William Nelligan, PA
NPI 1316648843 · Physician Assistant · Portland, ME
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Nelligan, PA is a Physician Assistant provider in Portland, ME (NPI 1316648843).
Provider details
- NPI number
- 1316648843
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA
- Sex
- Male
- Sole proprietor
- No
- License
- PA2652 (ME)
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
3 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 24 Francesca Ave Apt 2Somerville, MA 02144-2002Phone: (207) 831-9833
Registry dates
- Enumerated
- 2023-03-13
- Last updated
- 2025-05-07
- Certified
- 2025-05-07
Frequently asked questions
- What is William Nelligan's NPI number?
- William Nelligan's National Provider Identifier (NPI) is 1316648843, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Nelligan's specialty?
- William Nelligan is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is William Nelligan located?
- William Nelligan's practice location on file with NPPES is 22 Bramhall St, Portland, ME 04102-3134.
- What is William Nelligan's phone number?
- The practice phone number listed in the NPPES registry for William Nelligan is (207) 662-2179.
- Does William Nelligan accept Medicare?
- William Nelligan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Nelligan's NPI active?
- Yes — William Nelligan's NPI (1316648843) is active in the NPPES registry as of the last update on 2025-05-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.