OpenSpecimen allows users to add existing participants to another protocol. You can use any of the below fields to uniquely identify a participant:

  1. eMPI

  2. MRN + MRN site

  3. SSN.

PPID is de-identified patient identifier within a collection protocol, and thus it does not uniquely identify a participant across the system.

E.g., Register a participant having eMPI ‘110231’ (already present in CP ‘Skin Cancer Study’) to another CP ‘Lung Cancer Research Study1’.

Steps:

CP1 Registration:

CP2 Registration: