OHDSI/CommonDataModel

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Definition and DDLs for the OMOP Common Data Model (CDM)

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Indexed issues: 74
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Last GitHub push: Aug 25, 2026
Latest indexed: Sep 19, 2026
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74 open issues indexed

Clarification on OMOP CDM versioning standards Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

OHDSI/CommonDataModel#811 · Opened Sep 4, 2026
Lots of broken links in the episode table docs Open

Difficulty 1/5 Under an hour Newbie friendliness 74/100

OHDSI/CommonDataModel#802 · 1 comment · Opened Aug 13, 2026
check marks and Xs on front page, tooling support section, need to be updated, right now they look like r code Open

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

OHDSI/CommonDataModel#799 · Opened Jul 30, 2026
Changes to quarto docs Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

OHDSI/CommonDataModel#797 · 1 comment · Opened Jul 29, 2026
fix: mark cohort_definition_id as primary key in cohort_definition table for v5.3 and v5.4 Open

Difficulty 2/5 1-3 hours Newbie friendliness 82/100

OHDSI/CommonDataModel#787 · Opened Jun 19, 2026
drug_concept_id - "... ETL to provide as much information as possible from the data" - where to cut off validity? Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

OHDSI/CommonDataModel#785 · 1 comment · Opened May 5, 2026
Table PERSON vs EPISODE) foreign key columns to match exactly Open

Difficulty 2/5 1-3 hours Newbie friendliness 65/100

OHDSI/CommonDataModel#784 · Opened Apr 18, 2026
Add Databricks DDL for OMOP CDM v5.4 Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

OHDSI/CommonDataModel#781 · 1 comment · 2 reactions · Opened Mar 26, 2026
Field `cohort_definition_id` in table `cohort_definition` should be a primary key. Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

OHDSI/CommonDataModel#772 · 1 reaction · Opened Feb 9, 2026
Constraints for table `concept_relationship` (primary key and maybe coherence of start and end dates) Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

OHDSI/CommonDataModel#771 · Opened Feb 9, 2026
Missing primary key for table `death`? Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

OHDSI/CommonDataModel#770 · Opened Feb 8, 2026
remove this file Open

Difficulty 1/5 Under an hour Newbie friendliness 45/100

OHDSI/CommonDataModel#763 · Opened Nov 14, 2025
Drug era calculation gap_days calculation Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

OHDSI/CommonDataModel#761 · 2 comments · Opened Oct 27, 2025
Add suggested "ETL Helper Columns" to the CDM website Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

OHDSI/CommonDataModel#760 · 2 comments · Opened Oct 9, 2025
'Required' terminology Open

Documentation

Difficulty 3/5 1-2 days Newbie friendliness 35/100

OHDSI/CommonDataModel#757 · 3 comments · Opened Sep 1, 2025
Biobank data into OMOP CDM Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

OHDSI/CommonDataModel#756 · 3 comments · Opened Aug 27, 2025
What to put in the Metadata table? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

OHDSI/CommonDataModel#755 · 1 comment · Opened Aug 19, 2025
Forum link on Ask a Question page is dead Open

Bug

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

OHDSI/CommonDataModel#754 · 1 comment · Opened Aug 15, 2025
Adding value_source_concept_concept_id field to the Measurement and Observation table Open

2025 Symposium Proposal

Difficulty 5/5 Over a week Newbie friendliness 20/100

OHDSI/CommonDataModel#751 · 1 comment · Opened Jul 28, 2025
Unite measurement into observation (or observation into measurement) Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

OHDSI/CommonDataModel#750 · 1 comment · Opened Jul 25, 2025
Death table PK Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

OHDSI/CommonDataModel#741 · 1 comment · Opened Apr 10, 2025
Missing verbiage from CDM specification v5.4 Care Site table Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

OHDSI/CommonDataModel#740 · Opened Apr 8, 2025
Start maintaining tables that are not fully standardized Open

Documentation

Difficulty 5/5 Over a week Newbie friendliness 25/100

OHDSI/CommonDataModel#737 · 1 comment · Opened Mar 28, 2025
Move away from arbitrary heuristic concept domain assignment model to an extensible cascading ruleset Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

OHDSI/CommonDataModel#734 · 1 comment · Opened Mar 11, 2025
Remove DEA and NPI from PROVIDER table Open

Major Change Proposal

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

OHDSI/CommonDataModel#732 · 3 comments · Opened Mar 5, 2025
Update OHDSI tooling page with all tables and fields Open

Documentation

Difficulty 3/5 1-2 days Newbie friendliness 45/100

OHDSI/CommonDataModel#731 · Opened Mar 5, 2025
Add WIDE_MAPPING table Open

Minor Change Proposal

Difficulty 5/5 Over a week Newbie friendliness 20/100

OHDSI/CommonDataModel#728 · 1 reaction · Opened Feb 18, 2025
Drop table SOURCE_TO_CONCEPT_MAP Open

Major Change Proposal

Difficulty 4/5 3-5 days Newbie friendliness 35/100

OHDSI/CommonDataModel#727 · 3 comments · Opened Feb 15, 2025
Drop table COHORT_DEFINITION Open

Major Change Proposal

Difficulty 3/5 1-2 days Newbie friendliness 35/100

OHDSI/CommonDataModel#725 · 3 comments · Opened Feb 14, 2025
Field note_nlp."offset" should be integer, not varchar Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

OHDSI/CommonDataModel#723 · Opened Jan 30, 2025
errors in inst/csv/OMOP_CDMv6.0_Field_Level.csv Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

OHDSI/CommonDataModel#722 · 3 comments · Opened Jan 8, 2025
Update documentation: remove misleading info on dose_era Open

Difficulty 1/5 Under an hour Newbie friendliness 45/100

OHDSI/CommonDataModel#721 · Opened Dec 10, 2024
swift data and healthkit (apple) omop cmd compatible Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

OHDSI/CommonDataModel#720 · 1 comment · Opened Nov 19, 2024
Support for Python Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

OHDSI/CommonDataModel#715 · 2 comments · Opened Sep 18, 2024
The PAYER_PLAN_PERIOD_ID column of the COST table should have a foreign key to the PAYER_PLAN_PERIOD table. Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

OHDSI/CommonDataModel#714 · 1 comment · Opened Sep 18, 2024
FK Constraints in DuckDB Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

OHDSI/CommonDataModel#713 · Opened Sep 13, 2024
Determine which items from v6.0 are potentially valid for v5-series Open

OHDSI/CommonDataModel#710 · 1 comment · 1 assignee · Opened Sep 3, 2024
How to Calculate Drug Dose page; definition of Drug_Exposure quantity field Open

Drug Dose Discussion

Difficulty 1/5 Under an hour Newbie friendliness 25/100

OHDSI/CommonDataModel#709 · 16 comments · Opened Aug 26, 2024
Drug quantity convention example Open

Drug Dose Discussion

Difficulty 3/5 1-2 days Newbie friendliness 42/100

OHDSI/CommonDataModel#708 · 3 comments · Opened Aug 26, 2024
unresolvable fk cycles between concept and concept_class Open

Question

Difficulty 4/5 3-5 days Newbie friendliness 35/100

OHDSI/CommonDataModel#706 · 3 comments · 1 reaction · Opened Aug 7, 2024
Instructions for using sqlite DDLs for non-R users Open

Bug Community Contribution

Difficulty 4/5 3-5 days Newbie friendliness 35/100

OHDSI/CommonDataModel#693 · 4 comments · 5 reactions · Opened May 28, 2024
drug dose update Open

Drug Dose Discussion

Difficulty 4/5 3-5 days Newbie friendliness 25/100

OHDSI/CommonDataModel#691 · 2 comments · Opened May 22, 2024
Create model for dissecting the sig field into computable structured data Open

Drug Dose Discussion

Difficulty 5/5 Over a week Newbie friendliness 25/100

OHDSI/CommonDataModel#689 · 14 comments · Opened May 11, 2024
Convention for patients "still in hospital" Open

Proposal

OHDSI/CommonDataModel#698 · 5 comments · 1 assignee · Opened Apr 25, 2024
Is DEVICE_EXPOSURE.unique_device_id only related to the devices regulated by the FDA? Open

Proposal

OHDSI/CommonDataModel#677 · 5 comments · 1 assignee · Opened Apr 22, 2024
CDM Source Open

General Convention

Difficulty 2/5 1-3 hours Newbie friendliness 25/100

OHDSI/CommonDataModel#674 · 5 comments · Opened Apr 19, 2024
How to store family history in the OBSERVATION table Open

Documentation

OHDSI/CommonDataModel#656 · 4 comments · 1 assignee · Opened Apr 16, 2024
Clarity on the definition of "Case management visit" in the CDM documentation Open

Documentation

OHDSI/CommonDataModel#648 · 3 comments · 1 assignee · Opened Apr 12, 2024
How to store the reason of drug discontinuation in DRUG_EXPOSURE.stop_reason field Open

OHDSI/CommonDataModel#644 · 2 comments · 1 assignee · Opened Apr 11, 2024
ERD image is not correct. concept_synonym table only has three rows. not 7 as ERD digram suggests Open

Bug

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

OHDSI/CommonDataModel#619 · 2 comments · Opened Feb 16, 2024

OHDSI/CommonDataModel

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