Every hospital running Epic depends on dozens or hundreds of interfaces that move ADT, orders, results, charges and documents between Epic and other systems. Inside Epic, those interfaces are configured through Bridges, Epic’s interface application. Vendors and integration teams who understand how Bridges works scope projects more accurately, test faster and resolve production issues sooner. This guide explains Bridges in practical terms. For broader Epic connectivity, see our Epic integration services. Connecting a system to Epic? Request a free interface review.
What Epic Bridges Is
Bridges is the Epic application used to build and manage interfaces between Epic and external systems. It is configured by health system analysts, often Epic-certified, rather than by outside vendors. Understanding its role clarifies who does what during an interface project and where delays usually occur.
Epic’s interface application
Bridges defines how Epic sends and receives messages, including which events trigger outbound messages, which fields populate each segment and how inbound messages file into the database. Each interface is configured as records and settings within Epic, maintained by the health system’s integration team.
Who configures Bridges
Bridges work is performed by health system analysts with Epic training, sometimes supported by consultants. Outside vendors typically do not access Bridges directly. Instead, they provide specifications and test messages, then work with analysts to adjust mappings until both systems exchange data correctly.
Bridges and integration engines
Many hospitals place an integration engine between Bridges and external systems. The engine handles routing, transformation and connections to many partners. Bridges then maintains fewer, more standardized interfaces. Our Mirth Connect Epic integration work shows how engines complement Bridges. Engines also simplify vendor onboarding.
Standards Bridges supports
Bridges supports HL7 v2 messaging widely, along with other healthcare formats Epic uses for interfaces. HL7 v2 remains the most common standard for real-time feeds. FHIR APIs are a separate integration path, served through Epic’s web services platform rather than configured as traditional Bridges interfaces.
Common Interfaces Built in Bridges
Most Epic hospitals run a similar core set of interfaces, plus many specialized ones. Knowing the common types helps vendors understand what already exists, what can be reused and what new configuration their integration might require from the health system’s team.
ADT feeds
Admission, discharge and transfer messages carry patient registration and movement events to downstream systems. Many vendors start by subscribing to an existing ADT feed. Our guide to HL7 ADT messages explains the event types and segments these feeds contain. Confirm which events your system needs.
Orders and results
Order messages send requests from Epic to labs, imaging and other departmental systems, while result messages return findings. These interfaces require careful code mapping and patient matching. Errors here affect patient care directly, so they demand thorough testing and active monitoring.
Scheduling and charges
Scheduling messages share appointment events with reminder, transport and analytics systems. Charge interfaces send billable services from ancillary systems into Epic billing. Both influence revenue and operations, making accurate mapping and reconciliation essential during testing and after go-live. Reconcile counts daily during early go-live.
Documents and clinical notes
Document interfaces carry reports, notes and scanned images between Epic and other systems. They must preserve formatting, metadata and patient identity. Agree on document types, formats and how corrections or addenda are handled, because readability affects clinical decisions downstream. Test display in every receiving system.
How a Bridges Interface Project Works
Interface projects follow a predictable path from specification to production. Vendors who understand each stage can prepare the right materials, anticipate analyst questions and keep projects moving. Delays most often occur when specifications are incomplete or testing starts without realistic sample messages.
Specification and scoping
The vendor shares an interface specification describing message types, triggers, segments, fields and code sets. Health system analysts compare it with their Bridges standards. Clear, complete specifications reduce back-and-forth and help analysts estimate configuration effort and timelines accurately. Share draft specifications as early as possible.
Configuration and mapping
Analysts configure Bridges records, triggers and field mappings, often reusing existing interface templates. Code mapping for orders, results, locations and providers can take significant time. Vendors should provide code lists early and respond quickly to mapping questions to avoid delays.
Testing cycles
Testing usually includes connectivity tests, unit tests of individual messages and integrated tests that follow realistic workflows. Each cycle surfaces mapping or format issues. Keep a shared issue log with clear owners, so fixes are tracked and retested systematically on both sides.
Go-live and support
After sign-off, the interface moves to production with monitoring in place. Analysts and vendors agree on support contacts, error handling and escalation paths. The first weeks deserve close monitoring, because real-world volumes reveal issues that test environments rarely show. Agree on response times for critical issues.
Tips for Vendors Working With Bridges Teams
Vendors cannot configure Bridges themselves, but they strongly influence how smoothly projects go. Preparation, responsiveness and flexibility make analysts’ work easier, which shortens timelines. These practices consistently help vendor teams complete Epic interfaces faster and with fewer production issues.
Provide complete specifications
Share specifications covering every message type, required field, optional field and code set. Include sample messages for normal and edge cases. Analysts work faster with complete information, and gaps discovered later usually add weeks to project timelines. Version every specification and share updates promptly.
Be flexible with standards
Health systems often have Bridges standards they prefer not to change. Adapting your system to their standard message formats, where possible, speeds configuration. Using an engine on your side for transformation is often easier than requesting custom Bridges changes. Ask for their standard specifications upfront.
Test with realistic data
Use realistic scenarios, including merges, corrections, cancellations and unusual demographics. Simple test messages miss the problems that appear in production. Our HL7 message types reference helps teams plan scenarios across message and event types. Agree on the full scenario list with analysts before testing starts.
Respond quickly to questions
Analysts work across many projects, and slow vendor responses push your interface down their queue. Assign a technical contact who can answer mapping and format questions quickly. Fast responses keep momentum and build goodwill with health system integration teams. Same-day responses keep projects moving.
Supporting Bridges Interfaces After Go-Live
Interfaces need ongoing attention after launch. Upgrades, workflow changes and partner updates can break mappings without warning. Organizations that monitor actively and manage change carefully avoid missing results, lost charges and frustrated clinicians caused by silent interface failures.
Monitoring and error queues
Errors appear in Epic and engine queues when messages fail validation or filing. Assign owners to review queues daily and resolve root causes. Persistent errors usually indicate mapping gaps that should be fixed permanently rather than handled manually each time.
Epic upgrades and testing
Epic upgrades can affect interface behavior and message content. Test critical interfaces in upgraded test environments before production upgrades. Vendors should join this testing for their interfaces, confirming messages still match expectations after each version change. Keep regression test scripts ready for every upgrade.
Change management
Code set updates, new locations, new providers and workflow changes often require interface updates. Establish change processes with partners, including notification timelines and testing requirements. Uncoordinated changes are a leading cause of interface failures months after a successful go-live. Document every change and its approval.
Documentation
Keep up-to-date documentation of message formats, mappings, contacts and escalation paths. Staff turnover on either side can otherwise leave nobody who understands how an interface works. Good documentation shortens troubleshooting and makes future changes safer and faster. Review documentation after every interface change.
How Taction Helps With Epic Bridges Interfaces
Taction has delivered 200+ healthcare projects, including HL7 interfaces and Epic integrations for vendors and hospitals. We help vendors prepare specifications, build engine-side transformations and work effectively with Bridges teams, and we help hospitals support interfaces reliably after go-live.
Free Epic interface review
Share your interface needs and target health systems. We review specifications, recommend message formats and engine design, and identify likely mapping challenges. You get a clear plan for working with Bridges teams efficiently. Request your free review. We also flag likely approval questions early.
HL7 interface development
Our HL7 integration services cover specification writing, engine channels, transformations and testing for Epic interfaces. We adapt your system to health system standards, reducing custom Bridges work and shortening approval and configuration timelines. Every interface ships with monitoring, alerting and clear documentation, so your support team can manage it confidently.
Engine selection and setup
Choosing the right engine affects how easily you integrate with many Epic customers. Our integration engine comparison explains the options, and our engineers set up engines with monitoring, alerting and documentation from day one. We also train your team to manage channels independently after launch.
HL7 engineers on demand
Need experienced interface engineers quickly? Hire HL7 integration engineers who understand Epic interfaces, Bridges workflows and integration engines. They join your team, accelerate projects and document every interface thoroughly for long-term support. Engagements scale with your roadmap, from a single interface to support for many health system customers.
Frequently Asked Questions
These answers cover common questions vendors and hospital teams ask about Epic Bridges. Because every health system configures interfaces differently, a review of your specific integration gives the most reliable guidance on scope and timeline.
What is Epic Bridges?
Epic Bridges is Epic’s interface application, used to configure how Epic sends and receives messages with external systems. Health system analysts build interfaces in Bridges, defining triggers, field mappings and filing rules for HL7 v2 and other formats Epic supports.
Can vendors configure Bridges directly?
Usually not. Bridges is configured by health system analysts with Epic training. Vendors provide specifications, code lists and test messages, then collaborate with analysts during configuration and testing. Using an engine on the vendor side can reduce custom Bridges work.
Is Bridges the same as Epic’s FHIR APIs?
No. Bridges manages traditional interfaces such as HL7 v2 messaging. FHIR APIs are a separate integration path served through Epic’s web services platform. Many integrations combine both, using HL7 feeds for events and FHIR APIs for on-demand data access. Each serves different needs.
How long does a Bridges interface take?
Timelines depend on specification quality, mapping complexity, analyst availability and testing cycles. Reusing existing interface standards shortens timelines. Complete specifications, realistic test data and fast vendor responses consistently help projects reach go-live sooner. Agreeing on test scenarios early and assigning clear owners on both sides also keeps cycles short.
Do we need an integration engine with Bridges?
Not always, but many hospitals use one. Engines handle routing, transformations and connections to many partners, letting Bridges maintain fewer standardized interfaces. Vendors connecting to many Epic customers also benefit from engines that adapt to each site’s standards. Engines also improve monitoring.