What code should be reported for a 35-year-old female undergoing gastric restriction with partial gastrectomy?

The correct code for a gastric restriction procedure with partial gastrectomy is based on the specifics of the procedure performed. Code 43845 is designated for an open partial gastrectomy with gastric restriction performed for the treatment of obesity. This procedure typically involves removing a portion of the stomach and is performed to limit food intake, thus facilitating weight loss.

In this context, the terminology of "gastric restriction" indicates that the procedure is aimed at reducing the size of the stomach to decrease its capacity, which aligns with the definition and application of code 43845. The procedure focuses not only on the surgical technique of partial gastrectomy but also includes the intention for obesity treatment, making this code the most appropriate choice.

The other codes listed correspond to different variations or specifics of the surgical procedures that do not match the description of gastric restriction combined with a partial gastrectomy in this scenario, hence they are not applicable for the situation described.