John F. O'Neill, MD

Primary specialty

Ophthalmology PhysicianTaxonomy code 207W00000X

License

D0009712 Issued in MD

Practice address

2 Wisconsin Cir
Suite 200
Chevy Chase, MD 20815-7003

Phone

(301) 215-7100

NPI assigned

Oct 11, 2005

Last updated

Sep 11, 2025By the provider in NPPES

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Katzen Medical Associates, PC

  dba National Retina Institute

  • Ophthalmology Physician
  • Lutherville, MD
  • NPI 1326052614
  NPD (past)

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1128988800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1346238516",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2 WISCONSIN CIR",
            "address_2": "SUITE 200",
            "city": "CHEVY CHASE",
            "state": "MD",
            "postal_code": "208157003",
            "telephone_number": "301-215-7100"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2 WISCONSIN CIR",
            "address_2": "SUITE 200",
            "city": "CHEVY CHASE",
            "state": "MD",
            "postal_code": "208157003",
            "telephone_number": "301-215-7100"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "O'NEILL",
        "first_name": "JOHN",
        "middle_name": "F.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-10-11",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208000000X",
            "taxonomy_group": "",
            "desc": "Pediatrics",
            "state": "DC",
            "license": "2982",
            "primary": false
        },
        {
            "code": "207W00000X",
            "taxonomy_group": "",
            "desc": "Ophthalmology",
            "state": "MD",
            "license": "D0009712",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• North American Partners in Anesthesia Maryland LLC
• North American Partners in Anesthesia Maryland LLC
• Julia Novak
• NSPC Surgery Center Chevy Chase, LLC
• Constance Larko Nyaunu, MD
• Oak Anesthesia Associates LLC
• Oak Anesthesia Associates Medical
• Youssef Obeid, DDS
• Florian Cristine De Leon Ocampo
• Mana Ogholikhan, M.D.

• Ophthalmology Physician in Chevy Chase, MD
• Providers in Chevy Chase, MD by specialty
• Ophthalmology Physician in Maryland

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.