Individual provider Active NPI

Mark Joseph Williamson, DDS

  • General Practice Dentistry
  • San Antonio, TX
National Provider Identifier
1851844260
Registry record updated Apr 29, 2026
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Key facts

NPPES NPI Registry
Primary specialty
General Practice DentistryTaxonomy code 1223G0001X
License
32216 Issued in TX
Practice address
3355 Cherry Ridge St Ste 216
San Antonio, TX 78230-4818
Phone
(210) 341-2569
NPI assigned
Aug 2, 2016
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Apr 29, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
General Practice Dentistry 1223G0001X 32216 TX Primary

Addresses

Primary practice location

3355 Cherry Ridge St Ste 216
San Antonio, TX 78230-4818

Mailing address

3355 Cherry Ridge St Ste 216
San Antonio, TX 78230-4818
Phone (512) 689-9174

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in TX
Eligible to order & refer
  • Part B services: Yes
  • Medical equipment: Yes
  • Home health: Yes
  • Power mobility devices: No
  • Hospice: Yes
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20191217002443 TX Order and Referring Only - DentistPractitioner - Dentist 9638503022

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled

NPI Registry JSON

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

{
    "created_epoch": "1470096000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1777420800000",
    "number": "1851844260",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3355 CHERRY RIDGE ST STE 216",
            "city": "SAN ANTONIO",
            "state": "TX",
            "postal_code": "782304818",
            "telephone_number": "512-689-9174"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3355 CHERRY RIDGE ST STE 216",
            "city": "SAN ANTONIO",
            "state": "TX",
            "postal_code": "782304818",
            "telephone_number": "210-341-2569"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WILLIAMSON",
        "first_name": "MARK",
        "middle_name": "JOSEPH",
        "name_prefix": "Dr.",
        "credential": "DDS",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2016-08-02",
        "last_updated": "2026-04-29",
        "certification_date": "2026-04-29",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "1223G0001X",
            "taxonomy_group": "",
            "desc": "Dentist, General Practice",
            "state": "TX",
            "license": "32216",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in San Antonio, TX

Sources for this page

Verify at the official NPI Registry.