FHIR API Design & Development
Build and expose FHIR R4 APIs on US Core, ready for app, portal, and patient-access use.
FHIR Services
FHIR Integration Services
Connect payer, provider, and EHR systems on HL7 FHIR, and hit CMS deadlines without stalling your roadmap.
15+Years in healthcare IT
200+Healthcare integrations live
AllMajor EHRs supported
R4FHIR-native delivery
“FHIR-compliant” and “interoperable” are not the same thing. Plenty of systems expose a FHIR endpoint and still cannot move a record where it needs to go. We build and run FHIR integrations for payers, providers, and health IT vendors, so a clinician or an app gets the data it asked for in seconds.
Our Solutions
What Our FHIR Services Cover
From data model to live API, we cover the full path.
HL7 v2 & C-CDA to FHIR
Map and migrate existing v2 feeds and CDA documents into clean FHIR resources.
Epic & EHR Integration
Connect to Epic, Oracle Health, and athenahealth through SMART on FHIR and OAuth 2.0.
Legacy EHR Modernization
Expose legacy and warehouse data through FHIR so modern systems can read it.
Auth & Access Control
Secure resources with OAuth 2.0, SMART on FHIR, and OpenID Connect.
FHIR Server Setup
Select and stand up HAPI, Azure Health Data Services, Google Cloud Healthcare API, or a managed engine.
Our Solutions
Our FHIR Integration Solutions
Five areas where FHIR projects are won, and how we deliver each.
FHIR APIs & Integration Engine
Why it matters
Most organizations already run HL7 v2 feeds, flat files, and point-to-point interfaces. The goal is one reliable flow of data, not another interface to babysit.
How we do it
We stand up the integration layer that keeps systems in sync, and pick the right vehicle for your stack and budget: an integration engine, an open-source FHIR server, or a managed platform. Then we build it.
Standards we work in
FHIR R4
FHIR R5
HL7 v2.x
REST APIs
FHIR Bulk Data
HL7 v2 & C-CDA to FHIR
Why it matters
Your v2 estate is not going away. It has to coexist with, and feed, modern FHIR APIs.
How we do it
We map v2 messages and C-CDA documents to FHIR resources, validate against the implementation guides your partners use, and run both in parallel so nothing breaks during the move.
Standards we work in
HL7 v2.x (ADT, ORM, ORU)
C-CDA
FHIR R4
US Core
USCDI v3
Epic & EHR Integration
Why it matters
Connecting to Epic, Oracle Health, and athenahealth means clearing each vendor's app registration, scopes, and endpoints before a single record moves.
How we do it
We handle SMART on FHIR app launch, the OAuth 2.0 flow, and the read and write patterns each EHR supports, so your app exchanges what it needs and clears vendor review the first time.
Standards we work in
SMART on FHIR
OAuth 2.0
FHIR R4
Vendor-specific app frameworks
Legacy EHR Modernization
Why it matters
Old EHR and warehouse data does not disappear when standards change, and it should not become a dead end.
How we do it
Where a full migration is not practical, we put a FHIR facade in front of the legacy store. Where it is, we move the data to native FHIR. Either way, mobile apps, analytics, and partners can read it.
Standards we work in
FHIR R4
US Core
Custom adapters
FHIR facade patterns
CMS-0057-F & Compliance
Why it matters
CMS-0057-F, the Interoperability and Prior Authorization Final Rule, sets hard dates. Operational provisions started January 1, 2026. By January 1, 2027, affected payers (Medicare Advantage, Medicaid, CHIP, and QHP issuers on the federal exchanges) must run the Patient Access, Provider Access, Payer-to-Payer, and Prior Authorization FHIR APIs.
How we do it
We build to US Core and SMART on FHIR, design the Prior Authorization API around FHIR, and keep the work HIPAA-aligned so you stay inside the rule.
Standards we work in
CMS-0057-F
US Core
SMART on FHIR
HIPAA
21st Century Cures
How We Deliver Your FHIR Project
Whether you are building new, fixing what stalled, or simplifying what grew too complex.
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1
Assess & Design
Current-state review of your feeds, systems, and gaps. We map data to FHIR resources and choose the engine or server that fits.
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2
Build & Integrate
API development, v2-to-FHIR mapping, EHR connections, auth, and consent. Tested against real partner traffic before go-live, not synthetic samples.
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3
Sustain & Scale
Interface monitoring, partner version-change response, regression testing, and documentation rebuilt from the running config.
Where FHIR Projects Actually Stall
The theory is settled. These are the roadblocks we see most.
Enterprise integration
Holding a single source of truth across the organization is hard.
FHIR extensions
Base resources do not cover every real-world use case.
Cross-version support
Partners run different versions of the standard and still have to interoperate.
Consent management
Handling member consent through APIs gets tricky fast.
Security
FHIR does not define security protocols, which leaves gaps to close.
Monitoring & monetization
FHIR does not account for provisioning, metering, or billing.
Who We Work With
Built for Your Side of the Exchange
Built to support different parts of the healthcare exchange with the right mix of FHIR APIs, integration, and compliance expertise.
HIT Vendors & ISVs
Add FHIR APIs to your product and clear EHR app reviews without pulling engineers off the roadmap.
Providers
Expose patient and clinical data through compliant FHIR APIs and connect to the EHRs you already run.
Payers
Stand up the CMS-0057-F APIs (Patient Access, Provider Access, Payer-to-Payer, Prior Authorization) on FHIR.
Why Choose Us
Why Choose Nalashaa for FHIR
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We pick the right approach, not the one tool we sell. Engine, server, or platform, chosen for your stack.
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Compliance is built in from the start, not bolted on at the end.
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We get the edge cases right early, which saves a second rebuild later.
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Delivered across payer and provider systems in production, not slideware.
FHIR R4
HL7 v2
SMART on FHIR
US Core
CMS-0057-F
24/7post-launch support
ISO9001:2015 + 27001:2022
0reportable HIPAA incidents
Work with us
Get a Free FHIR Integration Assessment
Working on FHIR, HL7, prior authorization, or payer data exchange?
We start with a current-state review. Typically a 45-minute call plus a written summary of your integration and compliance gaps within 5 business days. No commitment to engage further.
Talk to a FHIR Integration Expert
Free consultation
Other Healthcare IT Services We Deliver
Interoperability Solutions
Learn more
Compliance & Validation
Learn more
EDI Services
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Cloud Services
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Data Services
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Frequently Asked Questions
What Is FHIR Implementation?
FHIR (Fast Healthcare Interoperability Resources) is the HL7 standard for exchanging health data over web APIs. Implementing it takes more than switching on endpoints. You map your data to FHIR resources, set up authentication, handle versioning, manage consent, and test against the implementation guides your partners use.
HL7 v2 vs FHIR: What to Use When
v2 moves data as pipe-delimited messages and still runs most clinical workflows. FHIR uses REST and JSON, which makes data easier to read, query, and share with apps. Most organizations run both and map v2 into FHIR.
Integration Engine or FHIR Server?
An integration engine routes and transforms messages across many interfaces. A FHIR server stores and serves FHIR resources. Some teams need one, some need both. We assess before recommending.
What are FHIR services?
FHIR services cover the design, build, integration, and support needed to exchange health data using the HL7 FHIR standard. That includes API development, HL7 v2 to FHIR conversion, EHR integration, authentication, and compliance support.
What is the difference between HL7 v2 and FHIR?
HL7 v2 is the older messaging standard that moves data as pipe-delimited messages between systems. FHIR uses REST APIs and JSON, which makes data easier to read, query, and share with apps. Many organizations run both and map v2 feeds into FHIR.
Do we need a FHIR integration engine or a FHIR server?
It depends on your systems. An integration engine routes and transforms messages across many interfaces. A FHIR server stores and serves FHIR resources. Some teams need one, some need both. We assess your setup before recommending either.
How does FHIR relate to Epic integration?
Epic exposes FHIR APIs for approved apps. Connecting to Epic means registering your app, requesting the right scopes, and building the SMART on FHIR launch and OAuth flow. The same pattern applies to Oracle Health and athenahealth, with vendor-specific differences.
What does CMS-0057-F require?
Affected payers must add prior authorization data to the Patient Access API and run Provider Access, Payer-to-Payer, and Prior Authorization FHIR APIs. Operational provisions began in 2026 and the API requirements apply from January 1, 2027.
Is FHIR the same as an API?
No. FHIR is a standard that defines how health data is structured and exchanged. An API is the interface that delivers it. A FHIR API is an API that follows the FHIR standard.