William S Treloar, DO

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

DO26167 Issued in OR

Practice address

2700 NW Stewart Pkwy
Roseburg, OR 97470-1281

Phone

(541) 677-4313

Fax

(541) 677-4533

NPI assigned

Jan 27, 2006

Last updated

Jul 13, 2026By the provider in NPPES

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other identifiers 2

Medicare fee-for-service enrollment

Enrolled in OR

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 1

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

Practice roles

Locations

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.

• Mary's Peak Emergency Physicians

  • Emergency Medicine Physician
  • Corvallis, OR
  • NPI 1194733360
  Medicare reassignment NPD

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

{
    "created_epoch": "1138320000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1174594360",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2700 NW STEWART PKWY",
            "city": "ROSEBURG",
            "state": "OR",
            "postal_code": "974701281",
            "telephone_number": "541-677-4313",
            "fax_number": "541-677-4533"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2700 NW STEWART PKWY",
            "city": "ROSEBURG",
            "state": "OR",
            "postal_code": "974701281",
            "telephone_number": "541-677-4313",
            "fax_number": "541-677-4533"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "TRELOAR",
        "first_name": "WILLIAM",
        "middle_name": "S",
        "credential": "DO",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-01-27",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "OR",
            "license": "DO26167",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "RAILROAD",
            "identifier": "P00265023",
            "state": "OR"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "026816",
            "state": "OR"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Eve Marie Traill, PA-C
• Thomas Tran, AU.D.
• Tu D Tran, DDS
• Zakary Trapp
• Heather Marie Trautz, RNFA
• Kenneth Trieu
• Carmine Tringolo, RN, CRNFA
• Rebekah Anne Tripp
• Steven F Tronnes, OD
• Adam Levi Trotta, MD

• Emergency Medicine Physician in Roseburg, OR
• Providers in Roseburg, OR by specialty
• Emergency Medicine Physician in Oregon

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.