REGAN MELISSA DUFFY MD
NPI 1487876827
Internal Medicine - Medical Oncology in Portland, OR
About Regan Melissa Duffy Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
REGAN MELISSA DUFFY MD (NPI 1487876827) is an individual medical oncology provider in Portland, Oregon, licensed in Oregon (MD28919) and active in the NPI registry since May 2007. She is enrolled in Medicare PECOS, is affiliated with Providence St Vincent Medical Center, and is a graduate of Oregon Health Sciences University School Of Medicine (2007).
NPPES Registry Identity
Specialties & Licenses 3
Other Identifiers 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
Regan Melissa Duffy 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
5Medicare enrollment records show Regan Duffy reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Portland, OR 97225
- Reassigned Medicare billing, Oregon enrollment
- 1,501 clinicians in this Medicare group
Portland, OR 97225
- Reassigned Medicare billing, Oregon enrollment
- 753 clinicians in this Medicare group
Portland, OR 97213
- Reassigned Medicare billing, Oregon enrollment
- 676 clinicians in this Medicare group
Mt Hood, OR 97041
- Reassigned Medicare billing, Oregon enrollment
- Medicare enrollment name: Providence Health & Services Oregon
- Also billed through NPI 1255429338 (Oregon)
- 267 clinicians in this Medicare group
Cannon Beach, OR 97110
- Reassigned Medicare billing, Oregon enrollment
- 301 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 3
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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Providence St Vincent Medical Center
Acute Care Hospitals · Portland, ORProvidence Portland Medical Center
Acute Care Hospitals · Portland, ORProvidence Seaside Hospital
Critical Access Hospitals · Seaside, ORPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 97225 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
PORTLAND, OR 97225
PORTLAND, OR 97225
PORTLAND, OR 97225
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 Regan Duffy's NPI number?
The NPI number for Regan Duffy is 1487876827. It was assigned to this individual provider in the NPPES registry on May 3, 2007.
Where is Regan Duffy located?
Regan Duffy practices at 9135 SW Barnes Rd Suite 261, Portland, OR 97225. The listed phone number is (503) 216-6300.
What is Regan Duffy's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.
Is Regan Duffy enrolled in Medicare?
Yes. Regan Duffy 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 Regan Duffy's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Regan Duffy reassigns Medicare benefits to 5 organizations: Providence Health & Services - Oregon (Portland, OR), Providence Health & Services - Oregon (Portland, OR), Providence Health & Services - Oregon (Portland, OR), Providence Hood River Memorial Hospital (Mt Hood, OR) and Providence Health & Services Oregon (Cannon Beach, OR). 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 Regan Duffy's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Regan Duffy accept?
Health plans from Providence Health Plan list Regan Duffy 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.
Is Regan Duffy affiliated with any hospitals?
According to CMS data, Regan Duffy is affiliated with Providence St Vincent Medical Center, Providence Portland Medical Center and Providence Seaside Hospital.
When was this NPI record last updated?
The NPPES record for Regan Duffy was last updated on May 2, 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.
# Regan Melissa Duffy, MD · NPI 1487876827
Medical Oncology physician in Portland, Oregon. Individual provider, active in the CMS NPPES registry since May 3, 2007.
## Identity
- **NPI:** 1487876827 (Entity type: Individual)
- **Enumerated:** May 3, 2007
- **Primary specialty:** Internal Medicine - Medical Oncology · taxonomy 207RX0202X
- **State license:** MD28919 (Oregon)
- **Sole proprietor:** No
## Practice location
- **Address:** 9135 SW BARNES RD, SUITE 261, Portland, OR 97225-6784
- **Phone:** (503) 216-6300
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): Providence Health & Services - Oregon (NPI 1154427821, Portland, OR); Providence Health & Services - Oregon (NPI 1235259532, Portland, OR); Providence Health & Services - Oregon (NPI 1003991845, Portland, OR); Providence Hood River Memorial Hospital (NPI 1437355955, Mt Hood, OR); Providence Health & Services Oregon (NPI 1841756764, Cannon Beach, OR) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Oregon Health Sciences University School Of Medicine, class of 2007
## Record status
- **NPPES last updated:** May 2, 2025
- **Other identifiers:** Medicaid 5500654736 (OR)
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Source: [NPI Profile](https://npiprofile.com/npi/1487876827) · Data from the CMS NPPES public registry.