RUTH M O'REGAN MD
NPI 1215981238
Internal Medicine - Medical Oncology in Rochester, NY
About Ruth M O'regan Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
RUTH M O'REGAN MD (NPI 1215981238) is an individual medical oncology provider in Rochester, New York, licensed in New York (308369) and active in the NPI registry since May 2006. She is enrolled in Medicare PECOS, is affiliated with Highland Hospital, and is a graduate of Other (1988).
NPPES Registry Identity
Specialties & Licenses 2
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
Ruth M O'regan 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
3Medicare enrollment records show Ruth O'regan reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Rochester, NY 14642
- Reassigned Medicare billing, New York enrollment
- 154 clinicians in this Medicare group
Rochester, NY 14642
- Reassigned Medicare billing, New York enrollment
- 1,624 clinicians in this Medicare group
Darlington, WI 53530
- Reassigned Medicare billing, Wisconsin enrollment
- 175 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.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Highland Hospital
Acute Care Hospitals · Rochester, NYStrong Memorial Hospital
Acute Care Hospitals · Rochester, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 14642 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.
ROCHESTER, NY 14642
ROCHESTER, NY 14642
ROCHESTER, NY 14642
ROCHESTER, NY 14642
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 Ruth O'regan's NPI number?
The NPI number for Ruth O'regan is 1215981238. It was assigned to this individual provider in the NPPES registry on May 22, 2006.
Where is Ruth O'regan located?
Ruth O'regan practices at 601 Elmwood Ave, Rochester, NY 14642. The listed phone number is (585) 275-7938.
What is Ruth O'regan's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.
Is Ruth O'regan enrolled in Medicare?
Yes. Ruth O'regan 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 Ruth O'regan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ruth O'regan reassigns Medicare benefits to 3 organizations: Hematology Clinical Group (Rochester, NY), University Of Rochester (Rochester, NY) and Southwest Health Center, Inc. (Darlington, WI). 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 Ruth O'regan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Ruth O'regan affiliated with any hospitals?
According to CMS data, Ruth O'regan is affiliated with Highland Hospital and Strong Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Ruth O'regan was last updated on July 3, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years 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.
# Ruth M O'regan, MD · NPI 1215981238
Medical Oncology physician in Rochester, New York. Individual provider, active in the CMS NPPES registry since May 22, 2006.
## Identity
- **NPI:** 1215981238 (Entity type: Individual)
- **Enumerated:** May 22, 2006
- **Primary specialty:** Internal Medicine - Medical Oncology · taxonomy 207RX0202X
- **State license:** 308369 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 601 ELMWOOD AVE, Rochester, NY 14642-5209
- **Phone:** (585) 275-7938
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Hematology Clinical Group (NPI 1821049396, Rochester, NY); University Of Rochester (NPI 1346285657, Rochester, NY); Southwest Health Center, Inc. (NPI 1811511272, Darlington, WI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1988
## Record status
- **NPPES last updated:** July 3, 2023
---
Source: [NPI Profile](https://npiprofile.com/npi/1215981238) · Data from the CMS NPPES public registry.