Opportunity Information: Apply for PAR 21 054
The National Institutes of Health (NIH) funding opportunity titled "Mechanistic Ancillary Studies to Ongoing Clinical Projects (R21 Clinical Trial Not Allowed)" (Funding Opportunity Number PAR-21-054) supports short, focused research projects that add a mechanistic component to clinical studies that are already underway. In practical terms, this program is meant for investigators who have access to an existing clinical project, cohort, or study infrastructure and want to leverage that resource to answer deeper "how" and "why" biological, behavioral, or physiological questions related to the parent clinical work. The key idea is that the proposed ancillary study should be mechanistic in nature and should be clearly tied to, and dependent on, the ongoing clinical project rather than standing alone as a separate new clinical endeavor.
This opportunity uses the NIH R21 mechanism, which is designed for exploratory and developmental research. R21 awards are typically used to support early-stage or high-impact ideas that may need preliminary testing, proof-of-concept work, or specialized assays to establish feasibility and generate data that can justify a larger follow-on grant. Here, the R21 is specifically aimed at ancillary mechanistic studies, meaning the project should take advantage of existing participants, samples, data streams, or follow-up already being collected by a parent study. The grant is categorized under Health and is associated with CFDA number 93.846.
A central restriction is embedded directly in the title: "Clinical Trial Not Allowed." That means applicants cannot propose a study that meets NIH's definition of a clinical trial, such as prospectively assigning participants to an intervention to evaluate effects on health-related outcomes. Instead, the ancillary work should generally involve mechanistic measurements, analyses, or observational approaches that complement the parent clinical project without introducing a new interventional clinical trial component. Examples in this general category often include laboratory analyses of biospecimens collected in the parent study, additional mechanistic biomarker testing, imaging or physiological assessments that do not constitute a trial, or analytic work that uses existing clinical data to test mechanistic hypotheses, as long as the work stays within the non-trial boundaries laid out by NIH.
The award ceiling listed for this opportunity is $250,000, reflecting the smaller-scale, targeted nature of an R21 ancillary study. The intent is to fund a discrete set of mechanistic aims that can be accomplished without the budget and scope of a full-scale research project grant. The original closing date shown in the source data is 2022-11-21, and the opportunity was created on 2020-10-22, indicating the announcement was active in that period and may have had multiple receipt dates or cycles depending on NIH policy at the time.
Eligibility is broad and includes many types of U.S.-based organizations and government entities. Eligible applicants include state, county, city or township governments, special district governments, and independent school districts, as well as public and state-controlled institutions of higher education and private institutions of higher education. Native American tribal governments that are federally recognized are eligible, along with public housing authorities and Indian housing authorities. Nonprofits are eligible whether or not they have 501(c)(3) status (as long as they are not institutions of higher education in the nonprofit category specified), and both for-profit organizations (other than small businesses) and small businesses are listed as eligible. The announcement also explicitly notes additional eligible applicants 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, regional organizations, eligible federal government agencies, and Indian/Native American tribal governments other than federally recognized tribes. U.S. territories or possessions are also included as eligible.
At the same time, there are important limits related to foreign involvement. Non-domestic (non-U.S.) entities, including foreign organizations and foreign institutions, are not eligible to apply as the applicant organization. In addition, non-domestic components of U.S. organizations are not eligible to apply. However, "foreign components" are allowed as defined in the NIH Grants Policy Statement, meaning a U.S. applicant may include certain types of foreign collaborations or activities if they meet NIH's definition and are appropriately justified and documented, even though the primary applicant must remain a domestic entity.
Overall, PAR-21-054 is best understood as a mechanism for adding mechanistic depth to existing clinical research by funding a limited, hypothesis-driven set of ancillary analyses or measurements that can capitalize on a parent study's participants, data, or specimen resources, while staying clearly outside the scope of proposing a new clinical trial.Apply for PAR 21 054
- The National Institutes of Health in the health sector is offering a public funding opportunity titled "Mechanistic Ancillary Studies to Ongoing Clinical Projects (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): 93.846.
- This funding opportunity was created on 2020-10-22.
- Applicants must submit their applications by 2022-11-21. (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 $250,000.00 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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Frequently Asked Questions (FAQs)
What is the purpose of NIH PAR-21-054?
PAR-21-054 supports short, focused ancillary research projects that add a mechanistic component to an ongoing clinical project. The goal is to help investigators use an existing clinical study, cohort, or infrastructure to answer deeper "how" and "why" biological, behavioral, or physiological questions that relate directly to the parent clinical work.
What is the official title of this funding opportunity?
The opportunity is titled "Mechanistic Ancillary Studies to Ongoing Clinical Projects (R21 Clinical Trial Not Allowed)" and the Funding Opportunity Number (FON) is PAR-21-054.
What NIH award mechanism is used for this opportunity?
This opportunity uses the NIH R21 mechanism, which is intended for exploratory and developmental research projects. In this context, it is specifically aimed at mechanistic ancillary studies that leverage an ongoing clinical project.
What does "ancillary study" mean in this opportunity?
An ancillary study is a project that is clearly tied to, and dependent on, an existing (parent) clinical project rather than a standalone, separate clinical endeavor. The ancillary work is designed to build on the parent study's participants, samples, data streams, or follow-up that are already in place.
What does "mechanistic" mean in the context of this R21?
Mechanistic means the proposed work is intended to explain underlying processes (for example, biological, physiological, behavioral, or other mechanisms) that relate to observations or outcomes in the ongoing clinical project. The emphasis is on understanding how and why, not simply describing what happens.
Do I need to have an ongoing clinical project to apply?
Yes. The concept described for this opportunity is that the proposed R21 should leverage access to an existing clinical project, cohort, or study infrastructure. The ancillary mechanistic study should be dependent on that ongoing clinical project.
Can the proposed project be a standalone new study?
No. The proposed ancillary study should not stand alone as a separate new clinical endeavor. It must be clearly connected to and reliant on the parent clinical project that is already underway.
Are clinical trials allowed under this opportunity?
No. The title explicitly states "Clinical Trial Not Allowed." Applicants cannot propose a study that meets NIH's definition of a clinical trial, such as prospectively assigning participants to an intervention to evaluate effects on health-related outcomes.
What types of activities are generally appropriate if clinical trials are not allowed?
The opportunity is intended for mechanistic measurements, analyses, or observational approaches that complement the parent clinical project without introducing a new interventional clinical trial component. Examples described include laboratory analyses of biospecimens collected in the parent study, additional mechanistic biomarker testing, imaging or physiological assessments that do not constitute a trial, and analytic work using existing clinical data to test mechanistic hypotheses (as long as it remains within NIH's non-trial boundaries).
What is the award ceiling for PAR-21-054?
The listed award ceiling is $250,000, consistent with the smaller-scale, targeted nature of an R21 ancillary study.
What is the overall intent of the budget and scope for this award?
The intent is to fund a discrete set of mechanistic aims that can be accomplished without the budget and scope of a full-scale research project grant, while still generating meaningful mechanistic insight tied to the parent clinical work.
What program area is this opportunity associated with?
The opportunity is categorized under Health.
What CFDA number is associated with this opportunity?
This opportunity is associated with CFDA number 93.846.
Who is eligible to apply?
Eligibility is broad and includes many U.S.-based organizations and government entities. 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, and private institutions of higher education.
Are tribal entities eligible to apply?
Yes. Federally recognized Native American tribal governments are eligible. The announcement also notes Indian/Native American tribal governments other than federally recognized tribes as eligible.
Are nonprofits eligible to apply?
Yes. Nonprofits are eligible whether or not they have 501(c)(3) status, as long as they are not in the specific nonprofit category described as "nonprofits other than institutions of higher education."
Are for-profit organizations eligible to apply?
Yes. For-profit organizations (other than small businesses) and small businesses are listed as eligible.
Are U.S. territories or possessions eligible to apply?
Yes. U.S. territories or possessions are included as eligible.
Are specific types of institutions explicitly called out as eligible?
Yes. The announcement explicitly notes eligibility for 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), and Tribally Controlled Colleges and Universities (TCCUs). It also notes faith-based or community-based organizations, regional organizations, eligible federal government agencies, public housing authorities, and Indian housing authorities.
Can a foreign organization apply as the applicant organization?
No. Non-domestic (non-U.S.) entities, including foreign organizations and foreign institutions, are not eligible to apply as the applicant organization.
Can a non-domestic component of a U.S. organization apply?
No. Non-domestic components of U.S. organizations are not eligible to apply.
Are any forms of foreign involvement allowed at all?
Yes. "Foreign components" are allowed as defined in the NIH Grants Policy Statement. That means a U.S. applicant may include certain foreign collaborations or activities if they meet NIH's definition and are appropriately justified and documented, even though the primary applicant must be a domestic entity.
How should the ancillary study relate to the parent clinical project?
The ancillary study should be clearly tied to and dependent on the ongoing clinical project. In practical terms, it should take advantage of existing participants, samples, data streams, or follow-up that are already being collected by the parent study.
What kind of research stage is the R21 meant to support here?
The R21 mechanism is typically used to support exploratory or developmental research, including early-stage or high-impact ideas that may require preliminary testing, proof-of-concept work, or specialized assays to establish feasibility and generate data that can justify a larger follow-on grant.
What is the original closing date shown for this opportunity?
The original closing date shown in the source data is 2022-11-21.
When was this opportunity created?
The opportunity was created on 2020-10-22.
Does the opportunity suggest it may have had multiple receipt dates or cycles?
Yes. The information provided indicates it was active during that period and may have had multiple receipt dates or cycles depending on NIH policy at the time.
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