John O'Day, M.D.
NPI 1508880964 · Otolaryngology Physician · Somersworth, NH
Enrolled with Medicare as Practitioner - Otolaryngology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John O'Day, M.D. is a Otolaryngology Physician provider in Somersworth, NH (NPI 1508880964).
Provider details
- NPI number
- 1508880964
- Entity type
- Individual
- Primary specialty
- Otolaryngology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 5507 (NH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
19 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
- 2006-07-27
- Last updated
- 2008-05-08
Frequently asked questions
- What is John O'Day's NPI number?
- John O'Day's National Provider Identifier (NPI) is 1508880964, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John O'Day's specialty?
- John O'Day is listed in the NPPES registry with a primary specialty of Otolaryngology Physician (Allopathic & Osteopathic Physicians).
- Where is John O'Day located?
- John O'Day's practice location on file with NPPES is 361 High St, Somersworth, NH 03878-1407.
- What is John O'Day's phone number?
- The practice phone number listed in the NPPES registry for John O'Day is (603) 692-4500.
- Does John O'Day accept Medicare?
- John O'Day is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John O'Day's NPI active?
- Yes — John O'Day's NPI (1508880964) is active in the NPPES registry as of the last update on 2008-05-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.