Eleni Efstathiou, M.D.
Medical Oncology Internal Medicine
Eleni Efstathiou is a Medical Oncology Internal Medicine specialist based in Portland, OR with over 31 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
Also practices: INTERNAL MEDICINE
Eleni Efstathiou, M.D. practices as part of a group medical oncology internal medicine specialist practice in Portland, OR. She has been in practice for 31+ years. She regularly sees Medicare patients with hypertension, high cholesterol, and cancer (per CMS claims data).
At a glance
- Prescribes opioids less than 39% of reporting doctors in Oregon
- Virtual visits available — no app or travel required
Older · 103dNPPES updated 2026-02-11 · verify NPI on CMS · Verify license at Oregon Medical Board
Contact & Location
Practice Location
3303 S Bond Ave, Portland, OR 97239-4501
How Does This Doctor Compare?
Based on Medicare data, this doctor prescribes opioid pain medications conservatively.
Opioid Rx
↓ Lower = better4.03%
Oregon avg: 7 · US avg: 5.1
✓ Higher than most doctors nationally(-1.1 pts)
4.03% of this doctor's prescriptions are opioid pain medications. Lower means more cautious prescribing.
Medicare Patients
137
Unique beneficiaries
Standard volumePrescription Recipients
112
Patients prescribed
Prescriptions Written
1,042
Total claims
Total Medicare drug cost: $4.00M
Percentile rankings compared against 1,341 reporting peers in Oregon.
Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages Hypertension, High Cholesterol, and Cancer.
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↑ More patients than average (+5%) — a focus area for this doctor
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↑ More patients than average (+5%) — a focus area for this doctor
Diseases involving abnormal cell growth with potential to spread to other body parts
US avg: 20.8%↑ More patients than average (+54%) — a focus area for this doctor
Reduced blood flow to the heart muscle, commonly known as coronary artery disease
US avg: 31.7%↑ More patients than average (+17%) — a focus area for this doctor
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↓ Fewer patients than average (-7%) — less common here
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%↓ Fewer patients than average (-3%) — less common here
Gradual loss of kidney function over time, often linked to diabetes or hypertension
US avg: 29.6%↑ More patients than average (+1%) — a focus area for this doctor
An irregular, often rapid heartbeat that increases the risk of stroke
US avg: 22%↑ More patients than average (+1%) — a focus area for this doctor
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$109.5k received from industry
48 transactions reported in 2024 ·Very High tier
Payments include consulting fees, speaking honoraria, food & beverage, travel, research support, and ownership interests from drug and medical device manufacturers. Disclosure is required by the federal Physician Payments Sunshine Act. These payments do not necessarily indicate conflicts of interest. National median: $338 across 136 000 tracked providers.
Tiers — Low: under $500 · Moderate: $500-5 000 · High: $5 000-25 000 · Very High: $25 000+. Source: CMS Open Payments 2024, attributed to Eleni Efstathiou's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Board certified · Feb 10, 2026
Self-reported via NPPES
31 years in practice
Senior practitioner
Medical oncologists diagnose and treat cancer using chemotherapy, immunotherapy, targeted therapy, and hormone therapy. They coordinate care with surgical oncologists and radiation oncologists for comprehensive cancer treatment.
Taxonomy: 207RX0202X
Mailing address
1400 Sw 5th Ave Ste 500, Portland, OR 97201-5537
Differs from practice location
Virtual Medical Oncology Care With Eleni Efstathiou
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Eleni Efstathiou for blood pressure monitoring, cholesterol management, follow-up consultations — no travel to Portland required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about Eleni Efstathiou
NPI records show Dr. Efstathiou as active with telehealth listed in Portland, OR. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (503) 494-6594.
Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D · CMS Open Payments 2024 · CMS Physician Comparator. See Data Methodology.
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Contact Eleni Efstathiou
Practice Location
3303 S Bond Ave, Portland, OR 97239-4501
Mailing Address
1400 Sw 5th Ave Ste 500, Portland, OR 97201-5537
This is a provider directory. Contact the office directly to schedule appointments.
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