Thomas D. Brennan, MD

Primary specialty

Obstetrics & Gynecology PhysicianTaxonomy code 207V00000X

License

MD191851 Issued in OR

Practice address

9701 SW Barnes Rd Ste 200
Portland, OR 97225-6689

Phone

(503) 734-3700

Fax

(503) 473-8462

NPI assigned

Jun 26, 2013

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 1

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

Specialty

Obstetrics/Gynecology

Education

Oregon Health Sciences University School of Medicine, 2015

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Womens Healthcare Associates LLCGroup PAC ID 8527054014, 103 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Providence St Vincent Medical Center Hospital, Portland, OR, CCN 380004

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

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 and National Provider Directory roles.

• Women'S Healthcare Associates, LLC

  • Specialist
  • Portland, OR
  • NPI 1346296142

  OR

  Medicare reassignment Care Compare group NPD
• Women'S Healthcare Associates, LLC

  • Rural Health Clinic/Center
  • Newberg, OR
  • NPI 1922987460
  Care Compare group
• Northwest Urology, LLC

  • Specialist
  • Portland, OR
  • NPI 1629461397
  NPD (past)

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

• Providence Health & Services - Oregon

  • General Acute Care Hospital
  • Portland, OR
  • NPI 1114015971

  Hospital

  Care Compare affiliation

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

{
    "created_epoch": "1372204800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1769558400000",
    "number": "1831539634",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "7650 SW BEVELAND RD STE 200",
            "city": "PORTLAND",
            "state": "OR",
            "postal_code": "972238692",
            "telephone_number": "503-601-3615",
            "fax_number": "503-646-1683"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "9701 SW BARNES RD STE 200",
            "city": "PORTLAND",
            "state": "OR",
            "postal_code": "972256689",
            "telephone_number": "503-734-3700",
            "fax_number": "503-473-8462"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "BRENNAN",
        "first_name": "THOMAS",
        "middle_name": "D.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2013-06-26",
        "last_updated": "2026-01-28",
        "certification_date": "2026-01-28",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207V00000X",
            "taxonomy_group": "",
            "desc": "Obstetrics & Gynecology",
            "state": "OR",
            "license": "MD191851",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "500689019",
            "state": "OR"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Katherine Brennan
• Maureen Cecilia Brennan, LCSW
• Patrick Brennan
• Seth Andrew Brennan, RPH
• Tai Lyn Brennan
• Loren Brenner
• Brent Felnagle Psychology LLC
• Brent Frazee, MD, LLC
• Eric R. Brentlinger, M.D.
• Amy Rose Brenton, LMT

• All providers in Portland, OR
• Obstetrics & Gynecology Physician in Oregon

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 28, 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.