Complete guide to vendor credentialing requirements for Mass General Brigham facilities. Learn which platform they use, what documentation you need, and how to get credentialed.
Mass General Brigham (formerly Partners HealthCare) is one of the nation's leading integrated health systems, headquartered in Somerville, Massachusetts. The system includes Massachusetts General Hospital, Brigham and Women's Hospital, and 14 other hospitals and hundreds of outpatient facilities across Massachusetts. As the largest private employer in Massachusetts, Mass General Brigham is a global leader in medical research and education.
Mass General Brigham uses Green Security for vendor credentialing across its facilities. All vendor representatives must register and maintain active credentials before visiting Mass General Brigham facilities.
Register on Green Security →Partner offer
Need a drug screen for credentialing? The test usually is not specific to any one platform or hospital — one comprehensive panel can satisfy the requirement at nearly every facility. Our partner Accesa Labs offers a single chain-of-custody urine test that screens for 19 drugs, including fentanyl and other synthetic opioids, so one order covers you in almost every situation instead of a separate test per credentialing company.
Order the Credentialing Drug Panel → (Partner link — HCH may earn a referral fee.)
Requirements vary by facility. Always verify current requirements on Green Security before scheduling a visit. Platform confirmed against Green Security's own facility list, which includes Brigham and Women's Hospital (checked 17 August 2026).
Register at greensecurityllc.com with your company information. Mass General Brigham uses Green Security across its network of hospitals including MGH and Brigham and Women's Hospital.
Upload all required documentation: insurance certificates, background check, drug screening, HIPAA training, and immunization records.
Mass General Brigham processes vendor credentials at both the system and facility level. Allow 7–14 business days for complete submissions at flagship hospitals.
Always use Green Security to check in before entering any Mass General Brigham facility. High-security clinical and research areas require advance scheduling.
Search our database of nearly 18,000 U.S. hospitals, surgery centers and clinics to find specific credentialing requirements for any Mass General Brigham facility.
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Or read the full 2026 Vendor Credentialing Requirements Guide — everything you need to know about hospital vendor credentialing in 2026.