QSS Technosoft builds FHIR APIs, FHIR servers and EHR-launched apps for hospitals, healthtech vendors, payers and exchanges: US Core and USCDI data, Bulk FHIR, CDS Hooks and the CMS prior-authorization APIs, delivered on the HL7 FHIR integration tools healthcare teams already run.
100+ healthcare projects | 16+ years in healthcare | FHIR R4 · US Core · SMART App Launch · Bulk FHIR
FHIR R4 · US CoreCDS HooksFHIR standards
100+Healthcare projectsProven healthcare expertise
CMMILevel 3ISO 27001 · ISO 9001
16+ yearsIn healthcareUS-headquartered in Bloomington, MNTrusted Partners
FHIR has moved from pilot to obligation: certified EHRs must expose it, payers must build on it by 2027, and every new clinical app expects it. We pick the HL7 FHIR integration tools healthcare organizations actually need for the job, and build the APIs, servers and apps on top of them.
CHALLENGES FHIR TEAMS FACE
FHIR projects rarely stall on the specification. They stall on the EHR's version of it, the scope the vendor won't grant, the legacy system that has no API and the compliance date that doesn't move. Here is where we see teams get stuck, and how our FHIR work is built to get them unstuck.
Problem
How we solve itWe build to US Core first, then profile each target EHR's sandbox (Epic, Oracle Health, athenahealth) and add a thin adapter per vendor, so one app or API works across all of them.
One integration, many EHRs.ProblemHow we solve itWe plan the launch model, scopes and security review around each vendor's app program from day one, and prepare the evidence their reviewers ask for.
Fewer surprises at marketplace review.ProblemHow we solve itA FHIR facade that maps legacy databases, HL7 v2 feeds and C-CDA documents into US Core resources, so modern apps get a standard API without a system replacement.
FHIR access without a rip-and-replace.ProblemHow we solve itPatient Access, Provider Access, Payer-to-Payer and Prior Authorization APIs built on the Da Vinci, CARIN and PDex implementation guides, tested against the reference tools.
A compliance plan with dates, not hopes.ProblemHow we solve itBulk FHIR ($export) pipelines with backend-services authorization, landing NDJSON into your warehouse or lake for analytics, quality reporting and AI.
Whole-population data on a schedule.ProblemHow we solve itFHIR engineers who already know HAPI, the cloud FHIR services, SMART App Launch and the EHR vendors' quirks, ramped onto your project within 14 days of signing.
Capacity that understands the standard.
Facing similar challenges?Tell us which EHRs, payers or networks you need to reach, and we'll map the FHIR route to each one.Talk to Our US Team →OUR SERVICES
APIs, servers, apps and regulatory interfaces on FHIR. For HL7 v2 messaging and interface engines, see our HL7 Interface Development page; this page covers the FHIR side of the work.
FHIR API development and FHIR server implementation
RESTful FHIR R4 APIs and the server behind them, profiled to US Core and USCDI so any compliant client can read and write your data. We also design for R5 where your use case needs it.
FHIR serversHAPI FHIR, Azure Health Data Services, AWS HealthLake or Google Cloud Healthcare API.
US Core profilesResources, search parameters and terminology bound to USCDI data classes.
Read and writeCreate, update, search, history and FHIR Subscriptions for event-driven workflows.
Developer experienceCapability statements, API documentation and a sandbox for your partners.
4FHIR server options
2FHIR releases: R4, R5
1Capability statement per APIFHIR facades over legacy and non-FHIR systems
Most clinical data still sits in systems that predate FHIR. A facade gives that data a standard API without moving it, and lets you modernize behind the API at your own pace.
Source mappingRelational databases, HL7 v2 feeds and C-CDA documents mapped to FHIR resources.Interface enginesMirth Connect and Iguana channels, the HL7 FHIR integration tools healthcare IT teams already run, used to feed the facade.TerminologyLocal codes mapped to SNOMED CT, LOINC, RxNorm and ICD-10.Phased modernizationFacade first, then data migration behind it when you are ready.3Source types: database, v2, C-CDA4Terminologies mapped0Systems replaced to get an APISMART on FHIR app development
Apps that open inside the EHR with the patient already selected, use the EHR's own login and read and write through FHIR. It is the most direct route to clinician adoption, and the standard patient apps use to connect to a provider or payer.
Launch modesEHR launch, standalone launch and backend services, on SMART App Launch v2.AuthorizationOAuth 2.0, OpenID Connect, PKCE and granular scopes limited to what the app needs.CDS HooksCards and suggestions returned at order entry, patient view and other workflow points.App programsBuild and review support for Epic, Oracle Health and athenahealth developer programs.3Launch modes3EHR app programs supported1Login: the EHR's ownEHR integration for healthtech and SaaS vendors
For product companies that need patient data from, and results written back to, the EHRs their customers run. We build one integration layer your product calls, with per-EHR adapters underneath.
EHR platformsEpic, Oracle Health (Cerner), Meditech, Allscripts (Veradigm), athenahealth and OpenEMR.Write-backNotes, observations, orders and documents written back where the EHR allows it.Multi-tenant designOne product, many health-system customers, each with its own endpoints and keys.Marketplace readinessSecurity questionnaires, app listing content and production onboarding.6EHR platforms integrated20+EHR/EMR/HIS integrations delivered1Integration layer for every EHRPayer FHIR APIs for CMS-0057-F and electronic prior authorization
The interoperability and prior-authorization rule requires impacted payers to run four FHIR APIs from January 1, 2027. We build them, connect them to claims and utilization-management systems, and help providers consume them.
Access APIsPatient Access (CARIN Blue Button), Provider Access and Payer-to-Payer (PDex).Prior Authorization APIDa Vinci CRD, DTR and PAS, with X12 278 translation where needed.Provider directoryPlan-Net directory API kept in sync with credentialing data.ReportingAPI usage and prior-authorization metrics for CMS public reporting.4Required payer APIs3Da Vinci guides: CRD, DTR, PAS2027API compliance yearBulk FHIR, analytics and national-network exchange
Population-scale data movement and the FHIR side of national exchange, so analytics, quality and care-management teams work from current data.
Bulk FHIR$export at system, group and patient level with backend-services authorization.Analytics pipelinesNDJSON into a warehouse or lake, with de-identification where required.National networksFHIR exchange through TEFCA QHINs and the CMS Aligned Networks program.Patient-shared dataSMART Health Cards and Links for digital check-in and record sharing.3Bulk export levels2Network routes: TEFCA, CMS aligned1Data pipeline to your warehouseA FHIR API is only as good as the data behind it and the systems that call it. QSS builds FHIR on the interoperability backbone we have engineered for healthcare clients for 16+ years, with dedicated HL7, FHIR, Mirth Connect and Iguana practices, so the HL7 FHIR integration tools healthcare teams depend on and the new APIs and apps work as one layer.
Our FHIR engineers sit next to our HL7 v2 and interface-engine teams. When a FHIR API needs data from an ADT feed or a C-CDA archive, the people who build those feeds are on the same project.
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EHR launch, standalone launch, backend services and CDS Hooks, built to SMART App Launch v2 and planned around each vendor's app review, not just its sandbox.
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Cures Act API and information-blocking rules, USCDI v3 and US Core, CMS-0057-F, TEFCA and 42 CFR Part 2. We tell you which rule applies to you and what date it carries.
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We build the payer APIs and the provider and app-side code that consumes them, so prior authorization and data exchange work end to end rather than on one side only.
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Summaries, prior-authorization document assembly and data-quality checks built on FHIR resources, with a clinician or analyst reviewing every output that touches a patient.
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Fixed-scope FHIR projects, a dedicated FHIR team or build-operate-transfer, under CMMI Level 3 and ISO 27001 processes, with 4.9/5 client satisfaction on Clutch.
Learn more →The building blocks we draw on most often. Select the ones that matter and we'll map them to your architecture in the discovery call.
Read, search, create and update with US Core profiles
HAPI FHIR or a cloud FHIR service as your clinical data store
EHR and standalone launch with OAuth 2.0 and OpenID Connect
System-to-system access with signed JWT client credentials
In-workflow cards at order entry and patient view
Standard APIs over legacy databases and feeds
Population data as NDJSON for analytics and quality
Claims and clinical data for patient-chosen apps
Attributed-patient data for in-network providers
Member history moved when coverage changes
Da Vinci CRD, DTR and PAS workflows
One product integration across Epic, Oracle Health and athenahealth
Event notifications instead of polling
Transformation of legacy feeds and documents into resources
SNOMED CT, LOINC, RxNorm and ICD-10 mapping and validation
Plan-Net directory synced with credentialing data
Scope, consent and 42 CFR Part 2 rules applied per request
Patient-shared records for digital check-in
Notes, observations and documents returned to the EHR
Inferno, Touchstone and the FHIR Validator in CI
The HL7 FHIR integration tools healthcare teams already own, such as Mirth Connect and Iguana, wired into the FHIR layer
Rate limits, keys and usage analytics per client
Documentation, sandbox and app registration for partners
Request-level audit, latency and error dashboards
Moves between US Core, SMART and FHIR versions without breaking clients
HOSPITALS & HEALTH SYSTEMS
Open APIs without opening risk
Certified FHIR APIs exposed safely to approved apps, plus the internal apps and CDS services that bring outside data into clinician workflows.
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Approved Apps
Clinician Workflow
Controlled AccessHEALTHTECH & SAAS VENDORS
Your product inside the EHR
SMART on FHIR apps and multi-EHR integration layers that get a product into Epic, Oracle Health and athenahealth customers, and keep it there.
Learn More →EHR LaunchFaster OnboardingMulti-EHR ReachHEALTH PLANS & PAYERS
CMS-0057-F APIs on schedule
Patient Access, Provider Access, Payer-to-Payer and Prior Authorization APIs connected to your claims and utilization-management systems.
Learn More →Required APIsFaster AuthorizationsMember ContinuityHIEs & NETWORKS
FHIR alongside document exchange
FHIR query, Bulk FHIR and TEFCA-facilitated FHIR added to an exchange that already runs on IHE documents and HL7 feeds.
Learn More →Network QueryPopulation DataTEFCA ReadyLABS & DIAGNOSTICS
Orders and results as resources
ServiceRequest, DiagnosticReport and Observation APIs that let ordering systems and apps work with lab data directly.
Learn More →Structured ResultsOrder StatusDirect AccessTELEHEALTH & REMOTE MONITORING
Virtual visits with the full chart
Telehealth and remote-monitoring platforms that read the chart before the visit and write vitals and notes back after it.
Learn More →Chart ContextDevice DataNote Write-backLIFE SCIENCES & RESEARCH
Cohorts from real-world data
Bulk FHIR extracts, de-identification and EHR-to-study pipelines for research, registries and real-world evidence.
Learn More →Cohort DiscoveryClean ExtractsStudy FeedsFHIR Programs & Use Cases
Compliance
Marketplaces
Facades
Portals
Decision
Population
MigrationReal results. Real impact. Empowering better care through technology.
We enhanced a personal health record (PHR) app that stores an individual's complete wellness data in one accessible place. Patients search for doctors, view lab results and communicate with providers on the go.
Tech Used
React Native · Node.js · MongoDB · AWS · HL7 FHIR
Results
A healthcare connectivity solution bridging hospitals, caregivers, pharmacists and patients in senior living facilities, managing records, prescriptions and care coordination in real time.
Tech Used
.NET Core · Azure · HL7 · SQL Server · Xamarin
Results
We integrated Iguana to power a cloud-based document storage solution for senior living communities, enabling digital uploads, e-signatures and secure document sharing without physical paperwork.
Tech Used
Iguana · HL7 · REST APIs · AWS · MongoDB · Angular
Results
Standard FHIR resources give AI clean, coded input and a standard way to return results to the EHR. We use that to save clinicians and analysts time, and keep a person in control of anything that touches a patient.
FHIR Data
Resources, bundles, Bulk exports, documents
AI Engine
Summarize, extract, map, check
Clinician Review
Human oversight + audit trail
Action
Faster decisions, cleaner data
Chart summaries in the EHROne-page summaries launched in context, linked to source resources
Prior-auth documentationDraft DTR answers from the chart for staff to confirm
Document to FHIRTurn PDFs and narrative notes into coded resources for review
Mapping & conformance checksDraft profile mappings and flag invalid resources before go-liveAn open API is a new front door to protected health information. We design every FHIR API and app to the regulations, implementation guides and security models that apply, and can show you how, control by control.
OAuth 2.0 and OpenID Connect, with PKCE, short-lived tokens and granular scopes so each app sees only what it needs.
APIs built to the ONC standardized-API criteria, US Core and USCDI v3, with information-blocking exceptions documented. Certification itself is completed by your organization through an ONC-authorized body.
Payer APIs built to the CMS-recommended CARIN, PDex, Plan-Net and Da Vinci guides, with the metrics CMS requires reported.
Patient consent, 42 CFR Part 2 and state sensitive-data rules applied before a resource is released, with security labels where required.
AES-256 at rest and TLS 1.2+ in transit for every API call, export file and token, with key rotation.
Every request, token grant and export logged with client, user, patient and purpose, exportable for OCR audits.
HIPAA-eligible environments on AWS, Azure or Google Cloud with BAAs in place; high availability, backups and tested disaster recovery.
Inferno and Touchstone conformance runs, third-party penetration tests and API security testing before every production release.
Best for a set launch. One app, one API set or one EHR integration, with fixed price, milestone-based delivery and a clear go-live date.
Best for an ongoing product or program. Named FHIR engineers, integration analysts and QA who work as an extension of your team.
Best when you want to own the capability long term. We build and run the team and platform, then transfer both to you on an agreed timeline.
We choose the stack for your requirements, not the other way round. These are the FHIR specifications we build to and the HL7 FHIR integration tools healthcare teams most often ask us about.
FHIR standardsFHIR R4 and R5 · US Core · USCDI v3 · SMART App Launch v2 · Bulk Data · CDS Hooks · FHIR Subscriptions
Regulatory guidesCARIN Blue Button · Da Vinci PDex, CRD, DTR, PAS · Plan-Net · SMART Health Cards and Links
FHIR serversHAPI FHIR · Azure Health Data Services · AWS HealthLake · Google Cloud Healthcare API
App launch & identitySMART client libraries (JS, .NET, Java, Python) · OAuth 2.0 · OpenID Connect · Keycloak · EHR sandboxes (Epic, Oracle Health, athenahealth)
Integration & transformationMirth Connect · Iguana · FHIR Mapping Language · v2-to-FHIR and C-CDA-to-FHIR mappings · SNOMED CT · LOINC · RxNorm
TestingInferno · Touchstone · HL7 FHIR Validator · Postman · JMeter
Application stackJava / Spring Boot · .NET · Node.js · Python · React · Angular · React Native · Flutter
Cloud & DevOpsAWS · Microsoft Azure · Google Cloud · Docker · Kubernetes · API gateways · Grafana · PrometheusEvery FHIR project is scoped to its systems, partners and rules, but buyers deserve a straight answer. These are typical ranges based on our delivery history and current market rates.
One EHR connection (read or read/write) or a defined set of FHIR APIs on a server or facade
6–12 weeks
$14,000–$45,000
Typical investment
An EHR-launched app MVP for one or two EHRs, or the CMS-0057-F access APIs on an existing data platform
3–5 months
$38,000–$110,000
Typical investment
FHIR server and facade, multi-EHR adapters, Bulk FHIR, CDS Hooks and the full payer API suite including prior authorization
6–10 months, phased
$140,000–$240,000+
Typical investment
Figures are indicative and exclude EHR vendor program and API fees, which are quoted separately. You leave the discovery call with a range specific to your project.
Get an Estimate for Your Project →Talk to a healthcare interoperability architect about the EHRs, payers and networks you need to reach, and leave the call with a FHIR integration map, a compliance timeline and a cost range.
ExpertGuidance
TailoredRecommendations
Clear Cost& TimelineAnswers about our FHIR integration services, EHR-launched apps, payer APIs, compliance, timelines and costs.
FHIR (Fast Healthcare Interoperability Resources) is the HL7 standard for exchanging health data through web APIs. FHIR integration services cover the work of connecting systems through it: building FHIR APIs and servers, putting a FHIR facade over systems that don't speak it, connecting apps and products to EHRs, building the payer APIs that CMS requires, and moving population data with Bulk FHIR. The goal is standard, secure access to clinical and claims data without a custom interface for every partner.
A single EHR connection or small API set typically costs $14,000–$45,000. An EHR-launched app MVP or a payer access-API program runs $38,000–$110,000, and an enterprise FHIR platform $140,000–$240,000 or more. EHR vendor program and API fees are separate. The main cost drivers are the number of EHRs, read-only versus write-back, the implementation guides involved and the state of the source data.
A single EHR connection or API set takes 6 to 12 weeks. An app MVP or payer API program takes 3 to 5 months, and an enterprise platform 6 to 10 months in phases. EHR marketplace review can add several weeks, so we plan for it from the start.
Usually both. A proven FHIR server (HAPI FHIR or a cloud FHIR service) saves you from building the standard yourself; the custom part is your data mapping, workflows, security model and per-EHR adapters. Buy a commercial integration platform when your needs are standard and you accept its pricing per connection; build when integration is part of your product or the volumes make licenses expensive. We give you a recommendation in the discovery call.
Yes. We build to US Core and each vendor's FHIR APIs, test in their sandboxes and support their developer and marketplace review processes. We also integrate Meditech, Allscripts (Veradigm) and OpenEMR. Where an EHR's FHIR API doesn't cover what you need, we combine it with HL7 v2 feeds or vendor APIs.
SMART on FHIR is the open standard that lets an app launch from inside an EHR or patient portal, sign the user in through OAuth 2.0 and OpenID Connect, and read or write data through FHIR APIs with the scopes the user approves. Certified US EHRs are required to support it, which is why one app can run across many health systems.
Yes: clinician apps that launch in context inside the EHR, standalone patient apps, backend services that exchange data system to system, and CDS Hooks services that return guidance at the point of care. We build to SMART App Launch v2 and take the app through each EHR vendor's review.
HL7 v2 is the messaging standard that still carries most data inside hospitals: admissions, orders and results. FHIR is the API standard for apps, patient access, payers and anything new. Most organizations need both for years. Our HL7 Interface Development team builds the v2 side; this team builds the FHIR side, and the two connect through one integration layer.
Impacted payers (Medicare Advantage, Medicaid, CHIP and qualified health plans on the federal exchanges) must run four FHIR APIs by January 1, 2027: Patient Access, Provider Access, Payer-to-Payer and Prior Authorization. Prior-authorization decision timeframes and denial reasons took effect on January 1, 2026. We build the APIs to the CMS-recommended implementation guides and connect them to your claims and utilization-management systems.
A FHIR server or facade to expose data, SMART App Launch libraries for apps, an interface engine such as Mirth Connect or Iguana to feed legacy data in, and test tools such as Inferno, Touchstone and the FHIR Validator. The right mix of HL7 FHIR integration tools healthcare organizations need depends on whether you are publishing data, consuming it or both; the technology section above lists what we use.
Rarely. We build the FHIR layer on the HL7 FHIR integration tools healthcare teams already own, such as Mirth Connect, Iguana and existing cloud services, and recommend a change only when a tool cannot meet the FHIR version, volume or security model you need.
A facade is a FHIR API that sits in front of a non-FHIR system and translates requests and responses on the fly, so data stays where it is. It makes sense when you need standard APIs quickly, the source system will stay for years, or a full migration is too risky. A FHIR server with copied data is better when you need fast search across many sources or heavy analytics.
Bulk FHIR exports data for a whole population, a group or all patients as files rather than one request at a time. It is used for quality measures, risk adjustment, care management, payer data exchange and analytics, and it uses backend-services authorization rather than a user login.
R4 for almost everything in the US today: US Core, the ONC certification criteria and the CMS payer guides are all R4-based. We use R5 features where a specific use case needs them and design so a later upgrade does not break your clients.
OAuth 2.0 and OpenID Connect with SMART scopes, PKCE and short-lived tokens; TLS 1.2+ and AES-256 encryption; consent and sensitive-data rules applied before data is released; request-level audit; and penetration and conformance testing before every release. Hosting is on HIPAA-eligible cloud with BAAs in place.
Yes. CDS Hooks lets an external service return cards, such as alerts, suggested orders or links to a SMART app, at defined points in the EHR workflow like order entry or opening a chart. We build the service, the logic and the app it links to, and test them in the EHR vendors' environments.
Yes. We add FHIR query and retrieval through TEFCA QHINs and networks in the CMS Aligned Networks program on top of your existing exchange. For document-based exchange through IHE profiles, our Health Information Exchange team covers the full network onboarding.
Yes. We monitor API health and latency, handle EHR vendor changes, add new resources, EHRs and partners, and upgrade US Core, SMART App Launch and FHIR versions as regulations move, as a fixed support plan or through a dedicated team. Button: View All FAQs
