EHR Software Development
Interoperable Electronic Health Record Platforms Built for Cross-Provider Care
Halkwinds builds Electronic Health Record platforms engineered for data that moves — HL7 FHIR interoperability, health information exchange connectivity, and longitudinal patient records that follow the patient across hospitals, specialists, and care settings.
Enterprise Challenges
Challenges We Solve
Interoperability Across Disparate Provider Systems
Hospitals, specialists, labs, and post-acute providers run on different EHR vendors with inconsistent data models. Platforms that cannot normalise and exchange data across this landscape fragment the patient record.
Health Information Exchange Participation
Joining Carequality, CommonWell, or a regional HIE requires FHIR conformance testing, trust framework agreements, and query/retrieve infrastructure most vendors underestimate at the proposal stage.
ONC Certification and Cures Act Compliance
EHR platforms intended for cross-organisation use face ONC Health IT Certification requirements under the 2015 Edition Cures Update, including USCDI data classes and standardised API access.
Longitudinal Record Reconciliation and Patient Matching
Merging records for the same patient across organisations without a reliable master patient index produces duplicate charts, missed allergies, and fragmented medication histories.
Information Blocking Rule Compliance
The 21st Century Cures Act information blocking provisions require timely, standards-based data access for patients and providers — with narrow, well-documented exceptions that must be built into workflow logic.
Cross-Organisation Consent and Data Governance
Sharing records across independent organisations requires consent models, data use agreements, and access controls that go beyond a single practice's internal governance.
What We Deliver
Core Capabilities
HL7 FHIR R4 API Architecture
FHIR-native data layer exposing Patient, Encounter, Observation, and Condition resources through standards-based RESTful APIs for cross-organisation consumption.
Master Patient Index and Record Matching
Probabilistic and deterministic patient matching algorithms reconciling identities across source systems to produce a single longitudinal record per patient.
Health Information Exchange Connectivity
Integration with Carequality, CommonWell, and regional HIEs for query-based and directed document exchange, including XCA and XCPD transaction support.
ONC Certification Program Support
USCDI data class mapping, standardised API testing, and certification test procedure preparation aligned with the 2015 Edition Cures Update criteria.
Cross-Organisation Clinical Document Exchange
C-CDA generation and consumption for continuity of care documents, referral summaries, and transition-of-care records exchanged between independent provider organisations.
Care Coordination Across Referral Networks
Shared care plans, referral tracking, and closed-loop communication workflows spanning primary care, specialists, and facilities outside a single organisation's walls.
Consent and Data-Sharing Governance
Granular consent management, data use agreement enforcement, and audit logging for every cross-organisation data access — meeting information blocking exception requirements.
Longitudinal Patient Timeline Aggregation
Unified clinical timelines aggregating encounters, medications, labs, and diagnoses from every contributing organisation into a single chronological patient view.
Enterprise Use Cases
In Production
Regional Health Information Exchange Rollout
Challenge
12-hospital regional network with no shared patient record, producing duplicate testing and an estimated $8.4M in avoidable redundant imaging annually.
Solution
FHIR-native HIE platform connecting all 12 hospitals plus 200+ affiliated clinics, with master patient index reconciliation and real-time query/retrieve document exchange.
Outcome
Redundant imaging reduced 38%. Care team record access time reduced from 20 minutes to under 90 seconds. $3.1M annual savings from reduced duplicate testing.
ACO Cross-Provider Care Coordination Platform
Challenge
ACO managing 92,000 attributed lives across 260 independently owned practices with no shared visibility into care gaps or specialist referral outcomes.
Solution
Interoperable care coordination platform aggregating claims and clinical data via FHIR from all participating practices, with shared care plans and referral loop closure tracking.
Outcome
Referral loop closure improved from 54% to 89%. Preventable ED utilisation reduced 22%. Shared savings performance improved across two consecutive performance years.
Multi-Specialty Referral Network Interoperability
Challenge
Independent specialty network with 40 practices on 6 different EHR vendors, causing referral summaries to be faxed and manually re-entered.
Solution
FHIR-based referral and C-CDA exchange layer connecting all 6 EHR vendors, replacing fax-based transitions with structured, standards-based document exchange.
Outcome
Manual re-entry eliminated for 94% of referrals. Average referral turnaround reduced from 6 days to 14 hours.
Master Patient Index Remediation
Challenge
Health system with an estimated 11% duplicate patient record rate across merged legacy systems, creating medication reconciliation and safety risks.
Solution
Probabilistic patient matching engine reprocessing 1.4M historical records, with a governed manual review workflow for high-uncertainty matches.
Outcome
Duplicate record rate reduced to 0.8%. Medication reconciliation errors attributable to duplicate charts reduced 91%.
Payer-Provider Value-Based Data Exchange
Challenge
Health plan and provider group needing bidirectional clinical and claims data exchange to support a shared-risk value-based contract without a common data platform.
Solution
FHIR-based bidirectional exchange layer sharing risk adjustment data, care gap alerts, and quality measure data between payer and provider systems in near real time.
Outcome
Quality measure reporting cycle reduced from 45 days to 3 days. Risk adjustment accuracy improved, reducing settlement disputes by 62%.
ONC Certification for a Multi-Tenant EHR Platform
Challenge
Health technology company building a multi-tenant EHR product for independent practices needing ONC 2015 Edition Cures Update certification to be viable in the market.
Solution
USCDI-aligned data architecture, standardised FHIR API layer, and certification test procedure execution across all required certification criteria.
Outcome
Certification achieved on first submission across all tested criteria. Product became eligible for Promoting Interoperability incentive program participation by customers.
Industry Applications
Across Sectors
Hospital Systems and Integrated Delivery Networks
Enterprise EHR interoperability layers connecting owned and affiliated facilities into a single longitudinal patient record with HIE and referral network connectivity.
Accountable Care Organisations
Cross-provider care coordination and data exchange platforms supporting shared savings performance, quality reporting, and closed-loop referral management.
Health Information Exchanges
HIE infrastructure development including query/retrieve architecture, master patient index services, and participant onboarding for regional and statewide exchanges.
Multi-Specialty Provider Networks
Referral and care coordination interoperability across independently owned specialty practices operating on different EHR vendors.
Government and Public Health Agencies
Standards-based clinical data exchange for public health reporting, immunisation registries, and case management requiring cross-jurisdiction interoperability.
Health Technology Platform Companies
ONC-certifiable, FHIR-native EHR product architecture for health tech companies building multi-tenant platforms sold to independent practices and networks.
How We Deliver
Delivery Process
Interoperability and Compliance Discovery
Assessment of participating organisations, source EHR vendors, HIE participation requirements, and ONC certification scope — producing a data governance and integration roadmap.
Master Patient Index and Data Model Design
Patient matching algorithm design and FHIR resource modelling aligned with USCDI data classes, establishing the foundation for a reliable longitudinal record.
FHIR API and Exchange Layer Development
Development of FHIR R4 APIs, C-CDA document generation, and HIE transaction support, tested against Carequality and CommonWell conformance requirements.
Certification and HIE Connectivity
ONC certification test procedure execution where required, alongside live connectivity testing with HIE partners and participating provider organisations.
Cross-Organisation User Acceptance Testing
UAT conducted across every participating organisation type — hospital, specialist, and payer stakeholders — validating data accuracy and workflow fit before go-live.
Phased Go-Live and Governance Monitoring
Staged onboarding of participating organisations with data exchange volume monitoring, consent compliance auditing, and ongoing governance committee reporting.
Why Halkwinds
Halkwinds vs. Your Other Options
An honest comparison. Every org has these four options — here's how they stack up for ehr software development.
| Dimension | Halkwinds | Large SI
(Accenture / TCS) | Freelancer
/ Agency | Build
In-House |
|---|---|---|---|---|
| Time to start | < 2 weeks | 8–16 weeks (procurement, MSA, SOW) | 1–3 days | 3–6 months to hire & onboard |
| Senior-only engineers | 5+ years minimum | Juniors on most project layers | Varies — no guarantee | Depends on hiring budget |
| Cost transparency | Fixed monthly or project price | Change orders, hidden overheads | Scope creep common | Salary + benefits + tooling + office |
| Full-stack accountability | One team, one SLA | Multiple vendors, finger-pointing risk | Single skill, no cross-discipline ownership | If team is complete |
| IP & code ownership | 100% assigned to client from day 1 | Contractually complex — review carefully | Depends on contract terms | Full ownership |
| AI & cloud-native expertise | Production LLMs, Kubernetes, multi-cloud | Available but expensive to staff | Niche — hard to find | Expensive, high attrition in AI talent |
| Scales up or down quickly | 2-week ramp up/down | Long contract commitments | But context loss on re-engagement | Headcount freezes, hiring lag |
| Compliance-ready (SOC2, HIPAA) | Security pack available on request | Certified — but costs more | Rarely documented | Requires investment in tooling + audit |
Time to start
Halkwinds
< 2 weeks
Large SI (Accenture / TCS)
8–16 weeks (procurement, MSA, SOW)
Freelancer / Agency
1–3 days
Build In-House
3–6 months to hire & onboard
Senior-only engineers
Halkwinds
5+ years minimum
Large SI (Accenture / TCS)
Juniors on most project layers
Freelancer / Agency
Varies — no guarantee
Build In-House
Depends on hiring budget
Cost transparency
Halkwinds
Fixed monthly or project price
Large SI (Accenture / TCS)
Change orders, hidden overheads
Freelancer / Agency
Scope creep common
Build In-House
Salary + benefits + tooling + office
Full-stack accountability
Halkwinds
One team, one SLA
Large SI (Accenture / TCS)
Multiple vendors, finger-pointing risk
Freelancer / Agency
Single skill, no cross-discipline ownership
Build In-House
If team is complete
IP & code ownership
Halkwinds
100% assigned to client from day 1
Large SI (Accenture / TCS)
Contractually complex — review carefully
Freelancer / Agency
Depends on contract terms
Build In-House
Full ownership
AI & cloud-native expertise
Halkwinds
Production LLMs, Kubernetes, multi-cloud
Large SI (Accenture / TCS)
Available but expensive to staff
Freelancer / Agency
Niche — hard to find
Build In-House
Expensive, high attrition in AI talent
Scales up or down quickly
Halkwinds
2-week ramp up/down
Large SI (Accenture / TCS)
Long contract commitments
Freelancer / Agency
But context loss on re-engagement
Build In-House
Headcount freezes, hiring lag
Compliance-ready (SOC2, HIPAA)
Halkwinds
Security pack available on request
Large SI (Accenture / TCS)
Certified — but costs more
Freelancer / Agency
Rarely documented
Build In-House
Requires investment in tooling + audit
Ready to see if Halkwinds is the right fit?
A 30-minute call is enough to scope your project, validate our fit, and agree on a starting point — no commitment required.
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FAQ
Common Questions
EMR is the internal digital chart used by a single practice for its own documentation, scheduling, and billing. EHR is designed to be shared and exchanged across multiple organisations — hospitals, specialists, labs, and HIEs — using standards like HL7 FHIR so the record follows the patient.
Yes. We architect EHR platforms to USCDI data class requirements and standardised API criteria, and support certification test procedure execution under the 2015 Edition Cures Update for platforms requiring it.
Yes. We build FHIR-based and XCA/XCPD-compliant connectivity to Carequality, CommonWell, and regional HIEs, including conformance testing and trust framework onboarding.
We implement probabilistic and deterministic matching algorithms with governed manual review workflows for high-uncertainty matches, targeting duplicate record rates below 1%.
Single-organisation interoperability layers typically range from $300,000 to $700,000. Multi-organisation HIE-scale platforms with certification support range from $900,000 to $2.5M or more depending on participant count.
A core FHIR interoperability layer for a single organisation typically deploys in 16–20 weeks. Multi-organisation HIE platforms with certification and multi-party UAT range from 28–44 weeks.
We build timely, standards-based data access into the platform by default and implement the documented workflow logic required to apply the narrow information blocking exceptions where they legitimately apply.
Yes. Interoperability platforms are designed to sit alongside and exchange data with Epic, Cerner, Meditech, and other incumbent systems rather than replace them.
Work With Halkwinds
Build an EHR Platform Designed to Share Data, Not Trap It
Halkwinds architects interoperable EHR platforms with FHIR-native data layers, HIE connectivity, and certification support built in from the first design decision.
Architecture. Engineering. Scale. — Built by Halkwinds Product Engineering.