Transforming Allergy & Immunology Prior Authorization with Da Vinci PAS

The Prior Authorization Burden in Allergy & Immunology

Allergy & Immunology specialists frequently prescribe high-cost, high-complexity treatments such as asthma biologics (e.g., Xolair, Dupixent, Nucala), IVIG/SCIG, and allergen immunotherapy. These therapies are often subject to rigorous prior authorization requirements, which, in a pre-Da Vinci PAS environment, rely on disparate payer portals, fax submissions, and unstructured clinical documentation. This creates significant administrative overhead and contributes to delayed patient access.

Da Vinci PAS: A Standardized Approach for A&I Therapies

The HL7 Da Vinci Project's Prior Authorization Support (PAS) implementation guide provides a standardized, FHIR-based framework for submitting and tracking prior authorizations. For Allergy & Immunology, this means moving beyond fragmented, per-payer custom integrations and towards a uniform digital exchange of clinical and administrative data for high-volume PA categories like biologics and IVIG.

Klivira's Da Vinci PAS Workflow for Allergy & Immunology

• **Coverage Requirements Discovery (CRD)**: At the point of order entry for a biologic or IVIG, Klivira's CDS-Hook integration leverages Da Vinci CRD to identify payer-specific PA requirements, ensuring all necessary documentation is gathered upfront.
• **Structured Documentation Assembly (DTR)**: Where payers support Da Vinci DTR, Klivira presents payer-supplied questionnaires, automatically populating clinical data from the EMR's FHIR resources, replacing manual data entry for conditions like severe asthma or primary immunodeficiency.
• **FHIR-Based PAS Submission**: Klivira constructs and submits a `Claim` resource with structured clinical documentation (e.g., `DocumentReference` for lab results, clinical notes) to the payer's PAS endpoint, eliminating reliance on unstructured PDFs for therapies like allergen immunotherapy.
• **Standardized Response & EMR Integration**: Payer decisions are returned as `ClaimResponse` resources, parsed into a consistent workflow state taxonomy by Klivira, and written back to the EMR's order record, including authorization numbers and decision details.
• **Intelligent Routing for Payer Readiness**: Klivira intelligently routes PA requests via Da Vinci PAS where available, or falls back to X12 278 or payer portals for non-PAS-conformant payers, ensuring continuity for all Allergy & Immunology cases.

Addressing Operational Challenges Unique to A&I

The pre-PAS state in Allergy & Immunology often leads to per-payer custom integration efforts, unstructured clinical attachments for complex biologics, and inconsistent response semantics. Klivira's Da Vinci PAS implementation centralizes these disparate workflows, offering a uniform FHIR operation interface and standardizing the submission of documentation critical for clinical-necessity reviews of high-cost A&I medications.

Regulatory Momentum and Future-Proofing for A&I Practices

The CMS-0057-F mandate requires impacted payers (Medicare Advantage, Medicaid managed-care, CHIP managed-care, QHP-on-FFM) to implement a FHIR-based Prior Authorization API by January 1, 2027, aligning with Da Vinci PAS. Klivira's platform ensures Allergy & Immunology practices are prepared for this transition, leveraging these standards to improve decision turnaround times and reduce administrative burden.