Eleni Efstathiou, M.D.

Primary specialty

Medical Oncology PhysicianTaxonomy code 207RX0202X

License

MF229340 Issued in OR

Practice address

3303 S Bond Ave
Portland, OR 97239-4501

Phone

(503) 494-6594

Fax

(503) 494-5385

NPI assigned

Oct 20, 2014

Last updated

Feb 11, 2026By the provider in NPPES

Sex

Female

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 2

Addresses

Other identifiers 2

Medicare fee-for-service enrollment

Enrolled in TX, OR2 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 2

Specialty

Medical OncologyAlso: Internal Medicine

Education

Other, 1995

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

TMH Physician Associates PLLCGroup PAC ID 4486711744, 1,881 clinicians

University Professional ServicesGroup PAC ID 4880760107, 1,683 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Houston Methodist Hospital Hospital, Houston, TX, CCN 450358
• Ohsu Hospital and Clinics Hospital, Portland, OR, CCN 380009
• Houston Methodist West Hospital Hospital, Houston, TX, CCN 670077
• Houston Methodist the Woodlands Hospital Hospital, The Woodlands, TX, CCN 670122
• Houston Methodist Clear Lake Hospital Hospital, Nassau Bay, TX, CCN 450709

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: eefstathiou381315@directhoustonmethodist.org

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• TMH Physician Associates PLLC

  • Ophthalmology Physician
  • Houston, TX
  • NPI 1275779225
  Medicare reassignment Care Compare group NPD
• University Professional Services

  • General Practice Physician
  • Portland, OR
  • NPI 1376709535
  Medicare reassignment Care Compare group
• University Professional Services

  dba OHSU Home Infusion Pharmacy

  • Pharmacy
  • Beaverton, OR
  • NPI 1073054714
  NPD
• University Professional Services

  dba Child Development & Rehabilitation Center in Portland

  • Multi-Specialty Clinic/Center
  • Portland, OR
  • NPI 1073767588
  NPD
• TMH Physician Associates PLLC

  • Orthopaedic Surgery Physician
  • Spring, TX
  • NPI 1043061351
  NPD

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Oregon Health & Science University

  • General Acute Care Hospital
  • Portland, OR
  • NPI 1609824010
  Care Compare affiliation
• Houston Methodist St. John Hospital

  dba Houston Methodist Clear Lake Hospital

  • General Acute Care Hospital
  • Houston, TX
  • NPI 1952723967
  Care Compare affiliation
• Methodist Health Centers

  dba Houston Methodist West Hospital

  • General Acute Care Hospital
  • Houston, TX
  • NPI 1083937593
  Care Compare affiliation
• Methodist Health Centers

  dba Houston Methodist The Woodlands Hospital

  • General Acute Care Hospital
  • The Woodlands, TX
  • NPI 1184179194
  Care Compare affiliation
• The Methodist Hospital

  dba Houston Methodist Hospital

  • General Acute Care Hospital
  • Houston, TX
  • NPI 1548387418
  Care Compare affiliation

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1413763200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1770768000000",
    "number": "1447654470",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1400 SW 5TH AVE STE 500",
            "city": "PORTLAND",
            "state": "OR",
            "postal_code": "972015537",
            "telephone_number": "866-617-6855",
            "fax_number": "503-346-8015"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3303 S BOND AVE",
            "city": "PORTLAND",
            "state": "OR",
            "postal_code": "972394501",
            "telephone_number": "503-494-6594",
            "fax_number": "503-494-5385"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1515 Holcombe Blvd",
            "address_purpose": "LOCATION",
            "city": "Houston",
            "state": "TX",
            "postal_code": "77030",
            "country_code": "US",
            "telephone_number": "713-792-6161",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "EFSTATHIOU",
        "first_name": "ELENI",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2014-10-20",
        "last_updated": "2026-02-11",
        "certification_date": "2026-02-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RX0202X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Medical Oncology",
            "state": "TX",
            "license": "44660",
            "primary": false
        },
        {
            "code": "207RX0202X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Medical Oncology",
            "state": "OR",
            "license": "MF229340",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BCBS",
            "identifier": "8EY946",
            "state": "TX"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "346893601",
            "state": "TX"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Victoria Ann Edwards, MS CCC-SLP
• Natasha Catherine Edwin, M.D.
• Katrina Eerkes
• Ell Em Eff
• Rachel Marian Effros, MD
• Debbie Louise Egan, RN
• Kaitlin Marie Egan, NNP-BC
• Lisa Anne Egan, PA
• Misty Lee Egan, B.A
• Rachel C Egan

• Medical Oncology Physician in Portland, OR
• Providers in Portland, OR by specialty
• Medical Oncology Physician in Oregon

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 11, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.