Quick answers
- Which hospitals does Mark J. Walker work at?
- Medicare's official clinician data lists Mark J. Walker at 4 hospitals: Brigham and Women Faulkner Hospital, Brigham and Women's Hospital, Massachusetts General Hospital and Newton-Wellesley Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark J. Walker see patients?
- Medicare's clinician data lists 2 practice locations, including Jamaica Plain, MA and Boston, MA. Call before your visit to confirm the address.
- What is Mark J. Walker's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Mark J. Walker accept Medicare assignment?
- Yes. Medicare's clinician data says Mark J. Walker accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Mark J. Walker offer telehealth?
- Medicare's clinician data says Mark J. Walker offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mark J. Walker?
- (617) 983-7000, as listed in official Medicare / NPI Registry data.
- What is Mark J. Walker's NPI number?
- 1003330028. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark J. Walker works
Medicare's Facility Affiliation Data lists Mark J. Walker at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Brigham and Women Faulkner HospitalJamaica Plain, MA · Acute Care Hospital · CCN 220119
- Brigham and Women's HospitalBoston, MA · Acute Care Hospital · CCN 220110
- Massachusetts General HospitalBoston, MA · Acute Care Hospital · CCN 220071
- Newton-Wellesley HospitalNewton, MA · Acute Care Hospital · CCN 220101
Practice locations
Addresses where Mark J. Walker is enrolled with Medicare (CMS data updated 2026-10-02).
- 1153 Centre StJamaica Plain, MA 02130 (617) 983‑7000
- 75 Francis StBoston, MA 02115 (617) 732‑5500
Group practices
Medicare enrollment lists Mark J. Walker as a member of this group (CMS data updated 2026-10-02).
- Brigham and Womens Physicians Organization Inc2,994 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Jamaica Plain
Clinicians with the same Medicare primary specialty in Jamaica Plain, MA — not a recommendation.
Clinician information
| Graduation year | 2017 |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1003330028 |
| 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 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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