Regan Melissa Duffy, MD
Medical Oncology Physician · Portland, OR
Regan Melissa Duffy, MD is a medical oncology physician with a practice address in Portland, Oregon, and NPI 1487876827, issued on May 3, 2007. Check the license (Oregon MD28919, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Regan Melissa Duffy
- Credential
- MD
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- MD28919 OR
Self-reported in NPPES; status is on the state search - Practice location
- 9135 SW Barnes RD, Portland, OR 97225
- Phone
- (503) 216-6300
- Enumerated
- May 3, 2007
- Record last updated
- May 2, 2025
- Medicaid ID
- 5500654736 OR
- Medicare enrollment
- Enrolled (PECOS I20130806000605); accepts Medicare assignment
- Medical or professional school
- Oregon Health Sciences University School Of Medicine, 2007
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 9135 SW Barnes RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Lisa Benaron, M.D.Internal Medicine Physician1275610990
- James Biemer, MDInternal Medicine Physician1750300703
- Stephen Bookin, MDEndocrinology, Diabetes & Metabolism Physician1801944301
- Daniel Brown, MDOphthalmology Physician1093717597
Verify Regan Melissa Duffy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD28919Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
11% more Medicare Part D claims than the average medical oncology physician in 2024
777 Medicare Part D claims for 119 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. 59 claims were for opioids.
Most prescribed
- Tagrisso80 claims
- Dexamethasone70 claims
- Prochlorperazine Maleate56 claims
- Levothyroxine Sodium45 claims
- Oxycodone Hcl38 claims
- Gabapentin37 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 3 group practices
- Providence Health And Services - OregonPortland, OR
- Providence Health And Services - OregonPortland, OR
- Providence Health And Services OregonPortland, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Medical Oncology Physician providers in Oregon
There are 107 medical oncology physician records in Oregon.
Other medical oncology physician records in Oregon
- Anupama Acheson, MDPortland, OR1780689513
- Molly Andreason, MDPortland, OR1831518687
- Dilip Babu, MDTualatin, OR1285904615
- Titas BanerjeeGresham, OR1659807931
- Tomasz Beer, MDPortland, OR1669487179
- Raed Benkhadra, MDCorvallis, OR1255837746
- Eric Bernstein, M.D.Hood River, OR1629290549
- Matthew Blackburn, M.D.Portland, OR1376076828
- Charles Blanke, MDPortland, OR1639187198
- Theodore Braich, M.D.Bend, OR1649286204
Common questions
What is Regan Melissa Duffy, MD's NPI number?
Regan Melissa Duffy, MD's National Provider Identifier (NPI) is 1487876827, issued on May 3, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Regan Melissa Duffy, MD located?
The NPPES record lists a practice address at 9135 SW Barnes RD, Portland, OR, 97225. Phone: (503) 216-6300. Providers update this record themselves, so call before visiting.
How can I verify Regan Melissa Duffy, MD's license?
NPPES lists Oregon license number MD28919, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Regan Melissa Duffy, MD prescribe under Medicare Part D?
In 2024, Regan Melissa Duffy, MD had 777 Medicare Part D claims for 119 beneficiaries; the average among medical oncology physician prescribers was 703. Part D covers Medicare prescriptions only.
What is Regan Melissa Duffy, MD's MIPS final score?
The 2023 MIPS final score is 100 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.