Ian Holmes, MD

Primary specialty

Gastroenterology PhysicianTaxonomy code 207RG0100X

License

MD204232 Issued in OR

Practice address

1111 NE 99TH Ave Ste 301
Portland, OR 97220-9442

Phone

(503) 963-2707

Fax

(503) 963-2802

NPI assigned

Apr 17, 2014

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

Electronic endpoints 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

Gastroenterology

Education

Other, 2014

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

The Oregon Clinic, PCGroup PAC ID 2860390408, 353 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Providence Portland Medical Center Hospital, Portland, OR, CCN 380061
• Adventist Health Portland Hospital, Portland, OR, CCN 380060
• Providence Milwaukie Hospital Hospital, Milwaukie, OR, CCN 380082
• Legacy Mount Hood Medical Center Hospital, Gresham, OR, CCN 380025

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Interoperability endpoints

• Direct secure messaging: iholmes1705122@oc.providencedirect.org

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.

• The Oregon Clinic PC

  • Specialist
  • Portland, OR
  • NPI 1265417174
  Medicare reassignment Care Compare group
• Providence Health & Services - Oregon

  • General Acute Care Hospital
  • Portland, OR
  • NPI 1003991845
  NPD (past)

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

• Legacy Mount Hood Medical Center

  • General Acute Care Hospital
  • Gresham, OR
  • NPI 1255354700
  Care Compare affiliation
• Portland Adventist Medical Center

  • General Acute Care Hospital
  • Portland, OR
  • NPI 1801887658
  Care Compare affiliation
• Providence Health & Services - Oregon

  • General Acute Care Hospital
  • Portland, OR
  • NPI 1003991845
  Care Compare affiliation
• Providence Health & Services - Oregon

  • Case Manager/Care Coordinator
  • Portland, OR
  • NPI 1891822995

  Hospital

  Care Compare affiliation
• Providence Health & Services Oregon

  • General Acute Care Hospital
  • Milwaukie, OR
  • NPI 1366536963
  Care Compare affiliation

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

{
    "created_epoch": "1397692800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1765843200000",
    "number": "1073933099",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "541 NE 20TH AVE STE 225",
            "city": "PORTLAND",
            "state": "OR",
            "postal_code": "972322895",
            "telephone_number": "503-963-2801",
            "fax_number": "503-963-2825"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1111 NE 99TH AVE STE 301",
            "city": "PORTLAND",
            "state": "OR",
            "postal_code": "972209442",
            "telephone_number": "503-963-2707",
            "fax_number": "503-963-2802"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "9300 SE 91st Ave Ste 300",
            "address_purpose": "LOCATION",
            "city": "Happy Valley",
            "state": "OR",
            "postal_code": "970863762",
            "country_code": "US",
            "telephone_number": "503-963-2707",
            "fax_number": "503-963-2802",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "HOLMES",
        "first_name": "IAN",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2014-04-17",
        "last_updated": "2025-12-16",
        "certification_date": "2025-12-16",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "OR",
            "license": "MD204232",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "500791915",
            "state": "OR"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "2176196",
            "state": "WA"
        }
    ],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "cc_otoc_gastro_east_front_desk_pool12223282@oc.providencedirect.org",
            "affiliation": "Y",
            "affiliationName": "The Oregon Clinic PC",
            "address_1": "1111 NE 99th Ave Ste 301",
            "city": "Portland",
            "state": "OR",
            "country_code": "US",
            "postal_code": "972209442",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Brooke Marie Erspamer Holmes, MD
• Charlotte Marie Holmes
• Cortney Holmes, RN
• Crane J Holmes, ND
• Elizabeth A Holmes, AGNP-BC
• Jennifer Cork Holmes, DVM
• Kathryn Wood Holmes, M.D.
• Kiante Holmes
• Lauren Holmes
• Lauren Rebecca Holmes, P.A.-C

• Gastroenterology Physician in Portland, OR
• Providers in Portland, OR by specialty
• Gastroenterology Physician in Oregon

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 16, 2025; 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.