diff --git a/schema/extensions.md b/schema/extensions.md
index 9a70bc47..88233d58 100644
--- a/schema/extensions.md
+++ b/schema/extensions.md
@@ -7,5 +7,6 @@ The purpose of this file is to keep track of and avoid collisions in Extension
 | ----------------------------------- | ---- | ------- | ---------------------------------------- |
 | Development                         | dev  | **999** | The development (TODO) schema extensions |
 | Example                             | example | **998** | Reference extension, see `schema/extensions/example` |
+| Clinical Agent Assurance            | caaf | **240** | Clinical agent assurance for health AI   |
 | _Native Extensions defined in OASF_ |
 |                                     |      |         |                                          |