follow-on studies.

A central limitation of this specific funding opportunity is that it does not accept clinical trials. Applicants need to ensure that the proposed research is not a clinical trial by NIH definitions, meaning it should not prospectively assign human participants to interventions to evaluate effects on health-related biomedical or behavioral outcomes. While the program can still be relevant to clinically oriented research questions, the work must be structured in a way that remains non-trial in nature, such as preclinical studies, secondary analyses, observational studies that do not assign interventions, tool development, or other developmental research that stops short of clinical trial conduct.

The opportunity is offered by the National Institutes of Health and is listed under Funding Opportunity Number PA 18 489. It uses the grant funding instrument and falls under the broad activity categories of Education, Environment, and Health, reflecting NIH's wide scientific scope. The opportunity is associated with multiple CFDA numbers (now commonly referred to as Assistance Listing numbers), including 93.113, 93.121, 93.172, 93.173, 93.213, 93.273, 93.279, 93.307, 93.361, 93.846, 93.855, 93.866, 93.867, and 93.879, which correspond to different NIH Institutes, Centers, and program areas that may participate in the parent R21 framework.

In terms of funding level, the provided source data lists an award ceiling of $200,000. This ceiling signals that awards under this opportunity are meant to be modest, targeted investments appropriate for exploratory work rather than large, multi-component efforts. The announcement data also shows an original closing date of 2019-02-07 and a creation date of 2017-12-06, which helps place the opportunity in time within NIH's parent announcement cycle.

Eligibility is broad and includes many types of U.S.-based organizations as well as certain non-U.S. entities. Eligible applicants named in the source include state, county, city or township, and special district governments; independent school districts; public and state-controlled institutions of higher education; private institutions of higher education; federally recognized Native American tribal governments; and Native American tribal organizations that are not federally recognized tribal governments. Also eligible are public housing authorities and Indian housing authorities; nonprofits with or without 501(c)(3) status (other than institutions of higher education); for-profit organizations other than small businesses; small businesses; and an "others" category that captures additional eligible organization types under NIH policy. The announcement also explicitly highlights additional eligible applicant categories such as Alaska Native and Native Hawaiian Serving Institutions; Asian American Native American Pacific Islander Serving Institutions (AANAPISIs); Hispanic-serving Institutions; Historically Black Colleges and Universities (HBCUs); Tribally Controlled Colleges and Universities (TCCUs); faith-based or community-based organizations; eligible federal agencies; regional organizations; U.S. territories or possessions; Indian/Native American tribal governments other than federally recognized; and non-domestic (non-U.S.) entities, meaning foreign organizations can be eligible depending on NIH rules and the specific fit of the work.

Overall, this grant opportunity is best understood as NIH's standard pathway for supporting innovative, early-stage research ideas that could change a field but are not yet ready for larger-scale funding. It is intentionally structured to encourage creativity and calculated risk, while drawing a bright line around the exclusion of clinical trials. Applicants that can clearly articulate an important problem, a novel approach, and a credible plan to generate decisive early results within a limited budget are generally the best match for the R21 parent announcement.

• The National Institutes of Health in the education, environment, health sector is offering a public funding opportunity titled "NIH Exploratory/Developmental Research Grant Program ( Parent R21 Clinical Trial Not Allowed)" and is now available to receive applicants.
• Interested and eligible applicants and submit their applications by referencing the CFDA number(s): 93.113, 93.121, 93.172, 93.173, 93.213, 93.273, 93.279, 93.307, 93.361, 93.846, 93.855, 93.866, 93.867, 93.879.
• This funding opportunity was created on 2017-12-06.
• Applicants must submit their applications by 2019-02-07. (Agency may still review applications by suitable applicants for the remaining/unused allocated funding in 2026.)
• Each selected applicant is eligible to receive up to $200,000.00 in funding.
• Eligible applicants include: State governments, County governments, City or township governments, Special district governments, Independent school districts, Public and State controlled institutions of higher education, Native American tribal governments (Federally recognized), Public housing authorities/Indian housing authorities, Native American tribal organizations (other than Federally recognized tribal governments), Nonprofits having a 501 (c) (3) status with the IRS, other than institutions of higher education, Nonprofits that do not have a 501 (c) (3) status with the IRS, other than institutions of higher education, Private institutions of higher education, For-profit organizations other than small businesses, Small businesses, Others.

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