Help raise valuable support for the Center for Community Health Improvement and share its work. Start your fundraising campaign. Create a fundraising page in just 5 minutes. Mass General is a 501(c)3 nonprofit organization and depends on the support of the public. All donations are tax-deductible to the full extent of the law. Our nonprofit tax ID is 04-1564655. Questions about giving? Please see our Frequently Asked Questions or contact us.