Maryellen Horgan, P.A.
NPI 1083892566 · Surgical Physician Assistant · Boston, MA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Maryellen Horgan, P.A. is a Surgical Physician Assistant provider in Boston, MA (NPI 1083892566).
Provider details
- NPI number
- 1083892566
- Entity type
- Individual
- Primary specialty
- Surgical Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- P.A.
- Sex
- Female
- Sole proprietor
- No
- License
- 875 (MA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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
- 2008-02-06
- Last updated
- 2019-06-27
Frequently asked questions
- What is Maryellen Horgan's NPI number?
- Maryellen Horgan's National Provider Identifier (NPI) is 1083892566, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maryellen Horgan's specialty?
- Maryellen Horgan is listed in the NPPES registry with a primary specialty of Surgical Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Maryellen Horgan located?
- Maryellen Horgan's practice location on file with NPPES is 300 Longwood Ave, Boston, MA 02115-5724.
- What is Maryellen Horgan's phone number?
- The practice phone number listed in the NPPES registry for Maryellen Horgan is (617) 355-6000.
- Does Maryellen Horgan accept Medicare?
- Maryellen Horgan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Maryellen Horgan's NPI active?
- Yes — Maryellen Horgan's NPI (1083892566) is active in the NPPES registry as of the last update on 2019-06-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.