Oliver Winslow Graumann, DDS

Primary specialty

DentistTaxonomy code 122300000X

License

D12190 Issued in OR

Practice address

1890 NE 162ND Ave
Portland, OR 97230-5642

Phone

(503) 257-9836

NPI assigned

Jun 16, 2025

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

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

State licenses

Practice roles

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.

• Portland Dental Associates PC

  • Dental Clinic/Center
  • Portland, OR
  • NPI 1518090323
  NPD (past)

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

{
    "created_epoch": "1750032000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1762560000000",
    "number": "1801782008",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "8327 NE HOLLADAY ST",
            "city": "PORTLAND",
            "state": "OR",
            "postal_code": "972205822"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1890 NE 162ND AVE",
            "city": "PORTLAND",
            "state": "OR",
            "postal_code": "972305642",
            "telephone_number": "503-257-9836"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GRAUMANN",
        "first_name": "OLIVER",
        "middle_name": "WINSLOW",
        "name_prefix": "Dr.",
        "credential": "DDS",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2025-06-16",
        "last_updated": "2025-11-08",
        "certification_date": "2025-11-08",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "122300000X",
            "taxonomy_group": "",
            "desc": "Dentist",
            "state": "OR",
            "license": "D12190",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Ryan I Grattan, MD
• Gina Gratza, LMFT
• Sherry Grau
• Susan E Grauer, MD
• Christian Graulty, MD
• Carly Jane King Gravel
• Marie Nathalie France Gravel, D.C.
• Rory Kai Gravelle
• Polly Gravely, M.S., LPC
• Megan Elisabeth Gravelyn, PA-C

• Dentist in Portland, OR
• Providers in Portland, OR by specialty
• Dentist in Oregon

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 8, 2025; 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.