NPIMap

Individual provider Active NPI

William Myron Ferrin, MD

  • Gastroenterology Physician
  • Oregon City, OR
National Provider Identifier
1568458156
Registry record updated Jul 13, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Gastroenterology PhysicianTaxonomy code 207RG0100X
License
MD17742 Issued in OR
Practice address
1508 Division St
Ste 15
Oregon City, OR 97045-1582
Phone
(503) 657-5555
Fax
(503) 657-6502
NPI assigned
Sep 20, 2005
Last updated
Jul 13, 2026By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 13, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Gastroenterology Physician 207RG0100X MD17742 OR Primary

Addresses

Primary practice location

1508 Division St
Ste 15
Oregon City, OR 97045-1582

Mailing address

1508 Division St
Ste 15
Oregon City, OR 97045-1582
Phone (503) 657-5555

Other identifiers 1

IdentifierTypeStateIssuer
043195MedicaidOR

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Not listed in the public Medicare enrollment file

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Not enrolled
HHS exclusion list flag
CMS’s directory marks this NPI as on an HHS exclusion list; no matching OIG record was found. The OIG exclusions file (LEIE) holds no record for this NPI, and the directory does not say which list the flag comes from. How exclusions are shown Confirm with the OIG exclusions search.
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
17742ORMDMassage Therapist

Practice roles

OrganizationSpecialtyStatusNew patients
Gastroenterology Specialists of Oregon PC Gastroenterology Past Accepting new patients
Pacific Digestive Associates Gastroenterology Past Accepting new patients
Pacific Digestive Associates, P.C. Past Accepting new patients

Organizations & group practices 3

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.

NPI Registry JSON

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

{
    "created_epoch": "1127174400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1568458156",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1508 DIVISION ST",
            "address_2": "STE 15",
            "city": "OREGON CITY",
            "state": "OR",
            "postal_code": "970451582",
            "telephone_number": "503-657-5555",
            "fax_number": "503-657-6502"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1508 DIVISION ST",
            "address_2": "STE 15",
            "city": "OREGON CITY",
            "state": "OR",
            "postal_code": "970451582",
            "telephone_number": "503-657-5555",
            "fax_number": "503-657-6502"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "FERRIN",
        "first_name": "WILLIAM",
        "middle_name": "MYRON",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-09-20",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "OR",
            "license": "MD17742",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "043195",
            "state": "OR"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Oregon City, OR

Sources for this page

  • 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.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.