Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Eleni Efstathiou, MD

Individual provider Medical Oncology Physician · NPI 1447654470

Eleni Efstathiou, MD practises Medical Oncology in Portland, Oregon. Qualified in 1995, 31 years ago. Practices with Tmh Physician Associates PLLC, a 1,899-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Oregon and Texas.

Years since qualifying
31
Licensed in
OR, TX
In the registry since
2014
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

3303 S Bond Ave
Portland, OR 97239-4501
Phone: (503) 494-6594
Fax: (503) 494-5385
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1515 Holcombe Blvd, Houston, TX 77030 — (713) 792-6161

Specialties & licences

Medical Oncology Physician (primary) Taxonomy 207RX0202X · Licence MF229340 (OR)
Medical Oncology Physician Taxonomy 207RX0202X · Licence 44660 (TX)

Record details

NPI number1447654470
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 20, 2014
Last updated in NPPESFebruary 11, 2026
Certification dateFebruary 11, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyMEDICAL ONCOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1995 (31 years in practice)
Group practice Tmh Physician Associates Pllc — 1899 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations10 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients160
Services billed 415 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Consulting Fee $83,527 14 payments
Travel and Lodging $13,956 32 payments · travel or lodging paid or reimbursed, such as to attend a conference
Honoraria $6,800 1 payment
Food and Beverage $459 5 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Houston Methodist Clear Lake Hospital Hospital · Nassau Bay, TX · listed as Houston Methodist St John Hospital
  • Houston Methodist Hospital Hospital · Houston, TX · listed as The Methodist Hospital, Houston
  • Houston Methodist The Woodlands Hospital Hospital · The Woodlands, TX
  • Houston Methodist West Hospital Hospital · Houston, TX
  • Ohsu Hospital And Clinics Hospital · Portland, OR

Colleagues at Tmh Physician Associates PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1899 clinicians in the practice; 12 are shown here.

Other providers in Portland