diff --git a/README.md b/README.md
index 90fc0b2..b9a1181 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,46 @@
++⚠️ **Repository Archived – MedTech OSS**
+
+`Status: Archived as of April 13, 2026`
+
+
+This repository is part of the open-source assets associated with the Microsoft MedTech service. The MedTech service has been formally deprecated, and there are no remaining active customers using the service. As a result, this repository is no longer maintained and has been archived to prevent confusion for customers and the broader open-source community.
+
+As of **April 13, 2026**, this open-source repository has been archived and will not receive updates, bug fixes, or security patches. Microsoft recommends that customers evaluate currently supported Azure Health Data Services capabilities for device data interoperability and transformation scenarios.
+
+**Why this repository is being archived**
+
+Following the deprecation of the MedTech service and the completion of customer transitions away from the platform, Microsoft has made the decision to discontinue ongoing maintenance of associated open-source repositories. Continuing to host these projects as active may create the impression of ongoing support or recommended usage, which is no longer accurate.
+
+
+**Important dates**
+
+- May 3, 2025 – Initiation of MedTech service deprecation and prevention of new instance creation
+- April 13, 2026 – Archival of this open-source repository
+
+**Acknowledgements**
+
+We would like to sincerely thank the community of contributors, collaborators, and customers who engaged with this project over time. Your feedback, issue reports, documentation improvements, and code contributions helped shape the evolution of device data interoperability solutions within Microsoft’s healthcare ecosystem.
+
+**What’s next?**
+
+Microsoft continues to invest in healthcare interoperability, cloud-native data platforms, and AI-powered transformation services across Azure Health Data Services and related offerings. Future innovation in this space is being delivered through actively supported Microsoft healthcare platform capabilities.
+To learn more about current Microsoft healthcare interoperability solutions, please refer to:
+
+- [ Azure Health Data Services](https://learn.microsoft.com/en-us/azure/healthcare-apis/)
+- [FHIR service in Azure Health Data Services](https://learn.microsoft.com/en-us/azure/healthcare-apis/fhir/)
+- Community discussions on https://stackoverflow.com/questions/tagged/azure-health-data-services
+
+**Archived content disclaimer**
+
+The content in this repository is no longer actively maintained and may be out of date or no longer accurate. Dependencies, APIs, deployment models, or referenced services may have changed since the time of last update.
+
+⚠️ **Security Notice:**
+
+Archived repositories do not receive security updates, bug fixes, or compatibility improvements. Use of this code in production environments may introduce security or operational risks. Microsoft recommends against deploying or relying on archived repositories in active workloads.
+
+
+**The original README content has been preserved below for historical reference.**
+
 # IomtFhirClient Swift Library
 
 [![Build Status](https://microsofthealth.visualstudio.com/Health/_apis/build/status/POET/IomtFhirClient_Daily?branchName=master)](https://microsofthealth.visualstudio.com/Health/_build/latest?definitionId=436&branchName=master)