Madeleine Matthiesen, MD
NPI 1972916963 · Internal Medicine Physician · Boston, MA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Madeleine Matthiesen, MD is a Internal Medicine Physician provider in Boston, MA (NPI 1972916963).
Provider details
- NPI number
- 1972916963
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 268894 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
12 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-06-06
- Last updated
- 2018-04-20
Frequently asked questions
- What is Madeleine Matthiesen's NPI number?
- Madeleine Matthiesen's National Provider Identifier (NPI) is 1972916963, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Madeleine Matthiesen's specialty?
- Madeleine Matthiesen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Madeleine Matthiesen located?
- Madeleine Matthiesen's practice location on file with NPPES is Massachusetts General Hospital, Boston, MA 02114.
- What is Madeleine Matthiesen's phone number?
- The practice phone number listed in the NPPES registry for Madeleine Matthiesen is (617) 726-7782.
- Does Madeleine Matthiesen accept Medicare?
- Madeleine Matthiesen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Madeleine Matthiesen's NPI active?
- Yes — Madeleine Matthiesen's NPI (1972916963) is active in the NPPES registry as of the last update on 2018-04-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.