William Ollar, DO
NPI 1255318291 · Anesthesiology Physician · Somersworth, NH
William Ollar, DO is a Anesthesiology Physician provider in Somersworth, NH (NPI 1255318291).
Provider details
- NPI number
- 1255318291
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 8468 (NH)
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
20 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
- 2005-12-30
- Last updated
- 2015-03-12
Frequently asked questions
- What is William Ollar's NPI number?
- William Ollar's National Provider Identifier (NPI) is 1255318291, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Ollar's specialty?
- William Ollar is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is William Ollar located?
- William Ollar's practice location on file with NPPES is 7 Marsh Brook Dr, Somersworth, NH 03878-6523.
- What is William Ollar's phone number?
- The practice phone number listed in the NPPES registry for William Ollar is (603) 749-7246.
- Is William Ollar's NPI active?
- Yes — William Ollar's NPI (1255318291) is active in the NPPES registry as of the last update on 2015-03-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.