Preheat oven to 350°.
Combine flour, oats, baking soda, cinnamon, and salt.
Cream butter and gradually add the sugars, beating until light and fluffy.
Add egg and vanilla, mixing well.
Alternate additions of the dry ingredients and the pumpkin, mixing well after each addition.
Stir in chocolate chips. Drop by teaspoonfuls onto a silicone mat or parchment paper on a cookie sheet.
Bake at 350° for 10-15 minutes or until firm and lightly browned.
Let cool for 5 minutes.
Remove from cookie sheet and cool on a wire rack.