RUAIRI JOSEPH O CONNOR MD
NPI 1568031318
Emergency Medicine in Worcester, MA
About Ruairi Joseph O Connor Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
RUAIRI JOSEPH O CONNOR MD (NPI 1568031318) is an individual emergency medicine provider in Worcester, Massachusetts, licensed in Connecticut (80341) and active in the NPI registry since June 2021. He is enrolled in Medicare PECOS, maintains a secondary practice location in Worcester, and is a graduate of Other (2010).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Ruairi Joseph O Connor 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.
Medicare Billing Reassignments
4Medicare enrollment records show Ruairi O Connor reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Milford, MA 01757
- Reassigned Medicare billing, Massachusetts enrollment
- 37 clinicians in this Medicare group
Willimantic, CT 06226
- Reassigned Medicare billing, Connecticut enrollment
- 104 clinicians in this Medicare group
Meriden, CT 06451
- Reassigned Medicare billing, Connecticut enrollment
- 96 clinicians in this Medicare group
Waterbury, CT 06708
- Reassigned Medicare billing, Connecticut enrollment
- 83 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01655 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WORCESTER, MA 01655
WORCESTER, MA 01655
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 Ruairi O Connor's NPI number?
The NPI number for Ruairi O Connor is 1568031318. It was assigned to this individual provider in the NPPES registry on June 24, 2021.
Where is Ruairi O Connor located?
Ruairi O Connor practices at 55 Lake Ave N, Worcester, MA 01655. The listed phone number is (508) 334-1000.
What is Ruairi O Connor's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Ruairi O Connor enrolled in Medicare?
Yes. Ruairi O Connor 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.
Which organizations bill Medicare for Ruairi O Connor's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ruairi O Connor reassigns Medicare benefits to 4 organizations: Orion Emergency Services, Inc. (Milford, MA), Northeast Emergency Medicine Specialists, LLC (Willimantic, CT), Nems PLLC (Meriden, CT) and Nems W LLC (Waterbury, CT). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Ruairi O Connor's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Ruairi O Connor accept?
Health plans from WellSense Health Plan list Ruairi O Connor as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Ruairi O Connor was last updated on May 7, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.
# Ruairi Joseph O Connor, MD · NPI 1568031318
Emergency Medicine physician in Worcester, Massachusetts. Individual provider, active in the CMS NPPES registry since June 24, 2021.
## Identity
- **NPI:** 1568031318 (Entity type: Individual)
- **Enumerated:** June 24, 2021
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 80341 (Connecticut)
- **Sole proprietor:** No
## Practice location
- **Address:** 55 LAKE AVE N, Worcester, MA 01655-0002
- **Phone:** (508) 334-1000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Orion Emergency Services, Inc. (NPI 1588728240, Milford, MA); Northeast Emergency Medicine Specialists, LLC (NPI 1982889598, Willimantic, CT); Nems PLLC (NPI 1114482882, Meriden, CT); Nems W LLC (NPI 1760325666, Waterbury, CT) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2010
## Record status
- **NPPES last updated:** May 7, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1568031318) · Data from the CMS NPPES public registry.