Independence Blue Cross (IBX) is the Blue Cross Blue Shield Association licensee for southeastern Pennsylvania (Bucks, Chester, Delaware, Montgomery, and Philadelphia counties) and a subsidiary of Independence Health Group, Inc., the 2013 holding company that also owns the AmeriHealth commercial brands (including AmeriHealth New Jersey and AmeriHealth Administrators TPA) and majority-owns the AmeriHealth Caritas family of Medicaid managed-care plans. IBX has called Philadelphia home for more than 85 years, serves nearly three million members directly, and — through Independence Health Group — supports roughly nine million covered lives across commercial, Medicare Advantage, Medicaid, CHIP, dental, vision, and behavioral health lines of business. Independence Health Group reported consolidated revenue of $36.3 billion for 2025.
To satisfy the CMS Interoperability and Patient Access final rule (CMS-9115-F), Independence Blue Cross publishes three HL7 FHIR R4 (4.0.1) APIs from a single shared gateway at https://eapics.ibx.com, documented through the developer portal at https://devportal.ibx.com/.
| API | Base URL | Auth | Implementation Guide |
|---|---|---|---|
| Patient Access FHIR API | https://eapics.ibx.com/patient/v1/fhir |
SMART on FHIR / OAuth 2.0 with PKCE | US Core 3.1.1, CARIN BB, Da Vinci PDex |
| Provider Directory FHIR API | https://eapics.ibx.com/provider/v1/fhir |
None (public) | Da Vinci PDex Plan-Net |
| Drug Formulary FHIR API | https://eapics.ibx.com/formulary/v1/fhir |
None (public) | Da Vinci US Drug Formulary (USDF) |
| Transparency in Coverage MRFs | https://www.ibx.com/cmstic/?brand={khpe|qcc|iac} |
None (public bulk download) | 45 CFR Part 147.211 |
Population scope for the Patient Access API per the developer portal: Independence Medicare Advantage (MA) and Keystone HMO Children's Health Insurance Program (CHIP) members. Commercial / group populations are out of scope on this surface; Medicaid populations served by the AmeriHealth Caritas family of plans live on the separate developer.amerihealthcaritas.com portal.
authorization_endpoint https://member.ibx.com/patientaccesssvc/oauth2/v1/authorize
token_endpoint https://eapics.ibx.com/oauth2/v2/token
well-known https://eapics.ibx.com/patient/v1/fhir/.well-known/smart-configuration
Advertised SMART capabilities: client-public, sso-openid-connect, launch-standalone, client-confidential-symmetric, context-standalone-patient, permission-offline, permission-patient.
| Folder | Contents |
|---|---|
apis.yml |
APIs.json 0.19 index for IBX |
openapi/ |
OpenAPI 3.0 specs split out of the published cmsSwagger.json (Patient / Provider / Formulary) |
capabilities/ |
Naftiko capability YAMLs (Patient Access, Claims & EOB, Provider Directory, Medications & Formulary) |
rules/ |
Spectral-style operational rules for the IBX FHIR APIs |
json-schema/ |
JSON Schema for key FHIR resources (Patient, Coverage, EOB, Practitioner, Organization, Location) |
json-structure/ |
JSON Structure describing IBX corporate / health-plan organization |
json-ld/ |
JSON-LD context aligning IBX entities with schema.org and the FHIR IGs |
examples/ |
Sample request/response payloads (Patient, Coverage, EOB, Practitioner, Organization, MedicationKnowledge) |
vocabulary/ |
Operational vocabulary mapping IBX concepts, services, tools, standards |
plans/ |
API Commons Plans 0.1 (the IBX FHIR APIs are free / regulatory-mandated) |
rate-limits/ |
API Commons Rate Limits 0.1 (no public numeric limits; reasonable-use posture) |
finops/ |
FOCUS-aligned FinOps file (no vendor invoice for API access) |
- Portal: https://devportal.ibx.com/
- Documentation (CMS Interoperability hub): https://devportal.ibx.com/documentation/
- Public Swagger / OpenAPI source: https://www.ibx.com/scripts/custom/swagger/cmsSwagger.json
- Registration: https://devportal.ibx.com/cmssignin/
- Terms & Conditions: https://www.ibx.com/htdocs/custom/tnc/Developer%20Portal%20TandC.pdf
- App onboarding support: AppOnboardingSupport@ibx.com
- Parent: Independence Health Group, Inc. (2013 holding company)
- Sibling subsidiaries: AmeriHealth (commercial), AmeriHealth Administrators (national TPA), AmeriHealth Insurance Company of New Jersey (commercial PPO/HMO, ~209,000 NJ members), AmeriHealth Caritas (Medicaid managed care; Independence Health Group 61.3% / Blue Cross Blue Shield of Michigan 38.7%), Tandigm Health (value-based primary care enablement)
- Underwriting carrier brands publishing Transparency in Coverage files: Keystone Health Plan East, QCC Insurance Company, Independence Assurance Co, Inc.
- No public GitHub organization for IBX's developer surface — SDKs, sample code, and Postman collections are distributed through the dev portal rather than open-source repositories.
- No published numeric rate limits for any of the three FHIR APIs; consume them with exponential backoff and aggressive caching for the public Provider Directory / Formulary surfaces.
- The dev portal is a single-page Angular app (
devportal.ibx.com/documentation/); deep links into per-API documentation pages are rendered client-side and are not directly fetchable by simple HTTP clients. The publishedcmsSwagger.jsonis the most reliable source of truth for paths, auth, and contact details.
HL7 FHIR R4 (4.0.1) · SMART App Launch 1.0.0 · US Core 3.1.1 · CARIN Blue Button · CPCDS · Da Vinci PDex · Da Vinci PDex Plan-Net · Da Vinci US Drug Formulary (USDF) · USCDI v1 · CMS Interoperability and Patient Access Final Rule (CMS-9115-F)