Local concepts numerical space

[Vojtech_Huser (Vojtech (Vojta) Huser)]

At THEMIS meeting, Christian mentioned a range for local concepts (e.g., procedure_concept_id). Can you please point me to where this convention is documented (e.g., local concepts have IDs with 2000000000 and up).
I would expect it somewhere here

OHDSI/CommonDataModel

(if it is not clearly documented, please consider adding it to the specs)

[mpcardinal]

Hi,

The last bullet point under ‘Conventions’ gives you this information -
https://github.com/OHDSI/CommonDataModel/wiki/CONCEPT

Also, @bailey gives some good details around what to do when inserting a local concept in this post:

Protocol to add in-house concept_ids in v5

Hi - In our case, we've done what @Patrick_Ryan describes for one-off cases, but created local concepts for either 1) situations in which a particular value is mixed with standard values in the data (e.g. a custom lab result), and we want to be able to phrase queries against foo_concept_id for all cases, or 2) situations in which we want to record relationships among network-local concepts in concept_relationship so they're explicit in the database. Here's our checklist for new terms, in cas…

[Vojtech_Huser (Vojtech (Vojta) Huser)]

Thank you for reply. On a related note, it would be interesting to compare those codes (perhaps in the Heel output or the annual OHDSI Data Quality study).

Extract local codes and see if there is overlap)
(select * from concept where concept_id > 2000000000

Example of PEDSnet local codes are here:

[Christian_Reich]

@Vojtech_Huser: Why are these 2B Concepts? We have those PCORNet concepts in the normal space, where vocabulary_id=‘PCORNet’;