---
title: "GET /observation_period"
method: GET
path: "/observation_period"
tags: ["observation_periodController"]
---

# GET /observation_period

`GET /observation_period`

## Response `200`

Array of observation_period instances

- ObservationPeriodWithRelations[]
  - `observation_period_id` number
  - `person_id` number
  - `observation_period_start_date` string, date-time
  - `observation_period_end_date` string, date-time
  - `period_type_concept_id` number

## 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/observation_period/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)