MARGARET RYAN O'NEILL MD
NPI 1255918868
Obstetrics & Gynecology in Glastonbury, CT
About Margaret Ryan O'neill Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARGARET RYAN O'NEILL MD (NPI 1255918868) is an individual obstetrics & gynecology provider in Glastonbury, Connecticut, licensed in Connecticut (083062) and active in the NPI registry since March 2021. She is enrolled in Medicare PECOS, maintains a secondary practice location in Hartford, and is a graduate of University Of Connecticut School Of Medicine (2021).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Margaret Ryan O'neill Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 06033 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 8
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
GLASTONBURY, CT 06033
GLASTONBURY, CT 06033
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Margaret O'neill's NPI number?
The NPI number for Margaret O'neill is 1255918868. It was assigned to this individual provider in the NPPES registry on March 28, 2021.
Where is Margaret O'neill located?
Margaret O'neill practices at 330 Western Blvd Ste 102, Glastonbury, CT 06033. The listed phone number is (860) 547-0306.
What is Margaret O'neill's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Margaret O'neill enrolled in Medicare?
Yes. Margaret O'neill is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
When was this NPI record last updated?
The NPPES record for Margaret O'neill was last updated on September 30, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
