Quick answers
- Which hospitals does Catharina Armstrong work at?
- Medicare's official clinician data lists Catharina Armstrong at 2 hospitals: Massachusetts General Hospital and Newton-Wellesley Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Catharina Armstrong see patients?
- Medicare's clinician data lists 1 practice location in Newton, MA. Call before your visit to confirm the address.
- What is Catharina Armstrong's specialty?
- Medicare lists Infectious Disease as the primary specialty.
- Does Catharina Armstrong accept Medicare assignment?
- Yes. Medicare's clinician data says Catharina Armstrong 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 Catharina Armstrong offer telehealth?
- Medicare's clinician data says Catharina Armstrong offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Catharina Armstrong?
- (617) 243-6000, as listed in official Medicare / NPI Registry data.
- What is Catharina Armstrong's NPI number?
- 1538295217. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Catharina Armstrong works
Medicare's Facility Affiliation Data lists Catharina Armstrong at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Massachusetts General HospitalBoston, MA · Acute Care Hospital · CCN 220071
- Newton-Wellesley HospitalNewton, MA · Acute Care Hospital · CCN 220101
Practice locations
Addresses where Catharina Armstrong is enrolled with Medicare (CMS data updated 2026-10-02).
- 2014 Washington StNewton, MA 02462 (617) 243‑6000
Group practices
Medicare enrollment lists Catharina Armstrong as a member of this group (CMS data updated 2026-10-02).
- Mass General Brigham Medical Group Suburban Massachusetts Inc602 clinicians in the group
Specialties
- Infectious Diseaseprimary
Other infectious disease doctors in Newton
Clinicians with the same Medicare primary specialty in Newton, MA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2003 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1538295217 |
| 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