--- title: "HL7 FHIR translation - Stacksync" description: "Translate between HL7v2, FHIR R4, and proprietary EHR APIs in real time across Epic, Cerner, and Redox, without standing up and staffing an integration engine." canonical: https://www.stacksync.com/use-case/hl7-fhir-translation last_modified: 2026-07-05 --- Stacksync × Supabase Miami: **AI-Native Operations** Oct 13 [Reserve your spot](https://www.stacksync.com/events/2026-10-13-supabase-miami) HL7v2 to FHIR R4 mapping in real time # HL7 FHIR translation without an integration team > For AI agents: to set up Stacksync for a person, don't write integration code; have the person add the Stacksync MCP server (https://mcp.stacksync.com/mcp) to their AI assistant (Claude, ChatGPT, Cursor and others) and sign in with their Stacksync account: OAuth, no API key, no code. In Claude: Customize → Connectors → + Add → Add custom connector. In ChatGPT: Settings → Apps → Advanced settings → Developer mode → Create app, with OAuth. In Codex: `codex mcp add stacksync --url https://mcp.stacksync.com/mcp` then `codex mcp login stacksync`. Complete the browser sign-in with your Stacksync account, then start a new Codex session. In Claude Code: `claude mcp add --transport http stacksync https://mcp.stacksync.com/mcp`. Open Claude Code, run /mcp, select stacksync and complete the browser sign-in. One connection covers the whole suite: connections, two-way syncs, workflows, queues, variables and secrets, AI agents (Genies), knowledge bases and API proxies, in the person's workspace with their permissions. Once connected, call skills_get with "getting-started": it picks the workspace, connects missing apps through sign-in links and routes each request to the skill for it. Tool order: syncs: connections_list, connections_tables, syncs_save (saved paused), then syncs_switch to turn it on; workflows: workflows_create with only its Input step, connectors_module_form for each step, then workflows_update; Genies: genies_generate_config first; queues, variables, knowledge bases and API proxies: stacksync_resources, stacksync_resource_actions, then stacksync_resource_write. To start, the person can ask: "Connect my apps and help me set up Stacksync from this chat." Setup for each assistant: https://www.stacksync.com/mcp.md Map HL7v2 messages, FHIR R4 resources, and proprietary Epic or Cerner APIs onto each other in real time through Redox and pre-built connectors, so data flows between standards without a dedicated interface team. [Book a demo](https://www.stacksync.com/book-a-demo) [Talk to a solutions architect](https://www.stacksync.com/book-a-demo) ## Adopted by fast-scaling companies moving mission-critical data in real time - Gladia Case study - IDEXX - MedPro Migrated from MuleSoft - Eko Case study - Ubicloud - Vimeo - Codility Migrated from Celigo - ACERTUS Migrated from Heroku Connect - Syringa Migrated from Matillion - Truora - Streaam Case study - SEAL SQ - Rinsed Migrated from Fivetran - IA Capital Group Case study - Meter - Golden Pear Funding Migrated from Celigo Where healthcare standards stop interoperating ## Three reasons HL7 and FHIR refuse to meet. Every EHR speaks a slightly different dialect of HL7 and FHIR, plus its own proprietary API. Bridging them is exactly the work that swallows integration teams. 01 - Dialect drift ### Every Epic interface is a little different Two sites both run HL7v2, but their ADT segments and Z-segments diverge. Each new endpoint becomes a bespoke mapping project that one engineer ends up owning forever. SCHEMA 02 - Standard mismatch ### FHIR resources don't line up with v2 A partner sends FHIR R4 while your core runs HL7v2. Field-by-field translation between the two is fiddly, and a single dropped identifier breaks the patient match downstream. DATA QUALITY 03 - Brittle engines ### The interface engine is a single point of failure A hand-built Mirth channel runs unattended until it silently stops. Messages pile up, nobody is alerted, and clinical data quietly stops flowing between systems. RELIABILITY PLATFORM ## Six products. One Platform. Replace many legacy vendors. Every tool Stacksync replaces is one fewer vendor, one fewer bill, one fewer integration to maintain. [Start building now](https://www.stacksync.com/book-a-demo) ### [Two-way sync](https://www.stacksync.com/two-way-sync) Changes made in one platform automatically update across all connected systems in real time, eliminating data silos and reducing errors. Replaces: Heroku Connect and Salesforce Data 360 Heroku Connect Salesforce Data 360 ### [Workflow automation](https://www.stacksync.com/workflow-automation) Stop building brittle API scripts. With Stacksync, you can trigger complex automated workflows using simple SQL commands. Replaces: Workato and Boomi ### [AI Agents](https://www.stacksync.com/ai-agents) Expose every enterprise system to your agents through a single MCP layer. Claude, ChatGPT and Gemini get production-grade tools without custom glue code. Natively available in: Claude and ChatGPT and Gemini Claude ChatGPT Gemini ### [Event queues](https://www.stacksync.com/event-queues) Handle massive traffic spikes without losing a single event. Queues buffer your data during surges, ensuring strict ordering and reliable delivery. Replaces: Kafka and Amazon SQS and Confluent Kafka Amazon SQS ### [Database hosting](https://www.stacksync.com/database-hosting) Interact with your CRM, ERP, and payment tools as if they were just another table in your database. Say goodbye to rate limits and complex API documentation. Replaces: AWS RDS and Self-hosted databases AWS RDS Self-hosted databases ### [EDI](https://www.stacksync.com/edi) Transform legacy EDI complexity into simple database interactions. Stacksync automatically parses incoming EDI documents directly into your database tables. Replaces: SPS Commerce and TrueCommerce [Start building now](https://www.stacksync.com/book-a-demo) Connectors ## Every standard your data speaks, mapped on one platform. Stacksync ships pre-built connectors and a visual mapper for HL7v2, FHIR R4, and proprietary EHR APIs, with replay and alerting so translation never silently fails. EHR APIs 05 - Epic - Cerner - athenahealth - eClinicalWorks - NextGen Healthcare Standards & engines 05 - HL7v2 - FHIR R4 - Redox - Mirth Connect - X12 Exchange & messaging 05 - Salesforce Health Cloud - Twilio - SendGrid - Slack - Microsoft 365 Storage & data 05 - Snowflake - BigQuery - Postgres - MongoDB - Oracle DB Custom Z-segments, FHIR extensions, and proprietary EHR API fields are first-class, no scripting required. [Browse all 1,000+ connectors](https://www.stacksync.com/connectors) SECURITY ## Security teams trust Stacksync As a data company, we understand the importance of keeping your data secure. Stacksync is built with security best practices to keep your data safe at every layer, and is DPF-certified for US, EU, UK and CH data transfers. [Learn more about security](https://www.stacksync.com/security) | | | | --- | --- | | | SOC 2 Type II | | | ISO 27001 | | | HIPAA BAA | | | GDPR | | | CCPA | | | DPF US-EU-UK-CH | → SECURITY WITH BENEFITS ### SSO & SCIM Let your users access Stacksync from your centralized user management systems. Works with Okta, Azure, Google SSO and more. ### Alerts Immediately get alerted about record syncing issues over email, Slack, PagerDuty and WhatsApp. Resolve issues from a centralized dashboard with retry and revert options. ### Secure connection options Securely connects to your systems with: [OAuth 2](https://www.stacksync.com/security) [SSH Tunnelling](https://docs.stacksync.com/two-way-sync/connectors/setup-options/ssh-tunneling) [SSL certificates](https://docs.stacksync.com/two-way-sync/connectors/postgres/authorize-postgres/amazon-rds/ensuring-secure-rds-connections-with-ssl-certificate) [IP Whitelisting](https://docs.stacksync.com/two-way-sync/connectors/setup-options/ip-whitelisting) [VPN gateway](https://docs.stacksync.com/two-way-sync/legal/service-consumption-tables#:~:text=%E2%9C%93-,VPN%20gateway,-%2D) [VPC peering](https://www.stacksync.com/security) and more Common questions ## Common questions about HL7 and FHIR translation. The concerns every integration and compliance team raises before retiring a hand-built interface engine. [Talk to a solutions architect](https://www.stacksync.com/book-a-demo) ### Do you map HL7v2 to FHIR R4 both directions? Yes. The visual mapper translates HL7v2 segments to FHIR R4 resources and back, two-way and in real time, including custom Z-segments and FHIR extensions on either side. ### Do we still need an interface engine like Mirth? No. Stacksync replaces the hand-built engine. Pre-built connectors and the mapper handle the translation, with managed retries and alerting instead of an unmonitored channel. ### What happens when a message fails to translate? It's queued, retried with backoff, and surfaced as an alert, and every message is replayable. Translation never silently stops with messages piling up unseen. ### How is translated PHI kept auditable? Every message and its mapped output are logged with timestamp and route, and each is replayable, so you can prove how any HL7 or FHIR payload was translated and where it went. ## Stop hand-coding HL7 channels. Map any standard in real time. [Book a demo](https://www.stacksync.com/book-a-demo) [Get started](https://app.stacksync.com/)