Hayden Consulting Group is a strategy and analytics consultancy serving life sciences companies, specializing in market access and patient services. It advises biopharmaceutical clients on payer, reimbursement and affordability challenges, work the firm markets under an offering it brands Access Forward. Its headquarters are at 99 Chauncy Street in Boston, with a second office in New York. Co-founders Jamie Sidore and David MacDougall serve as Managing Directors.

BGB Group acquired Hayden on 7 January 2026. The firm continues to be led by its co-founders within BGB's Strategic Advisory practice, and its website now describes it as having joined BGBx Consulting.