Quick answers
- Which hospitals does Mary Njonjo work at?
- Medicare's official clinician data lists Mary Njonjo at 1 hospital: Lowell General Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mary Njonjo see patients?
- Medicare's clinician data lists 2 practice locations, including Tewksbury, MA and Salem, MA. Call before your visit to confirm the address.
- What is Mary Njonjo's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Mary Njonjo accept Medicare assignment?
- Yes. Medicare's clinician data says Mary Njonjo 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.
- What is the phone number for Mary Njonjo?
- (978) 851-7321, as listed in official Medicare / NPI Registry data.
- What is Mary Njonjo's NPI number?
- 1245400142. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mary Njonjo works
Medicare's Facility Affiliation Data lists Mary Njonjo at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Lowell General HospitalLowell, MA · Acute Care Hospital · CCN 220063
Practice locations
Addresses where Mary Njonjo is enrolled with Medicare (CMS data updated 2026-10-02).
- 365 E StTewksbury, MA 01876 (978) 851‑7321
- 55 Highland Ave, Suite 304Salem, MA 01970 (978) 354‑4611
Group practices
Medicare enrollment lists Mary Njonjo as a member of these groups (CMS data updated 2026-10-02).
- The Commonwealth of Massachusetts146 clinicians in the group
- Charter Health PC28 clinicians in the group
- Charter LTC LLC20 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Tewksbury
Clinicians with the same Medicare primary specialty in Tewksbury, MA — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2007 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1245400142 |
| 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