Lloyd Mckenzie
Chief Standards Officer at Office of the National Coordinator for Health Information Technology
St. Albert, Alberta, Canada
Summary
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SeniorLloyd Mckenzie is a seasoned information architect and Chief Standards Officer with nearly two decades of deep expertise in HL7 data modeling, HL7 V2/V3 design, and FHIR implementation. He blends hands-on Java back-end development—contributing to core HL7 FHIR repositories and conversion code—with high-level standards facilitation at HL7 and consulting roles for organizations like the ONC and FDA. Lloyd is known for translating complex clinical data models into practical, interoperable implementations and for teaching and harmonizing version-3 modeling across committees. Based in St. Albert, Alberta, he runs LM&A Consulting while shaping national projects such as Structured Data Capture and Data Access Framework, demonstrating both technical depth and policy-facing influence. An energetic communicator and educator, he often surfaces subtle model-conversion pitfalls in live codebases, making standards adoption smoother for implementers.
10 years of coding experience
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (10)
smart-on-fhir10
javas10
data-conversion10
hl7-fhir10
java10
data-modeling9
xml9
apidoc7
json7
api7
Programming languages (16)
Github contributions (5)
HL7/fhir
Oct 2018 - Dec 2022
Official source for the HL7 FHIR Specification
Role in this project:
Back-end Developer
Back-end DeveloperContributions:315 reviews, 430 commits, 300 PRs in 4 years 2 months
Contributions summary:Lloyd's contributions primarily focused on modifying Java code within the `org.hl7.fhir.convertors` package, indicating work on data conversion and potentially version migration. The changes involved modifying files like `CountryCodesConverter.java` and integrating with the codebase, including adding and refining the transformation of data models. The commits demonstrate the user's work on the core infrastructure of the HL7 FHIR project.
hl7-fhirfhir
hapifhir/org.hl7.fhir.core
Feb 2019 - Nov 2022
Role in this project:Back-end Developer
Back-end DeveloperContributions:13 reviews, 56 commits, 82 PRs in 3 years 9 months
Contributions summary:Lloyd primarily contributed to the development and maintenance of the HL7 FHIR core library, with a focus on data structures, data type rendering, and value set expansion. Their work involved modifying data models, enhancing rendering capabilities for data types (like quantities and ranges), and improving the handling of value set expansions for correct code system lookups. They also implemented code to handle conversion between different FHIR versions and refactoring XML escaping.
fhir
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