Aaron M. Williams, D.D.S.

Primary specialty

DentistTaxonomy code 122300000X

License

DDS-10408 Issued in IA

Practice address

4224 Sergeant Rd
Sioux City, IA 51106-4600

Phone

(712) 276-2766

NPI assigned

Feb 9, 2012

Last updated

Jan 20, 2026By the provider in NPPES

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 4

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

State licenses

Practice roles

Locations

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.

• Siouxland Orthodontics PLLC

  • Orthodontics and Dentofacial Orthopedics Dentistry
  • Sioux City, IA
  • NPI 1457219743
  NPD Authorized official
• Daniel L Kaler DDS PC

  • Orthodontics and Dentofacial Orthopedics Dentistry
  • Sioux City, IA
  • NPI 1821199357
  NPD (past)
• Ronald H. Ellingsen, PLLC

  • Orthodontics and Dentofacial Orthopedics Dentistry
  • Spokane, WA
  • NPI 1013658087
  NPD (past)
• Ronald H. Ellingsen, PLLC

  dba Hi 5 Orthodontics

  • Orthodontics and Dentofacial Orthopedics Dentistry
  • Spokane, WA
  • NPI 1215777057
  NPD (past)

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

{
    "created_epoch": "1328745600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1768867200000",
    "number": "1366715120",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4224 SERGEANT RD",
            "city": "SIOUX CITY",
            "state": "IA",
            "postal_code": "511064600",
            "telephone_number": "712-276-2766"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4224 SERGEANT RD",
            "city": "SIOUX CITY",
            "state": "IA",
            "postal_code": "511064600",
            "telephone_number": "712-276-2766"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "2801 Outer Dr N",
            "address_purpose": "LOCATION",
            "city": "Sioux City",
            "state": "IA",
            "postal_code": "511041597",
            "country_code": "US",
            "telephone_number": "712-239-0420",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "405 Plymouth St NW",
            "address_purpose": "LOCATION",
            "city": "Le Mars",
            "state": "IA",
            "postal_code": "510313438",
            "country_code": "US",
            "telephone_number": "712-546-5179",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "617 N Pearl St Ste 2",
            "address_purpose": "LOCATION",
            "city": "Wayne",
            "state": "NE",
            "postal_code": "687871908",
            "country_code": "US",
            "telephone_number": "402-375-4363",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "WILLIAMS",
        "first_name": "AARON",
        "middle_name": "M.",
        "name_prefix": "Dr.",
        "credential": "D.D.S.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2012-02-09",
        "last_updated": "2026-01-20",
        "certification_date": "2026-01-20",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "122300000X",
            "taxonomy_group": "",
            "desc": "Dentist",
            "state": "SD",
            "license": "D1504",
            "primary": false
        },
        {
            "code": "122300000X",
            "taxonomy_group": "",
            "desc": "Dentist",
            "state": "IA",
            "license": "DDS-10408",
            "primary": true
        },
        {
            "code": "122300000X",
            "taxonomy_group": "",
            "desc": "Dentist",
            "state": "NE",
            "license": "7137",
            "primary": false
        },
        {
            "code": "1223X0400X",
            "taxonomy_group": "",
            "desc": "Dentist, Orthodontics and Dentofacial Orthopedics",
            "state": "WA",
            "license": "DE60453832",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Linda Wieseler, MSE
• Macey Lynn Wignall
• Robert Alfred Wikstrom
• Kourtney L Wilcox, ARNP
• Clifford W Wilkinson, PA-C
• Nitausha Ann Williams, LMSW
• Troyja Williams
• Mary Michelle Wilson, MSN, ARNP, FNP-BC
• Meagan Wilson
• Kendra Nicole Windeshausen

• Dentist in Sioux City, IA
• Providers in Sioux City, IA by specialty
• Dentist in Iowa

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 20, 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.