diff --git a/packages/terra-clinical-onset-picker/CHANGELOG.md b/packages/terra-clinical-onset-picker/CHANGELOG.md
index 65e4412d0..159daf398 100644
--- a/packages/terra-clinical-onset-picker/CHANGELOG.md
+++ b/packages/terra-clinical-onset-picker/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 ## Unreleased
 
+* Changed
+  * Renamed year select min-width css variable for the fusion theme to not be overridden by the same name variable coming from deprecated orion-fusion-theme package.
+
 ## 4.39.0 - (April 2, 2024)
 
 * Changed
diff --git a/packages/terra-clinical-onset-picker/src/OnsetPicker.module.scss b/packages/terra-clinical-onset-picker/src/OnsetPicker.module.scss
index 95cdd898b..fa0ba4b1f 100644
--- a/packages/terra-clinical-onset-picker/src/OnsetPicker.module.scss
+++ b/packages/terra-clinical-onset-picker/src/OnsetPicker.module.scss
@@ -46,6 +46,6 @@
   }
 
   .year {
-    min-width: var(--terra-clinical-onset-picker-year-select-min-width, 5.5em);
+    min-width: var(--terra-clinical-onset-picker-calendar-year-select-min-width, 5.5em);
   }
 }
diff --git a/packages/terra-clinical-onset-picker/src/clinical-lowlight-theme/OnsetPicker.module.scss b/packages/terra-clinical-onset-picker/src/clinical-lowlight-theme/OnsetPicker.module.scss
index 5dbb8645f..fa2144fe5 100644
--- a/packages/terra-clinical-onset-picker/src/clinical-lowlight-theme/OnsetPicker.module.scss
+++ b/packages/terra-clinical-onset-picker/src/clinical-lowlight-theme/OnsetPicker.module.scss
@@ -7,6 +7,6 @@
     --terra-clinical-onset-picker-granularity-select-min-width: 7em;
     --terra-clinical-onset-picker-month-select-min-width: 10.5em;
     --terra-clinical-onset-picker-age-granularity-select-min-width: 7em;
-    --terra-clinical-onset-picker-year-select-min-width: 5.5em;
+    --terra-clinical-onset-picker-calendar-year-select-min-width: 5.5em;
   }
 }
diff --git a/packages/terra-clinical-onset-picker/src/orion-fusion-theme/OnsetPicker.module.scss b/packages/terra-clinical-onset-picker/src/orion-fusion-theme/OnsetPicker.module.scss
index 55c39a7b2..a385d8a41 100644
--- a/packages/terra-clinical-onset-picker/src/orion-fusion-theme/OnsetPicker.module.scss
+++ b/packages/terra-clinical-onset-picker/src/orion-fusion-theme/OnsetPicker.module.scss
@@ -7,6 +7,6 @@
     --terra-clinical-onset-picker-granularity-select-min-width: 8rem;
     --terra-clinical-onset-picker-month-select-min-width: 10rem;
     --terra-clinical-onset-picker-age-granularity-select-min-width: 8rem;
-    --terra-clinical-onset-picker-year-select-min-width: 6rem;
+    --terra-clinical-onset-picker-calendar-year-select-min-width: 6rem;
   }
 }