quadevs
Practice / HEALTHCARE

Healthcare integration development

HEDIS measurement reporting, FHIR and TEFCA interoperability, clinical document workflows, and the audit trail you can hand to a compliance team without flinching.

If you are looking for a healthcare integration developer or a healthcare software development agency that already speaks FHIR R4, HL7, HEDIS, TEFCA, and HIPAA: this page is for you. Healthcare engineering rewards depth, not flash. We have spent ten years on the integration side of the work, pulling data out of EHRs, fax lines, and insurance portals; mapping it into HEDIS measures; passing audits without rework; and standing behind systems that run unattended for years.

Our healthcare integration development practice spans FHIR R4 and SMART-on-FHIR integrations, TEFCA QHIN connectivity, USCDI v3 data classes, HEDIS measurement pipelines, clinical document watchers, medical OCR and classification at scale, multilingual clinic platforms, HIPAA-aware file delivery, and patient-facing native mobile applications. The audit trail comes baked in, not bolted on.

The cases below are anonymized but real. If a project of yours overlaps any of them, we already speak the same language. We engage on direct contracts under your BAA, not as a subcontractor.

Common questions

What is HEDIS measurement reporting in healthcare engineering?
HEDIS (Healthcare Effectiveness Data and Information Set) is a standardized set of measures used by payers to evaluate care quality. A HEDIS measurement pipeline ingests clinical documents, claims data, and member records, normalizes them against the current measure year, and emits the numerators, denominators, and exclusions an auditor can reproduce. We engineer these pipelines to run unattended, recover from upstream outages, and survive an external HEDIS security review without rework.
How does FHIR R4 integration work in practice?
FHIR R4 integration means ingesting and emitting clinical resources (Patient, Encounter, Observation, Condition, MedicationRequest, and others) in the HL7 FHIR R4 format, often gated by SMART-on-FHIR OAuth2 scopes. In practice we map vendor EHR exports, write conformant resources to a partner endpoint, validate against profiles like USCDI v3, and log every state change for audit. The work is more interoperability and conformance than raw API work.
What does TEFCA QHIN connectivity require?
TEFCA (Trusted Exchange Framework and Common Agreement) defines how Qualified Health Information Networks (QHINs) exchange data nationally. Connecting requires implementing the QHIN Technical Framework, certificate-based mutual authentication, query and message exchange flows, and consent scoping that holds up under info-blocking review. We have shipped TEFCA-bound integrations and the audit logs that pass external scrutiny.
How do you handle HIPAA-aware development?
We work under a Business Associate Agreement on the customer paper, sign the BAA your legal team uses, and apply the safeguards required of business associates: audit logs on state-changing operations, tokenized access without shared admin credentials, encryption in transit and at rest, least-privilege developer access removed within one business day of engagement end, and synthetic or anonymized data on developer machines. Our shipped integrations have passed external HIPAA security reviews.

Selected work in healthcare integration development

CASE 01 / Healthcare · web

Multi-clinic web platform

Multi-tenant website framework for healthcare clinics. Appointment widgets, doctor profiles, secure intake forms, multilingual content, ADA-compliant components. Each clinic gets its own subdomain and branded theme on a ...

Next.js · headless · Twilio · ADA View case
CASE 02 / Healthcare · interop

FHIR · TEFCA · USCDI integration

FHIR R4 ingestion and emission against EHR partners. SMART-on-FHIR auth, USCDI v3 data classes, TEFCA QHIN handshake, info-blocking-compliant access logs, consent scoping baked into the audit trail....

FHIR R4 · SMART · OAuth2 · TEFCA View case
CASE 03 / Healthcare · pipeline

HEDIS measurement pipeline

Many Windows background services managing the document and claim flow that produces HEDIS measurements. Fax gateway intake, insurance portal sync, document classification and routing, normalization, retry queues, stuck-o...

.NET · MSSQL · NewRelic · HEDIS View case
CASE 04 / Healthcare · agents

Clinical document watcher

File-system monitoring agents at provider endpoints across many sites, sister system to the document pipeline above. Picks up signed documents, classifies, OCRs, pushes to a central store with chain-of-custody logging. R...

.NET · OCR · S3 · audit log View case
CASE 06 / AI · pipeline

Image classify and OCR pipeline

High-volume image ingestion, normalization, and classification. Variable-batch worker pool, GPU-aware scheduling, OCR fallback, structured extraction routed downstream to a clinical data sink. Survives bursty load withou...

Python · GPU workers · S3 View case
CASE 08 / Growth · SEO

Healthcare SEO program

Technical SEO for clinical sites. Schema markup (MedicalClinic, Physician, Service, MedicalProcedure), Core Web Vitals optimization, JSON-LD for providers and locations, multilingual hreflang, content velocity playbook, ...

Next.js · schema.org · GSC · Ahrefs View case
CASE 12 / Healthcare · imaging

Scan and fax image enhancement

Server-side enhancement pipeline for medical scans and inbound faxes. Deskew, denoise, contrast normalization, OCR-readability scoring, automatic re-processing on poor inputs. Recovers documents that the scanner or the f...

.NET · OCR · imaging · ML View case
CASE 13 / Healthcare · ETL

Document reformat at scale

Cross-format conversion pipeline for clinical document corpora. Single inputs running into tens of thousands of pages, transformed across PDF, TIFF, DOCX, structured XML, and clinical CDA. Memory-bounded streaming, faith...

Python · streaming · CDA · PDF View case
CASE 14 / Healthcare · mobile

Mobile medication selector

Patient-facing iOS and Android app for guided medication selection. Indication search, contraindication and interaction checks against the patient profile, OTC versus Rx routing, pharmacy locator, secure favorites. Built...

React Native · FHIR · Mapbox View case
CASE 20 / Healthcare · multilingual

Multilingual clinic platform

Web platform for a private multi-location medical center serving the Eastern European diaspora. Polish, Ukrainian, Russian content with i18n routing, multi-step appointment wizard wired to an external booking API, doctor...

React · Vite · Express · i18next · external booking API View case
CASE 21 / Healthcare · reporting

Automated medical reporting

Branded PDF report generator for clinical workflows. Templated layouts, dynamic charts, signature blocks, batch generation against patient cohorts, locale-aware content, integration with downstream document distribution....

.NET · PDF · LeadTools · MSSQL View case
CASE 22 / Healthcare · secure delivery

HIPAA audited file proxy

Authenticated file delivery service for clinical documents. Tokenized download URLs, scope-bound access, full audit trail, virus scanning, configurable retention, integration with EHR and partner systems. Passed an exter...

.NET · token auth · audit log View case
CASE 23 / Healthcare · data systems

Clinical data warehouse

Long-running clinical data system with a fleet of background services. Patient, encounter, and claim records normalized with history, ETL batches against external partners, stored procedures for analytics teams, read-onl...

.NET · MSSQL · Windows services · ETL View case
CASE 24 / Healthcare · API hub

Clinical data aggregation hub

API hub aggregating multiple clinical data sources behind a single read-friendly contract. Typed C# client SDK shipped to downstream services, schema-versioned endpoints, request budgeting, request-level audit. Lets inte...

.NET · ASP.NET Core · typed SDK View case

Tell us about your healthcare integration.

HEDIS pipeline, FHIR exchange, document ingestion, or audit-grade infrastructure that someone forgot to maintain. We respond within one business day.

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