---
title: "GET /concept_relationship"
method: GET
path: "/concept_relationship"
tags: ["concept_relationshipController"]
---

# GET /concept_relationship

`GET /concept_relationship`

## Response `200`

Array of concept_relationship instances

- ConceptRelationshipWithRelations[]
  - `concept_id_1` number
  - `concept_id_2` number
  - `relationship_id` string
  - `valid_start_date` string, date-time
  - `valid_end_date` string, date-time
  - `invalid_reason` string

## Changes

- **2022-12-15** `17f92620449e` — 1 info
  - endpoint added
- **2022-11-28** `8517ac9eef50` — 1 breaking
  - api path removed without deprecation

[Change history](https://skmtc.dev/ohdsi/apis/data-connection/changes/concept_relationship/get.md)

---

[API](https://skmtc.dev/ohdsi/apis/data-connection.md) · [All operations](https://skmtc.dev/ohdsi/apis/data-connection/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/ohdsi/data-connection/revisions/b5ead99a1d44/schema)