Margaret O'NeillMD
Obstetrics & Gynecology·Glastonbury, CT
Margaret O'Neill, MD is an Obstetrics & Gynecology provider in Glastonbury, CT, as of July 2026.
- NPI1255918868
- Registered2021
- Class of2021
Case volumes, referral patterns, and payer mix live in DataLily AI Insights.
Education
Education on record as of August 2026.
Margaret O'Neill at a glance
- Provider
- Margaret O'Neill
- Credential
- MD
- Specialty
- Obstetrics/Gynecology
- Procedures
- Obstetrics & Gynecology CPT codes
- Location
- Glastonbury, CT
- Medical school
- University of Connecticut School of Medicine
- Graduated
- 2021
- NPI registered
- 2021
- NPI
- 1255918868
- Snapshot
- July 2026
Identity, specialty, and affiliations change over time. This is not an endorsement, and not clinical, billing, or legal advice. Providers may request corrections at founders@datalilyai.com. Read the DataLily AI data methodology.
Questions
Where does Margaret O'Neill practice?
Margaret O'Neill, MD is based in Glastonbury, CT. Affiliations reflect the current DataLily AI snapshot (July 2026) and can change.
What is Margaret O'Neill's NPI number?
Margaret O'Neill's National Provider Identifier (NPI) is 1255918868, registered in 2021. Specialty on record: Obstetrics/Gynecology; credential MD.
Where did Margaret O'Neill go to medical school?
Margaret O'Neill, MD attended University of Connecticut School of Medicine, graduating in 2021.
How many Obstetrics & Gynecology providers in Connecticut work at ambulatory surgery centers?
113 Obstetrics & Gynecology surgeons and proceduralists in Connecticut are affiliated with ambulatory surgery centers in DataLily AI's current snapshot, Margaret O'Neill among them. The Connecticut Obstetrics & Gynecology directory lists each one by city with credential, NPI, and center affiliations.
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