John O'Neill, MD
NPI 1346238516 · Ophthalmology Physician · Chevy Chase, MD
John O'Neill, MD is a Ophthalmology Physician provider in Chevy Chase, MD (NPI 1346238516).
Provider details
- NPI number
- 1346238516
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 2982 (DC)
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
- 2005-10-11
- Last updated
- 2025-09-11
Frequently asked questions
- What is John O'Neill's NPI number?
- John O'Neill's National Provider Identifier (NPI) is 1346238516, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John O'Neill's specialty?
- John O'Neill is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is John O'Neill located?
- John O'Neill's practice location on file with NPPES is 2 Wisconsin Cir, Chevy Chase, MD 20815-7003.
- What is John O'Neill's phone number?
- The practice phone number listed in the NPPES registry for John O'Neill is (301) 215-7100.
- Is John O'Neill's NPI active?
- Yes — John O'Neill's NPI (1346238516) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.