Preheat oven to 350 F. Line baking sheets with parchment paper for easy clean-up, if desired.
In a large bowl whisk together flour, oats, baking soda, salt, cinnamon, nutmeg and ginger; set aside.
In the bowl of an electric stand mixer fitted with the paddle attachment, whip together butter, brown sugar, and granulated sugar until creamy, occasionally scraping down the sides, as needed. To the butter and sugar, add the egg and mix until incorporated. Add vanilla extract and pumpkin puree; incorporate an additional 30-60 seconds on medium speed.
With mixer set on low speed, slowly add in dry ingredients and mix until combined. Mix in chocolate chips.
Scoop dough in 2 tablespoons heaps onto the prepared baking sheets, spacing cookies 2-inches apart. Bake in preheated oven 12-14 minutes. Allow to cool on baking sheet several minutes then transfer to a wire rack to cool completely. Store in an airtight container.