Activity Codes

NIH uses three-character activity codes to differentiate the wide variety of research-related programs NIH supports. The first character typically identifies the major funding category or program type. For example, activity codes for research and development often start with "R," training with "T," fellowship with "F," and career development with "K." Each institute and center (IC) participates in a subset of activity codes. Although each activity code has a broadly defined purpose, there may be differences in their use from one IC to another. Applicants should always refer to the funding opportunity for the specific requirements and details of an initiative.

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Activity Code ▼ Funding Category Title Description
PL1 Research and Development Linked Center Core Grant To support shared resources and facilities for categorical research by a number of investigators from different disciplines who provide a multidisciplinary approach to a joint research effort or from the same discipline who focus on a common research problem. The core grant is integrated with the center's component projects or program projects, though funded independently from them. This support, by providing more accessible resources, is expected to assure a greater productivity than from the separate projects and program projects. The Linked Center Core Grant is administratively linked to another project or projects. A PL1 award may only be disaggregated from a U54 application and organizations may not apply for a PL1, Linked Center Core Grant. The PL1 is used in lieu of the P30 for those programs that offer linked awards.
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