---
title: "Specialty History"
canonical: "https://wiki.patientsknowbest.com/space/api/3364847805/Specialty%20History"
format: markdown
---
[http://fhir.patientsknowbest.com/structuredefinition/specialty-history](http://fhir.patientsknowbest.com/structuredefinition/specialty-history)

[https://www.hl7.org/fhir/STU3/structuredefinition.html](https://www.hl7.org/fhir/STU3/structuredefinition.html)

## description

This extension contains the value of [[[Data Point.Specialty]]](https://pkbdev.atlassian.net/wiki/spaces/api/pages/3363700789/Data+Model#Data-Point) across different time periods.

The specialty will be returned as a Coding in a subextension called “specialty”, and the time period will be returned as a Period in a subextension called “period”.

## context

This extension is used by the following resources:

- [Encounter](http://fhir.patientsknowbest.com/structuredefinition/facade-encounter)

## type

Extension

## element type

- specialty: Coding
- period: Period