Leave a Legacy: Remembering Home Base in your long-term plans extends your impact well into the future. Learn more about making plans today for a future gift or call 617-726-2200 to discuss creative ways to give.Mass General is a 501(c)3 non-profit organization and depends on the support of the public. All donations are tax-deductible to the full extent of the law. Our non-profit tax ID is 04-1564655. Questions about giving? Please see our Frequently Asked Questions or contact us.