CARIN Consumer Directed Payer Data Exchange (CARIN IG for Blue Button®)
1.2.0 - STU 2 Ballot

CARIN Consumer Directed Payer Data Exchange (CARIN IG for Blue Button®), published by HL7 Financial Management Working Group. This is not an authorized publication; it is the continuous build for version 1.2.0). This version is based on the current content of and changes regularly. See the Directory of published versions

Security and Privacy Considerations

General Considerations

The CARIN Consumer-Directed Payer Data Exchange involves a patient’s claim and encounter information communicated through a member directed exchange. This data includes the Protected Health Information (PHI), Personally Identifiable Information (PII), and personal financial data. Members need to be able to direct the communication of this information through authenticated, authorized, and secure channels.

Exchange of this information needs to be protected with proper security and privacy protections to avoid malicious or unintentional exposure of such information. All consumer-directed payer data exchanges must be appropriately secured in transit and access limited only to authorized individuals.

Implementers must ensure that APIs fully and successfully implement privacy and security features such as, but not limited to, those required to comply with HIPAA privacy and security requirements and other applicable law protecting the privacy and security of protected health information. Note that the HIPAA Privacy Rule applies only to HIPAA covered entities. The HIPAA Privacy Rule applies to HIPAA covered entities. After information leave the control of a HIPAA covered entity, the HIPAA Privacy Rule does not apply. FTC consumer protection laws and state privacy laws may apply.

Security Considerations and Guidance

All implementers of the CARIN Consumer-Directed Payer Data Exchange Implementation Guide (IG) should follow the FHIR Security guidance, Security and Privacy Module, and the FHIR Implementer’s Safety Checklist guidance as defined in the FHIR standard where applicable and not otherwise superseded by this section of the IG.

  1. The FHIR Security specification provides guidance related to communication security, authentication, authorization/access control, audit, digital signatures, attachments, labels, narrative, and input validation. The FHIR security specification is available here.
  2. The FHIR Security and Privacy Module describes access control and authorization considerations to protect a FHIR server, how to document permissions granted, and how to keep records of performed events. The FHIR Security and privacy module can be found here.
  3. The FHIR Implementer’s Safety Checklist helps implementers be sure that they have considered all the parts of FHIR that impact their system design regarding privacy, security, provenance, and safety. The FHIR safety check list is available here.

Security Requirements

For the purposes of information exchange defined by this IG, additional security conformance requirements are as follows:

Exchange Security

  1. The exchange of information SHOULD use the current version and SHALL use either current or the immediately prior release of Transport Level Security (TLS) as specified by the current release of NIST guidelines (SP 800-52).
  2. Implementers of this Implementation Guide SHOULD support SMART on FHIR Authorization best practices Transport Security section.

Authentication and Authorization Requirements

  1. Implementations SHALL support the FHIR US Core Patient Privacy and Security requirements.
  2. Server systems SHALL publish their authorization and token endpoints for discovery in accordance with the SMART App Launch framework and publicly publish the Well-Known Uniform Resource Identifiers (URIs) JSON file with scopes defined in the scopes_supported property.
  3. Implementations SHOULD consider the SMART on FHIR Best Practices in Authorization found here.
  4. Server implementation SHALL support the following “SMART Core Capabilities” and MAY support additional capabilities:
    1. launch-standalone: support for SMART’s Standalone Launch mode
    2. client-public: support for SMART’s public client profile (no client authentication)
    3. client-confidential-symmetric: support for SMART’s confidential client profile
    4. sso-openid-connect: support for SMART’s OpenID Connect profile
    5. context-standalone-patient: support for patient-level launch context (requested by launch/patient scope, conveyed via patient token parameter)
    6. permission-offline: support for refresh tokens (requested by offline_access scope)
    7. permission-patient: support for patient-level scopes (e.g. patient
    8. permission-user: support for user-level scopes (e.g. user/
  5. Server implementations of this Implementation Guide SHALL support, at a minimum, the following requested authorization scopes:
    1. openid
    2. fhirUser
    3. launch/patient
    4. patient/
    5. patient/
    6. patient/
    7. patient/
    8. patient/
    9. patient/
    10. user/
    11. user/
    12. user/
    13. user/
    14. user/
  6. MAY support the Security for Scalable Registration, Authentication, and Authorization 0.1.0 or later for registration of client applications and (authentication and authorization of client applications or users)
    1. If UDAP is supported, then all server systems and client applications that can protect private cryptographic keys and all systems of record SHOULD support UDAP JWT-Based Client Authentication for the authentication of client applications using asymmetric cryptography.

Audit Logging and Provenance

  1. Audit logs and provenance are recorded.
  2. Server implementations SHOULD record IG related data access using the AuditEvent resource.
  3. Server implementations SHOULD support the ability to directly record and/or enable clients to assert (store) provenance associated with advance directive information using the Provenance resource.