Multiple accession number prefixes for anatomic pathology (surgical vs cytology, multi-site)

Hello everyone,

I’m implementing OpenELIS Global v3.2.1 for an anatomic pathology lab in Syria, two sites (Homs and Idlib) running surgical pathology, cytology, and IHC on a single shared instance.

I have a question about accession number prefixes. In our configuration file (SystemConfiguration.properties), I see three related settings:

  • ACCESSION_NUMBER_PREFIX
  • ALT_ACCESSION_PREFIX / USE_ALT_ACCESSION_PREFIX
  • ALPHANUM_ACCESSION_PREFIX / USE_ALPHANUM_ACCESSION_PREFIX

Our pathologists would ideally like different prefixes per specimen type, for example S2026-001 for surgical cases and C2026-001 for cytology. Even better would be site-specific prefixes like HS (Homs Surgical), HC (Homs Cytology), etc.

My questions:

  1. How does ALT_ACCESSION_PREFIX work? how does it interact with the primary prefix? is it selected automatically based on sample type, or manually by the user during order entry?

  2. Is there any way to configure more than two prefixes within a single instance?

  3. For those running multi-site anatomic pathology labs on a single instance, how do you handle accession numbering? Do you use a single prefix and rely on lab unit metadata to distinguish site origin?

  4. If we add another site later, can we also add more prefixes to them?

Currently I’m planning to use a single prefix (AP) with lab units for site differentiation, but wanted to check if there’s a better approach before we go live with real cases.

Thank you for any guidance!