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. 2022 Apr 6;5(2):ooac023. doi: 10.1093/jamiaopen/ooac023

Table 1.

Categories of use cases for standards-based APIs, with examples, anticipated value, and barriers

Use case category Example use case Value of APIs Barriers to API adoption
Patient-facing
  • Patients access EHR data using third-party app

  • Patients download and use claims data from health plan in third-party app

  • Patients use single app to schedule appointments across all their providers

  • EHR data are easier for patients to review, aggregate, share, or use for health-related decisions and activities

  • Payer data can help patients make decisions that take costs into account

  • Business model for patient-facing apps are lacking

  • Value to patients of aggregating EHR data or claims data alone may be limited

  • Variable workflows (eg, for scheduling) present challenges for write-based use cases

  • EHR vendors do not always publish endpoints or make it easy to register apps

  • EHR data may be missing or incomplete

  • Patients may not trust app companies with their data

Clinician-facing
  • CDS apps extend EHR functionality, allowing customizations not natively supported by EHR

  • App is developed at 1 institution and easily installed at a different system

  • Clinicians can access data from another healthcare system

  • Facilitates innovation in EHR-based functionality by extending core capabilities; new features can improve care in myriad ways (eg, clinical decision support, workflow improvement)

  • Improves clinician professional satisfaction through more usable tools

  • Fee structures for app developers may limit innovation

  • Data elements available via API vary by vendor so proprietary APIs are still needed

  • Surfacing apps in workflows is challenging (low adoption of CDS hooks)

  • Writing back to APIs is complicated by downstream business logic

Population health and value-based care
  • Provider accesses claims data submitted by other providers

  • Quality measures are retrieved from EHR data and reported to payer

  • Makes more data available for clinical decisions, reduces data collection burden, allows for tracking follow-up visits, enables standardization and reuse of analytic tools

  • Standardizes chart abstraction to enable automation and replace expensive, manual, error-prone processes

  • Lack of trust among providers with sharing data with other providers and with payers

  • FHIR endpoints not established among most providers

  • Integration of data in workflow is challenging

Public health
  • Provider sends and receives immunization data to public health reporting agencies

  • Public health agency receives reportable electronic case data from provider EHR

  • Patient accesses immunization data through app (through EHR or from registry directly)

  • Improves accuracy, quality, completeness, and timeliness of data for public health decisions, forecasting needs, and use in clinical care

  • More efficient data exchange to meet regional and federal reporting requirements

  • Public health agencies lack IT infrastructure and money

  • Federal and regional reporting requirements vary substantially

Administrative
  • Prior Authorization determinations—bidirectional exchange between provider and payer

  • Eligibility checking—bidirectional exchange between provider and payer

  • Payer exchange (of claims data when patients switch plans)

  • Standardizes payer–provider interaction to improve efficiency and accuracy of payment-related determinations

  • Makes it easier for new payer to access claims history for coverage decisions, especially valuable for patients with multiple chronic conditions

  • Lack of trust between payers and providers with exchanging data (value-based contracts better align payer–provider incentives when both parties bear risk)

  • Payers lack experience and work processes for giving real-time responses to prior authorization determinations

Integrating clinical and social services
  • Screening for social risk

  • Closed-loop referrals to social services

  • Facilitates integration of standards-based social risk assessment questionnaires into EHR

  • Enables clinicians to query social services for capabilities/availability, and execute/track referrals

  • Social services lack IT infrastructure and money

  • Capture of social data is unreliable in EHRs and would require workflow changes

  • Unclear financial incentives for data sharing

API: application programming interface; CDS: clinical decision support; EHR: electronic health record; FHIR: fast healthcare interoperability resources.