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.

Healthcare integration is the engineering work most dev shops decline. FHIR R4 conformance, TEFCA QHIN handshakes, HEDIS measurement pipelines, HIPAA audit trails: each one carries regulatory consequences if it breaks or fails an external review. We have shipped these systems and stood behind them through the audits.

If your integration failed an info-blocking review, your HEDIS pipeline cannot reproduce its own output, or you are standing up a new TEFCA connection against a hard deadline, those are the conversations we are built for. One of our shipped integrations passed external info-blocking review without remediation. Our HEDIS pipeline reproduces every submission from raw inputs to final measure on demand.

Our healthcare integration development practice spans FHIR R4 and SMART-on-FHIR, TEFCA QHIN connectivity, USCDI v3 data classes, HEDIS measurement reporting, clinical document watchers, medical OCR and classification at scale, HL7 ingestion, multilingual clinic platforms, HIPAA-aware file delivery, and patient-facing native mobile applications. The audit trail comes baked in, not bolted on.

We are a generalist studio with a deep healthcare practice. Direct contracts under your BAA. No subcontracting. Cases below are anonymized but real. Names and specifics after a call.

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 Next.js framework that launches ADA-compliant, HIPAA-aware clinic websites from one shared codebase. Each location gets its own subdomain, branded theme, appointment widgets, and secure intake forms without ...

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

FHIR · TEFCA · USCDI integration

Production FHIR R4 server covering 42 resource types, SMART on FHIR v2.1 with PKCE, TEFCA QHIN handshake against Epic Nexus and CommonWell, and a tamper-evident audit chain scoped to the Consent that authorized each read...

FHIR R4 · SMART v2.1 · TEFCA · USCDI v3 · Da Vinci · CARIN BB · US Core View case
CASE 03 / Healthcare · pipeline

HEDIS measurement pipeline

HEDIS measurement pipeline built on .NET Windows services: fax intake, insurance portal sync, document classification, retry queues, and Slack-native incident routing tied to stuck-order diagnostics. HEDIS submissions re...

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

Clinical document watcher

Fleet of .NET clinical document watcher agents running unattended at provider endpoints. Each agent detects signed documents, OCRs where needed, and pushes to a central store with chain-of-custody hashing. Buffers locall...

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

Image classify and OCR pipeline

High-volume image classification and OCR pipeline with GPU-aware batch scheduling and a variable worker pool. Structured clinical data extracts route downstream with content-hash deduplication. Survives bursty load witho...

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

Healthcare SEO program

Technical SEO program for clinical sites. JSON-LD schema markup for MedicalClinic, Physician, Service, and MedicalProcedure, Core Web Vitals optimization, hreflang for multilingual content, and GSC instrumentation that s...

Next.js · schema.org · GSC · Ahrefs View case
CASE 11 / Healthcare · imaging

Scan and fax image enhancement

Server-side enhancement pipeline for medical document imaging. Deskews, denoises, and normalizes contrast on scans and inbound faxes, then scores OCR readability before any document reaches the clinical record. Persisten...

.NET · OCR · imaging · ML View case
CASE 12 / Healthcare · ETL

Document reformat at scale

Memory-bounded streaming pipeline that converts clinical document corpora across PDF, TIFF, DOCX, structured XML, and clinical CDA. Structure survives format hops. Every transformation step writes an audit record with in...

Python · streaming · CDA · PDF View case
CASE 13 / Healthcare · mobile

Mobile medication selector

Patient-facing iOS and Android medication selector app built for a real symptomatic moment. Indication search, drug interaction and contraindication checks against the FHIR-backed patient profile, OTC versus Rx routing, ...

React Native · FHIR · Mapbox View case
CASE 19 / Healthcare · multilingual

Multilingual clinic platform

Multilingual web platform for a private multi-location medical center serving the Eastern European diaspora. i18n routing in Polish, Ukrainian, and Russian, a multi-step appointment wizard wired to an external booking AP...

React · Vite · Express · i18next · external booking API View case
CASE 20 / Healthcare · reporting

Automated medical reporting

Branded PDF report generator for clinical workflows. Templated layouts, dynamic chart binding, signature blocks, batch generation against patient cohorts, locale-aware content, and a downstream distribution integration. ...

.NET · PDF · LeadTools · MSSQL View case
CASE 21 / Healthcare · secure delivery

HIPAA audited file proxy

Authenticated HIPAA-compliant file delivery proxy for clinical documents. Tokenized URLs scoped to one document, one recipient, and one time window. Virus scanning before delivery, configurable retention per partner, ful...

.NET · token auth · audit log View case
CASE 22 / Healthcare · data systems

Clinical data warehouse

Long-running clinical data warehouse on MSSQL. Patient, encounter, and claim records normalized with full history, idempotent ETL batches against external partners, code-managed stored procedures, and read-only replicas ...

.NET · MSSQL · Windows services · ETL View case
CASE 23 / Healthcare · API hub

Clinical data aggregation hub

API hub aggregating multiple clinical data sources behind a single read-friendly contract for internal teams. Typed C# SDK shipped to consumers, schema-versioned endpoints, per-request budgeting, and audit logging so com...

.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.