Margaret Ryan O'Neill, MD

Primary specialty

Obstetrics & Gynecology PhysicianTaxonomy code 207V00000X

License

083062 Issued in CT

Practice address

330 Western Blvd Ste 102
Glastonbury, CT 06033-4383

Phone

(860) 547-0306

NPI assigned

Mar 28, 2021

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 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

Obstetrics/Gynecology

Education

University of Connecticut School of Medicine, 2021

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Physicians for Women'S Health, LLCGroup PAC ID 3274430665, 319 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: margaret.o.neill.1@10170.direct.athenahealth.com

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.

• Physicians for Women'S Health LLC

  • Obstetrics & Gynecology Physician
  • Rocky Hill, CT
  • NPI 1801826680
  Medicare reassignment Care Compare group NPD
• Hartford Hospital

  • Surgery Physician
  • Hartford, CT
  • NPI 1407806391

  Obstetrics & Gynecology

  Medicare reassignment NPD
• Hartford Hospital

  • General Acute Care Hospital
  • Hartford, CT
  • NPI 1770696643
  NPD

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

{
    "created_epoch": "1616889600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1759190400000",
    "number": "1255918868",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "330 WESTERN BLVD STE 102",
            "city": "GLASTONBURY",
            "state": "CT",
            "postal_code": "060334383",
            "telephone_number": "860-547-0306"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "330 WESTERN BLVD STE 102",
            "city": "GLASTONBURY",
            "state": "CT",
            "postal_code": "060334383",
            "telephone_number": "860-547-0306"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "80 Seymour St",
            "address_purpose": "LOCATION",
            "city": "Hartford",
            "state": "CT",
            "postal_code": "061028000",
            "country_code": "US",
            "telephone_number": "860-972-3497",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "O'NEILL",
        "first_name": "MARGARET",
        "middle_name": "RYAN",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2021-03-28",
        "last_updated": "2025-09-30",
        "certification_date": "2025-09-30",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207V00000X",
            "taxonomy_group": "",
            "desc": "Obstetrics & Gynecology",
            "state": "CT",
            "license": "083062",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Kelly O'Connell-Seagraves, LPC
• Kevin William O'Connell
• Terry Saphr O'Donnell, PA
• Lauren A O'Leary, LPC
• Kerry K O'Neal, OD
• James Joseph Ocampo, MD
• Oct Care of CT, LLC
• Oculusdocs, LLC
• Oh Baby Lactation Care
• Peter Vannah Oliver, PH.D., LPC, M.A, NCC

• Obstetrics & Gynecology Physician in Glastonbury, CT
• Providers in Glastonbury, CT by specialty
• Obstetrics & Gynecology Physician in Connecticut

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 30, 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.