Elsa Treffeisen
NPI 1780116954 · Pediatric Allergy/Immunology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Allergy/Immunology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Elsa Treffeisen is a Pediatric Allergy/Immunology Physician provider in Boston, MA (NPI 1780116954).
Provider details
- NPI number
- 1780116954
- Entity type
- Individual
- Primary specialty
- Pediatric Allergy/Immunology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
- License
- 282739 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
9 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
- 2017-03-28
- Last updated
- 2023-04-24
- Certified
- 2023-04-24
Frequently asked questions
- What is Elsa Treffeisen's NPI number?
- Elsa Treffeisen's National Provider Identifier (NPI) is 1780116954, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Elsa Treffeisen's specialty?
- Elsa Treffeisen is listed in the NPPES registry with a primary specialty of Pediatric Allergy/Immunology Physician (Allopathic & Osteopathic Physicians).
- Where is Elsa Treffeisen located?
- Elsa Treffeisen's practice location on file with NPPES is 300 Longwood Ave, Boston, MA 02115-5724.
- What is Elsa Treffeisen's phone number?
- The practice phone number listed in the NPPES registry for Elsa Treffeisen is (617) 355-6000.
- Does Elsa Treffeisen accept Medicare?
- Elsa Treffeisen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Elsa Treffeisen's NPI active?
- Yes — Elsa Treffeisen's NPI (1780116954) is active in the NPPES registry as of the last update on 2023-04-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.