Catherine O'Neill, MD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

178896 Issued in NY

Practice address

100 High St
Buffalo, NY 14203-1126

Phone

(716) 859-2589

NPI assigned

Jun 7, 2006

Sex

Female

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in NY

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

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.

• Kaleida Health

  • General Acute Care Hospital
  • Buffalo, NY
  • NPI 1639209596
  Medicare reassignment NPD
• Kaleida Health

  • General Acute Care Hospital
  • Buffalo, NY
  • NPI 1245365196
  NPD
• Kaleida Health

  • Community/Retail Pharmacy
  • Buffalo, NY
  • NPI 1992540546
  NPD
• University at Buffalo Pathologists, Inc

  • Anatomic Pathology & Clinical Pathology Physician
  • Buffalo, NY
  • NPI 1235155581
  NPD

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

{
    "created_epoch": "1149638400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1992745194",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "100 HIGH ST",
            "city": "BUFFALO",
            "state": "NY",
            "postal_code": "142031126",
            "telephone_number": "716-859-2589"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "100 HIGH ST",
            "city": "BUFFALO",
            "state": "NY",
            "postal_code": "142031126",
            "telephone_number": "716-859-2589"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "O'NEILL",
        "first_name": "CATHERINE",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2006-06-07",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "NY",
            "license": "178896",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Kathleen A O'Leary, MD
• James Daniel O'Malley, MD
• Michael Carl O'Neil
• Stefaniee Lynne O'Neil
• Margaret A. O'Neill - Tighe, RN, BSN
• Margaret O'Neill
• Susan M O'Neill, LMT
• Olha Anna O'Quinn, PHD, CDN, CDE
• Kelsea O'Rourke
• Lawrence Robert O'Shea III

• Internal Medicine Physician in Buffalo, NY
• Providers in Buffalo, NY by specialty
• Internal Medicine Physician in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.