Children's Hospital of Philadelphia website screenshot

Children's Hospital of Philadelphia

Founded in 1855 as the first hospital in the United States dedicated to the healthcare of children, Children's Hospital of Philadelphia (CHOP) is a 692-bed flagship pediatric academic medical center affiliated with the University of Pennsylvania Perelman School of Medicine. CHOP records roughly 1.63 million outpatient visits and 34,829 admissions per year and operates one of the largest pediatric research enterprises in the world through its Research Institute and the Center for Data Driven Discovery in Biomedicine (D3b). From an API perspective, CHOP runs a production Epic-backed HL7 FHIR R4 endpoint at `https://epicnsproxy.chop.edu/fhir/api/FHIR/R4` exposing CMS-9115-F Patient Access and Provider Directory resources, US Core 6.1.0, SMART on FHIR, and HL7 Bulk Data. CHOP additionally publishes 320+ public repositories across the `chop-dbhi` (Department of Biomedical and Health Informatics) and `d3b-center` GitHub organizations, plus shared research data platforms including RADIANT, CAVATICA, PedcBioPortal, the Children's Brain Tumor Network, and the Kids First Data Resource Center.

5 APIs 5 Features
HealthcarePediatricsFHIRSMART On FHIRPatient AccessProvider DirectoryCMS InteroperabilityUS CoreBulk DataResearch DataOpen Data

APIs

CHOP FHIR R4 API

The Children's Hospital of Philadelphia FHIR Server. Epic (November 2025) on the back end, conforming to US Core 6.1.0 and the HL7 Bulk Data Access IG. Serves Patient Access (cl...

MyCHOP Patient Portal

MyChart-based patient portal that gives patients, parents and guardians access to virtual medical records, lab results, secure messaging, telehealth visits, medication refills, ...

Link2CHOP Referring Physician Portal

Internet-based portal for referring physician offices that provides real-time, read-only access to the CHOP Epic EMR. Surfaces discharge notes, operative reports, progress notes...

D3b Data Sharing Platforms

The Center for Data Driven Discovery in Biomedicine (D3b) at CHOP operates the open research data infrastructure for pediatric cancer and rare disease. Programs include RADIANT ...

DBHi Biomedical and Health Informatics

CHOP's Department of Biomedical and Health Informatics (DBHi) maintains 168 public repositories covering health data infrastructure, EHR integration, and SMART on FHIR tools. No...

Collections

Children's Hospital of Philadelphia FHIR R4 API

OPEN

Features

CMS-Compliant Patient Access FHIR API

HL7 FHIR R4 server with US Core 6.1.0 conformance and SMART on FHIR authorization, fulfilling CMS-9115-F Patient Access requirements.

Public Provider Directory

Unauthenticated FHIR resources for Practitioner, PractitionerRole, Organization, Location, and Endpoint.

HL7 Bulk Data Access

Group-level $export per the HL7 Bulk Data IG; supports backend services (client_credentials) authentication.

59 FHIR Resource Types

Capability statement advertises 59 resource types covering clinical, administrative, and financial data, including AllergyIntolerance, Condition, Observation, MedicationRequest, Immunization, Procedure, Encounter, DiagnosticReport, DocumentReference, Coverage, ExplanationOfBenefit, and Claim.

Open-Source Health Informatics Tools

168 public DBHi repositories and 153 public D3b repositories spanning ETL, anonymization, biorepository analytics, and SMART apps.

Use Cases

Patient-Mediated Data Download

Parents and guardians download their child's full clinical and claims history into third-party PHR apps via SMART on FHIR.

Care-Coordination Apps

Approved EHR-launched and standalone SMART apps surface CHOP data inside referring-provider and care-coordination tools.

Population Analytics

Approved system-level clients run Group-level $export to extract de-identified cohorts for research and quality measurement.

Pediatric Cancer Research Collaboration

D3b platforms (RADIANT, CAVATICA, PedcBioPortal, CBTN) enable multi-site sharing of pediatric oncology and rare-disease data.

Referring Provider Read-Only EMR Access

Link2CHOP gives credentialed referring physicians live access to discharge notes, labs, imaging, medications, and diagnoses for shared patients.

Integrations

Epic EHR

CHOP's underlying EHR; the FHIR endpoint is served by Epic November 2025.

Epic on FHIR

Third-party app developers register apps at fhir.epic.com and target CHOP (Organization ID 332).

SMART App Launch

SMART on FHIR launch protocols for EHR-integrated and standalone apps.

HL7 FHIR Bulk Data IG

Backend-services authentication and Group-level export.

HL7 US Core 6.1.0

CapabilityStatement instantiates us-core-server profile.

ARPA-H

Funding partner for the RADIANT pediatric data-sharing platform.

NIH Common Fund

Funds the Gabriella Miller Kids First Data Resource Center, coordinated by D3b.

University of Pennsylvania

Academic affiliate (Perelman School of Medicine).

Solutions

Patient Access

CMS-mandated patient-mediated data access surface.

Provider Directory

CMS-mandated public provider directory surface.

Bulk Data Analytics

Population-scale data extraction for approved partners.

Open Research Data

D3b platforms for pediatric cancer and rare-disease research collaboration.

Semantic Vocabularies

Childrens Hospital Of Philadelphia Context

22 classes · 0 properties

JSON-LD

API Governance Rules

Children's Hospital of Philadelphia API Rules

4 rules · 2 errors 2 warnings

SPECTRAL

Example Payloads

Chop Fhir Bulk Export Example

5 fields

EXAMPLE

Chop Fhir Observation Example

9 fields

EXAMPLE

Chop Fhir Organization Example

10 fields

EXAMPLE

Chop Fhir Patient Example

11 fields

EXAMPLE

Chop Fhir Practitioner Example

8 fields

EXAMPLE

Resources

🌐
Portal
Portal
🌐
DeveloperPortal
DeveloperPortal
👥
GitHubOrganization
GitHubOrganization
👥
GitHubOrganization
GitHubOrganization
📰
Blog
Blog
📜
PrivacyPolicy
PrivacyPolicy
📜
TermsOfService
TermsOfService
🔗
Compliance
Compliance
💬
Support
Support
🔗
SpectralRules
SpectralRules
🔗
JSONLD
JSONLD
🔗
Vocabulary
Vocabulary

Sources

Raw ↑ 
opencollection: 1.0.0
info:
  name: Children's Hospital of Philadelphia FHIR R4 API
  version: 4.0.1
request:
  auth:
    type: oauth2
    flow: client_credentials
    accessTokenUrl: https://epicnsproxy.chop.edu/fhir/oauth2/token
    credentials:
      clientId: '{{clientId}}'
      clientSecret: '{{clientSecret}}'
items:
- info:
    name: SMART
    type: folder
  items:
  - info:
      name: Read Capability Statement
      type: http
    http:
      method: GET
      url: https://epicnsproxy.chop.edu/fhir/api/FHIR/R4/metadata
    docs: Returns the FHIR CapabilityStatement describing supported resources, interactions, and security.
  - info:
      name: Read SMART Configuration
      type: http
    http:
      method: GET
      url: https://epicnsproxy.chop.edu/fhir/api/FHIR/R4/.well-known/smart-configuration
    docs: SMART on FHIR discovery document advertising OAuth endpoints, scopes, and capabilities.
- info:
    name: Patient Access
    type: folder
  items:
  - info:
      name: Read Patient
      type: http
    http:
      method: GET
      url: https://epicnsproxy.chop.edu/fhir/api/FHIR/R4/Patient/:id
      params:
      - name: id
        value: ''
        type: path
    docs: Read Patient
  - info:
      name: Search Patient
      type: http
    http:
      method: GET
      url: https://epicnsproxy.chop.edu/fhir/api/FHIR/R4/Patient
      params:
      - name: _id
        value: ''
        type: query
      - name: _count
        value: ''
        type: query
    docs: Search Patient
  - info:
      name: Search Allergy Intolerance
      type: http
    http:
      method: GET
      url: https://epicnsproxy.chop.edu/fhir/api/FHIR/R4/AllergyIntolerance
      params:
      - name: patient
        value: ''
        type: query
    docs: Search Allergy Intolerance
  - info:
      name: Search Condition
      type: http
    http:
      method: GET
      url: https://epicnsproxy.chop.edu/fhir/api/FHIR/R4/Condition
      params:
      - name: patient
        value: ''
        type: query
      - name: category
        value: ''
        type: query
    docs: Search Condition
  - info:
      name: Search Observation
      type: http
    http:
      method: GET
      url: https://epicnsproxy.chop.edu/fhir/api/FHIR/R4/Observation
      params:
      - name: patient
        value: ''
        type: query
      - name: category
        value: ''
        type: query
      - name: code
        value: ''
        type: query
    docs: Search Observation
  - info:
      name: Search Medication Request
      type: http
    http:
      method: GET
      url: https://epicnsproxy.chop.edu/fhir/api/FHIR/R4/MedicationRequest
      params:
      - name: patient
        value: ''
        type: query
    docs: Search Medication Request
  - info:
      name: Search Immunization
      type: http
    http:
      method: GET
      url: https://epicnsproxy.chop.edu/fhir/api/FHIR/R4/Immunization
      params:
      - name: patient
        value: ''
        type: query
    docs: Search Immunization
  - info:
      name: Search Procedure
      type: http
    http:
      method: GET
      url: https://epicnsproxy.chop.edu/fhir/api/FHIR/R4/Procedure
      params:
      - name: patient
        value: ''
        type: query
    docs: Search Procedure
  - info:
      name: Search Encounter
      type: http
    http:
      method: GET
      url: https://epicnsproxy.chop.edu/fhir/api/FHIR/R4/Encounter
      params:
      - name: patient
        value: ''
        type: query
    docs: Search Encounter
  - info:
      name: Search Diagnostic Report
      type: http
    http:
      method: GET
      url: https://epicnsproxy.chop.edu/fhir/api/FHIR/R4/DiagnosticReport
      params:
      - name: patient
        value: ''
        type: query
      - name: category
        value: ''
        type: query
    docs: Search Diagnostic Report
  - info:
      name: Search Document Reference
      type: http
    http:
      method: GET
      url: https://epicnsproxy.chop.edu/fhir/api/FHIR/R4/DocumentReference
      params:
      - name: patient
        value: ''
        type: query
    docs: Search Document Reference
  - info:
      name: Search Coverage
      type: http
    http:
      method: GET
      url: https://epicnsproxy.chop.edu/fhir/api/FHIR/R4/Coverage
      params:
      - name: patient
        value: ''
        type: query
    docs: Search Coverage
  - info:
      name: Search Explanation of Benefit
      type: http
    http:
      method: GET
      url: https://epicnsproxy.chop.edu/fhir/api/FHIR/R4/ExplanationOfBenefit
      params:
      - name: patient
        value: ''
        type: query
    docs: Search Explanation of Benefit
  - info:
      name: Search Claim
      type: http
    http:
      method: GET
      url: https://epicnsproxy.chop.edu/fhir/api/FHIR/R4/Claim
      params:
      - name: patient
        value: ''
        type: query
    docs: Search Claim
- info:
    name: Provider Directory
    type: folder
  items:
  - info:
      name: Search Practitioner
      type: http
    http:
      method: GET
      url: https://epicnsproxy.chop.edu/fhir/api/FHIR/R4/Practitioner
      params:
      - name: _id
        value: ''
        type: query
      - name: name
        value: ''
        type: query
    docs: Search Practitioner
  - info:
      name: Search Practitioner Role
      type: http
    http:
      method: GET
      url: https://epicnsproxy.chop.edu/fhir/api/FHIR/R4/PractitionerRole
      params:
      - name: _id
        value: ''
        type: query
      - name: specialty
        value: ''
        type: query
    docs: Search Practitioner Role
  - info:
      name: Search Organization
      type: http
    http:
      method: GET
      url: https://epicnsproxy.chop.edu/fhir/api/FHIR/R4/Organization
      params:
      - name: _id
        value: ''
        type: query
      - name: name
        value: ''
        type: query
    docs: Search Organization
  - info:
      name: Search Location
      type: http
    http:
      method: GET
      url: https://epicnsproxy.chop.edu/fhir/api/FHIR/R4/Location
      params:
      - name: _id
        value: ''
        type: query
      - name: address
        value: ''
        type: query
    docs: Search Location
  - info:
      name: Search Endpoint
      type: http
    http:
      method: GET
      url: https://epicnsproxy.chop.edu/fhir/api/FHIR/R4/Endpoint
      params:
      - name: _id
        value: ''
        type: query
    docs: Search Endpoint
- info:
    name: Bulk Data
    type: folder
  items:
  - info:
      name: Export Group Bulk Data
      type: http
    http:
      method: GET
      url: https://epicnsproxy.chop.edu/fhir/api/FHIR/R4/Group/:id/$export
      params:
      - name: id
        value: ''
        type: path
      - name: _type
        value: ''
        type: query
    docs: 'Initiates a Bulk Data (Flat FHIR) export for a Group of patients per

      HL7 FHIR Bulk Data Access IG. Requires client_credentials authentication and the

      `system/*.read` scope. Status is polled at the Content-Location URL.

      '
bundled: true