Quick answers
- Does Mary-Christine Sullivan accept Medicare assignment?
- Yes. Medicare's clinician data says Mary-Christine Sullivan accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Mary-Christine Sullivan see?
- In 2024, CMS data shows 19 Original Medicare patients and 36 services for Mary-Christine Sullivan. This counts Original Medicare only and measures volume, not quality.
- What is Mary-Christine Sullivan's NPI number?
- 1871874636. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Mary-Christine Sullivan, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 19 |
|---|---|
| Services billed to Medicare | 36 |
| Different services or procedures | 9 |
| Participating Medicare provider | Yes |
| Average age of these patients | 59 |
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol63%
Hospitals where Mary-Christine Sullivan works
Medicare's Facility Affiliation Data lists Mary-Christine Sullivan at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Brigham and Women Faulkner HospitalJamaica Plain, MA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 220119
- Brigham and Women's HospitalBoston, MA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 220110
Practice locations
Addresses where Mary-Christine Sullivan is enrolled with Medicare (CMS data updated October 2, 2026).
- 3297 Washington StBoston, MA 02130 (617) 732‑6039
- 75 Francis StBoston, MA 02115 (617) 732‑5500
Group practices
Medicare enrollment lists Mary-Christine Sullivan as a member of this group (CMS data updated October 2, 2026).
- Brigham and Womens Hospital Inc52 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Boston
Clinicians with the same Medicare primary specialty in Boston, MA — not a recommendation.
Other clinicians in Brigham and Womens Hospital Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| School | Yale University School Of Medicine |
| Graduation year | 2011 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1871874636 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians