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Terms of Usage for PacificSource APIs 

In support of CMS Interoperability requirements, PacificSource supports third-party developer access to public and patient access API endpoints.   

Note that any access or usage of PacificSource APIs requires and implies consent with PacificSource API Usage Terms and Conditions

PacificSource may block or revoke access to its API resources at any time in the event that it perceives that member PHI may be at risk or that a violation of the Usage Terms and Conditions has occurred. 


Getting started with PacificSource APIs 

PacificSource interoperability APIs follow HL7 FHIR specifications. The version of FHIR currently supported by PacificSource APIs is 4.01.   

Learn how to search FHIR resources

More detailed informatio, including data specification and code examples for each of the FHIR resources made available by PacificSource may be found at the links below: 

Resource Type
FHIR Specification


Patient - FHIR v4.0.1 ( 


Coverage - FHIR v4.0.1 ( 


Practitioner - FHIR v4.0.1 ( 

Organization - FHIR v4.0.1 ( 

HealthcareService - FHIR v4.0.1 ( 

Claim/Explanation of Benefit 

ExplanationOfBenefit - FHIR v4.0.1 ( 


Medication - FHIR v4.0.1 ( 

MedicationKnowledge - FHIR v4.0.1 ( 

FormularyItem - FHIR v5.0.0 ( 


PacificSource public access APIs for provider and formulary data 

PacificSource supports open access to provider and formulary data at the following URI: 

The OpenAPI specification for PacificSource provider and formularly API endpoints may be found here: 


PacificSource patient access APIs 

PacificSource also supports appropriate developer access to APIs for member PHI at the following URL: 

Developers wishing to access the PacificSource Patient Access API must register in advance to obtain an API key.   

For more information, please email

The OpenAPI specification for PacificSource Patient Access API endpoints may be found here: