--- a
+++ b/deidentify/surrogates/generators/age.py
@@ -0,0 +1,16 @@
+import re
+
+from .base import ExactMatchGenerator
+
+AGE_REGEX = re.compile(r'\d+')
+
+class AgeSurrogates(ExactMatchGenerator):
+
+    def replace_one(self, annotation):
+        for match in AGE_REGEX.finditer(annotation):
+            age = int(match.group(0))
+            if age > 89:
+                age = 89
+                annotation = re.sub(match.group(0), str(age), annotation)
+
+        return annotation