CharmHealth Observation API

openapi: 3.1.0
info:
  title: CharmHealth FHIR AllergyIntolerance Observation API
  description: HL7 FHIR R4 (4.0.1) REST API exposed by CharmHealth EHR conforming to the US Core 3.1.1 Implementation Guide. Supports SMART on FHIR authorization for patient-facing apps, provider-facing apps, and backend services. Resource paths follow FHIR conventions and accept standard FHIR search parameters.
  version: 4.0.1
  contact:
    name: CharmHealth Developer Support
    url: https://www.charmhealth.com/support/
servers:
- url: https://ehr2.charmtracker.com/api/ehr/v2/fhir
  description: CharmHealth FHIR Production
security:
- smartOnFhir: []
tags:
- name: Observation
  description: Vital signs, lab results, and clinical observations
paths:
  /Observation:
    get:
      operationId: searchObservation
      summary: Search Observation
      tags:
      - Observation
      parameters:
      - name: patient
        in: query
        schema:
          type: string
      - name: category
        in: query
        schema:
          type: string
      - name: code
        in: query
        schema:
          type: string
      - name: date
        in: query
        schema:
          type: string
      responses:
        '200':
          description: Observation Bundle
components:
  securitySchemes:
    smartOnFhir:
      type: oauth2
      description: SMART on FHIR authorization with patient/, user/, and system/ scopes.
      flows:
        authorizationCode:
          authorizationUrl: https://ehr2.charmtracker.com/oauth/v2/auth
          tokenUrl: https://ehr2.charmtracker.com/oauth/v2/token
          scopes:
            launch/patient: Patient context launch
            patient/Patient.read: Read patient demographic data
            patient/Observation.read: Read observations
            patient/Condition.read: Read conditions
            patient/MedicationRequest.read: Read medication orders
            user/*.read: Read all user-accessible resources
        clientCredentials:
          tokenUrl: https://ehr2.charmtracker.com/oauth/v2/token
          scopes:
            system/*.read: Backend services read access
externalDocs:
  description: CharmHealth FHIR API Documentation
  url: https://www.charmhealth.com/resources/fhir/index.html