Patient Access

What's an API?

An Application Programming Interface (API) is a computing interface to a software component or a system, that defines how other components or systems can use it¹. It defines the kinds of calls or requests that can be made, how to make them, the data formats that should be used, the conventions to follow, etc. It can also provide extension mechanisms so that users can extend existing functionality in various ways and to varying degrees.

What is FHIR?

According to the HL7 organization, the creators of FHIR… FHIR® – Fast Healthcare Interoperability Resources ( – is a next-generation standard's framework created by HL7². FHIR combines the best features of HL7's v2 , HL7 v3, and CDA product lines while leveraging the latest web standards and applying a tight focus on implementability. FHIR solutions are built from a set of modular components called 'Resources'. These resources can easily be assembled into working systems that solve real-world clinical and administrative problems at a fraction of the price of existing alternatives. FHIR is suitable for use in a wide variety of contexts – mobile phone apps, cloud communications, EHR-based data sharing, server communication in large institutional healthcare providers, and much more.


CMS, in partnership with the Office of the National Coordinator for Health Information Technology (ONC), has identified Health Level 7® (HL7) Fast Healthcare Interoperability Resources® (FHIR) Release 4.0.1 as the foundational standard³ to support data exchange via secure application programming interfaces (APIs). CMS is adopting the standards for FHIR-based APIs being finalized by HHS in the ONC 21st Century Cures Act rule at 45 CFR 170.215. These requirements support the privacy and security of patient information.

What are the requirements to meet the “Provide Patient Electronic Access to Their Health Information” measure?

This final rule is focused on driving interoperability³ and patient access to health information by liberating patient data using CMS authority to regulate Medicare Advantage (MA), Medicaid, CHIP, and Qualified Health Plan (QHP) issuers on the Federally-facilitated Exchanges (FFEs).

1) Providing patient access software

The patient (or the patient-authorized representative) is provided timely access to view online, download, and transmit his or her health information. Access to the health information must be provided by both a portal and via an API.

2) Enabling the API functionality for use with an app of the patient's choice.

API functionality must be fully enabled such that any patient access software application chosen by a patient would allow them to gain access to their individual health information, provided the application is configured to meet the technical specifications of the API. It is not the responsibility of the eligible professionals to provide the application (Final Rule pg. 520).

It is their responsibility to meet the functional standard for on-boarding an application. As such, security policies and procedures need to be in place to screen and vet apps that have been brought forward by the patient (see “Providing API and Smartphone Access” for more information). Should zero patients request to connect via an application during a given report period, there would be no penalty applied for low buy-in with API usage.

Providing API and Smartphone Access to Patients

From Bridge's perspective, the regulations set forth in the 21st Century Cures Act that make rule changes to the CMS and ONC legislation falls into a “gray area”. It is Bridge's interpretation that a ONC-certified EHR / EHR modular solution is required to provide FHIR-ready API access to the healthcare organization. The healthcare organization should make it easy for patients to access their patient information via a portal and their own or recommended smartphone app. This would typically be an app provided by the certified EHR vendor or one provided by the healthcare organization using the EHR vendor-provided API. There is a clear responsibility that is put on the EHR/Portal vendor and/or mobile app developer to follow the guidelines set forth in the final rule, as well as other regulations set by the FDC and HIPAA for example. In any case, API and smartphone access supporting the USCDI data set should be provided to patients by the healthcare organization in collaboration with health IT vendors.

It is Bridge's advice to their clients that the “conversation” around which apps can be used by patients to access their health information should be controlled as much as possible by the healthcare organization. Providing patient access software such as a portal with limited functionality and especially one that is not mobile-responsive will drive a high number of requests for an app and/or API access. If no healthcare organization-sponsored smartphone app or list of compatible 3rd party smartphone apps is provided to the patient, and only the API access offered, the healthcare organization runs a significant risk of needing to respond to the many and diverse demands of patients to use the app of their personal preference. The goal is simply to control the conversation and give patients what they will likely want in a portal and smartphone app offering.

Bridge Patient Portal's FHIR-Ready API

Bridge Patient Portal is an ONC Certified 2015 Edition EHR Modular solution. View Bridge's CHPL here.

In healthcare, APIs help connect different systems together. In the case of Bridge Patient Portal, this is typically Bridge Patient Portal connecting to a healthcare organization's Electronic Health Record (EHR) or Revenue Cycle Management (RCM) software. Bridge's API can also be used to connect websites, apps, etc. to Bridge Patient Portal. Bridge is an EHR vendor-neutral patient engagement software vendor. Bridge's API can be used for both robust integrations with EHR/PM/RCM software systems, as well as patient access software, in the event that their EMR/PM/RCM vendor is unable to meet the FHIR API requirements for patient access.

Please contact Bridge Patient Portal's team with any questions.

  1. Wikipedia. (2020). API. [online] Available at:
  2. (n.d.). Modules - FHIR v4.0.1. [online] Available at:
  3. (n.d.). Interoperability and Patient Access Fact Sheet | CMS. [online] Available at: