Individual provider Active NPI

Mark Houston, DMD

  • Endodontics
  • Tigard, OR
National Provider Identifier
1801312145
Registry record updated Jul 5, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
EndodonticsTaxonomy code 1223E0200X
License
D12142 Issued in OR
Practice address
7275 SW Dartmouth St Ste 180
Tigard, OR 97223-8292
Phone
(503) 620-2319
NPI assigned
Aug 18, 2017
Sex
Male
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Jul 5, 2025

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
EndodonticsGroup: 193400000X SINGLE SPECIALTY GROUP 1223E0200X D12142 OR Primary

Addresses

Primary practice location

7275 SW Dartmouth St Ste 180
Tigard, OR 97223-8292

Mailing address

10800 SE 5TH St Unit E17
Vancouver, WA 98664-4633
Phone (044) 793-9509

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

State licenses

LicenseStateTypeSpecialty
D12142ORMDEndodontist

Practice roles

OrganizationSpecialtyStatusNew patients
Tigard Triangle Smiles, PC PastSince Jul 9, 2025 Accepting new patients

Organizations & group practices 1

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.

NPI Registry JSON

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

{
    "created_epoch": "1503014400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1751673600000",
    "number": "1801312145",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "10800 SE 5TH ST UNIT E17",
            "city": "VANCOUVER",
            "state": "WA",
            "postal_code": "986644633",
            "telephone_number": "044-793-9509"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "7275 SW DARTMOUTH ST STE 180",
            "city": "TIGARD",
            "state": "OR",
            "postal_code": "972238292",
            "telephone_number": "503-620-2319"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HOUSTON",
        "first_name": "MARK",
        "credential": "DMD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2017-08-18",
        "last_updated": "2025-07-05",
        "certification_date": "2025-07-05",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "1223E0200X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Dentist, Endodontics",
            "state": "OR",
            "license": "D12142",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Tigard, OR

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 5, 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.