Michael O'Neill, M.D.

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

66914 Issued in CT

Practice address

111 Beach Rd
Fairfield, CT 06824-6668

Phone

(203) 696-3560

Fax

(203) 696-3563

NPI assigned

Mar 29, 2017

Sex

Male

Sole proprietor

No

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

Specialties & licenses 3

Addresses

Medicare fee-for-service enrollment

Enrolled in CT

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

Specialty

HospitalistAlso: Internal Medicine

Education

Other, 2017

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Hartford Healthcare Medical Group Specialists PLLCGroup PAC ID 3173866241, 1,555 clinicians

Rehabilitation Associates IncGroup PAC ID 8022905322, shared by 2 NPIs, 525 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Hartford Healthcare at Home Home health agency, East Hartford, CT, CCN 077041
• St Vincent'S Medical Center Hospital, Bridgeport, CT, CCN 070028
• Bridgeport Hospital Hospital, Bridgeport, CT, CCN 070010

Merit-based Incentive Payment System (MIPS)

Final score

90.42 of 100Reported as group

Quality

83.36

Promoting interoperability

100

Improvement activities

40

Cost

75.9

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: moneill586456@direct.ynhh.org
• Direct secure messaging: michael.oneill@xdr.hhchealthdirect.org

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.

• Hartford Healthcare Medical Group Specialists, PLLC

  • Surgery Physician
  • Hartford, CT
  • NPI 1023584216
  Medicare reassignment Care Compare group NPD
• Northeast Medical Group, Inc.

  • Internal Medicine Physician
  • Bridgeport, CT
  • NPI 1043278351
  Medicare reassignment NPD
• St. Vincents Urgent Care LLC

  • Urgent Care Clinic/Center
  • Fairfield, CT
  • NPI 1912305483

  Internal Medicine

  Medicare reassignment NPD
• Hartford Healthcare Medical Group Specialists LLC

  • Customized Equipment (DME)
  • Groton, CT
  • NPI 1295367068
  NPD
• St. Vincents Urgent Care LLC

  • Internal Medicine Physician
  • Trumbull, CT
  • NPI 1043852569
  NPD

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

• Bridgeport Hospital

  • General Acute Care Hospital
  • Bridgeport, CT
  • NPI 1649260845
  Care Compare affiliation
• Bridgeport Hospital

  • General Acute Care Hospital
  • Bridgeport, CT
  • NPI 1992910152
  Care Compare affiliation
• Hartford Healthcare at Home, Inc

  • Home Health Agency
  • Wethersfield, CT
  • NPI 1073529566
  Care Compare affiliation
• SVMC Holdings, Inc

  • General Acute Care Hospital
  • Bridgeport, CT
  • NPI 1942224696
  Care Compare affiliation

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

{
    "created_epoch": "1490745600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1750809600000",
    "number": "1356873319",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "111 BEACH RD",
            "city": "FAIRFIELD",
            "state": "CT",
            "postal_code": "068246668",
            "telephone_number": "203-696-3560"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "111 BEACH RD",
            "city": "FAIRFIELD",
            "state": "CT",
            "postal_code": "068246668",
            "telephone_number": "203-696-3560",
            "fax_number": "203-696-3563"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "O'NEILL",
        "first_name": "MICHAEL",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2017-03-29",
        "last_updated": "2025-06-25",
        "certification_date": "2025-06-25",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "NY",
            "license": "305546",
            "primary": false
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "CT",
            "license": "66914",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CT",
            "license": "66914",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Sandra Nute-Aupi, PA
• Nutritional Healing Center
• Leah O'Brien, MS CCC-SLP
• Joann O'Connell
• Tara L O'Connor
• Noelle O'Shea, APRN
• Peter D. O'Shea, DDS
• Jeffrey L Oberman, MD
• Obstetrics and Gynecology of Fairfield County, LLC
• Millicent Hamuah Obubah, NP

• Internal Medicine Physician in Fairfield, CT
• Providers in Fairfield, CT by specialty
• Internal Medicine Physician in Connecticut

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 25, 2025; 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.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.