The LEED for Existing Buildings: Operations & Maintenance (LEED EB: O&M) rating system includes a credit category called Materials and Resources (MR). Under this category, there is a credit called "Sustainable Purchasing - Ongoing Consumables" (MR Credit 1). This credit covers product purchases for the building and areas within the site manager's control. One of the criteria for this credit is that food and beverages must be labeled USDA Organic1. Therefore, a USDA organic food product would qualify under this credit.
References:
* LEED Requirements: Meet the Prerequisites
* Policy 8-105 Sustainability Purchasing Policy
* EBOM-v4 MRc1: Purchasing - ongoing