diff --git a/changelog.d/restore-medical-oop-expenses-alias.added.md b/changelog.d/restore-medical-oop-expenses-alias.added.md
new file mode 100644
index 00000000000..f77fd05ee46
--- /dev/null
+++ b/changelog.d/restore-medical-oop-expenses-alias.added.md
@@ -0,0 +1 @@
+Restore `medical_out_of_pocket_expenses` as a deprecation alias that forwards into `other_medical_expenses`, easing migration from the variable removed in 1.673.0. The alias is documented as deprecated and will be removed in a future release.
diff --git a/policyengine_us/tests/policy/baseline/household/expense/health/medical_out_of_pocket_expenses.yaml b/policyengine_us/tests/policy/baseline/household/expense/health/medical_out_of_pocket_expenses.yaml
new file mode 100644
index 00000000000..ebf80fe6e34
--- /dev/null
+++ b/policyengine_us/tests/policy/baseline/household/expense/health/medical_out_of_pocket_expenses.yaml
@@ -0,0 +1,22 @@
+- name: Legacy medical_out_of_pocket_expenses input flows into other_medical_expenses.
+  period: 2025
+  input:
+    medical_out_of_pocket_expenses: 1_000
+  output:
+    other_medical_expenses: 1_000
+
+- name: Direct other_medical_expenses input overrides the legacy alias.
+  period: 2025
+  input:
+    medical_out_of_pocket_expenses: 1_000
+    other_medical_expenses: 250
+  output:
+    other_medical_expenses: 250
+
+- name: Legacy alias defaults to zero when not supplied.
+  period: 2025
+  input:
+    age: 30
+  output:
+    medical_out_of_pocket_expenses: 0
+    other_medical_expenses: 0
diff --git a/policyengine_us/variables/household/expense/health/medical_out_of_pocket_expenses.py b/policyengine_us/variables/household/expense/health/medical_out_of_pocket_expenses.py
new file mode 100644
index 00000000000..d69d336bbac
--- /dev/null
+++ b/policyengine_us/variables/household/expense/health/medical_out_of_pocket_expenses.py
@@ -0,0 +1,17 @@
+from policyengine_us.model_api import *
+
+
+class medical_out_of_pocket_expenses(Variable):
+    value_type = float
+    entity = Person
+    label = "Medical out-of-pocket expenses (deprecated)"
+    unit = USD
+    definition_period = YEAR
+    documentation = (
+        "DEPRECATED. Removed in 1.673.0 and restored as a temporary "
+        "alias to ease migration. Values supplied here are forwarded "
+        "into `other_medical_expenses`. Migrate to `other_medical_expenses` "
+        "for non-premium medical spending and to `health_insurance_premiums` "
+        "if your value previously included health insurance premiums. "
+        "This alias will be removed in a future release."
+    )
diff --git a/policyengine_us/variables/household/expense/health/other_medical_expenses.py b/policyengine_us/variables/household/expense/health/other_medical_expenses.py
index a882a586b7e..15f2ff30900 100644
--- a/policyengine_us/variables/household/expense/health/other_medical_expenses.py
+++ b/policyengine_us/variables/household/expense/health/other_medical_expenses.py
@@ -8,3 +8,4 @@ class other_medical_expenses(Variable):
     unit = USD
     definition_period = YEAR
     uprating = "calibration.gov.hhs.cms.moop_per_capita"
+    adds = ["medical_out_of_pocket_expenses"]