NPIMap

Individual provider Active NPI

Ryan Alexander O'Connor, MD

  • Internal Medicine Physician
  • Cheektowaga, NY
National Provider Identifier
1477119949
Registry record updated Aug 13, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Internal Medicine PhysicianTaxonomy code 207R00000X
License
314095 Issued in NY
Practice address
3091 William St
Cheektowaga, NY 14227-1919
Phone
(716) 822-3098
NPI assigned
May 10, 2019
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Aug 13, 2025

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X 314095 NY Primary

Addresses

Primary practice location

3091 William St
Cheektowaga, NY 14227-1919

Mailing address

375 Mount Hope Ave Apt 205
Rochester, NY 14620-1233

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in NY
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20250804000320 NY Practitioner - Cardiovascular Disease (Cardiology)Practitioner - Internal Medicine 0648506311 Reassigns benefits to 5 organizations

Care Compare profile

Medicare Care Compare
Specialty
Cardiovascular Disease (Cardiology)Also: Internal Medicine
Education
Other, 2019
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Kenmore Mercy HospitalGroup PAC ID 7517870462, 54 clinicians
Trinity Medical Wny PCGroup PAC ID 5193907517, 207 clinicians

Practice addresses (Care Compare)

2157 Main St
Buffalo, NY 14214-2648
Phone (716) 862-1000

2950 Elmwood Ave
Kenmore, NY 14217-1304
Phone (716) 447-6100

3091 William St
Cheektowaga, NY 14227-1919
Phone (716) 822-3098

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

Practice roles

OrganizationSpecialtyStatusNew patients
Sisters of Charity Hospital of Buffalo New York CurrentSince Sep 1, 2025 Accepting new patients
Kenmore Mercy Hospital Current Accepting new patients
Sisters of Charity Hospital of Buffalo New York Current Accepting new patients
Trinity Medical Wny PC CurrentSince Aug 4, 2025 Accepting new patients
Mount St. Mary's Hospital of Niagara Falls CurrentSince Sep 1, 2025 Accepting new patients
Kenmore Mercy Hospital CurrentSince Sep 1, 2025 Accepting new patients
Mercy Hospital of Buffalo CurrentSince Sep 1, 2025 Accepting new patients
Trinity Medical Wny PC Internal Medicine Current Accepting new patients
Mercy Hospital of Buffalo CurrentSince Sep 1, 2025 Accepting new patients
Sisters of Charity Hospital of Buffalo, New York Current Accepting new patients
Kenmore Mercy Hospital Past Accepting new patients

Locations

144 Genesee St
Buffalo, NY 14203
Phone (716) 206-1510

2157 Main St
Buffalo, NY 14214
Phone (716) 862-1501

3435 Bailey Ave
Buffalo, NY 14215
Phone (716) 835-2966

144 Genesee St
Fl 3
Buffalo, NY 14203
Phone (716) 601-3690

565 Abbott Rd
Buffalo, NY 14220
Phone (716) 826-7000

3091 William St
Cheektowaga, NY 14227
Phone (716) 822-3098

5300 Military Rd
Stela Niagara, NY 14092
Phone (716) 297-4800

300 Two Mile Creek Rd
Tonawanda, NY 14150
Phone (716) 447-6450

2950 Elmwood Ave
Tonawanda, NY 14217
Phone (716) 447-6100

Organizations & group practices 11

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

Hospital & facility affiliations 11

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

NPI Registry JSON

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

{
    "created_epoch": "1557446400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1755043200000",
    "number": "1477119949",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "375 MOUNT HOPE AVE APT 205",
            "city": "ROCHESTER",
            "state": "NY",
            "postal_code": "146201233"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3091 WILLIAM ST",
            "city": "CHEEKTOWAGA",
            "state": "NY",
            "postal_code": "142271919",
            "telephone_number": "716-822-3098"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "O'CONNOR",
        "first_name": "RYAN",
        "middle_name": "ALEXANDER",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2019-05-10",
        "last_updated": "2025-08-13",
        "certification_date": "2025-08-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "NY",
            "license": "314095",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Cheektowaga, NY

Sources for this page

Verify at the official NPI Registry.