Timothy Thoai Nguyen, D.D.S.

Primary specialty

Oral and Maxillofacial Surgery (Dentist)Taxonomy code 1223S0112X

License

40381 Issued in CA

Practice address

991 Montague Expy Ste 102
Milpitas, CA 95035-6818

Phone

(408) 946-6666

Fax

(408) 935-8805

NPI assigned

Jun 6, 2007

Sex

Male

Sole proprietor

Yes

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

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.

Opted out of Medicare

Yes, effective Sep 30, 2025 through Sep 30, 2027

Medicare enrollment (NPD)

Not enrolled

State licenses

Practice roles

Interoperability endpoints

• Direct secure messaging: tnguyen11222@santaclaravalley.direct-ci.net

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.

• Timothy Thoai Nguyen D.D.S., Inc.

  • Oral and Maxillofacial Surgery (Dentist)
  • Milpitas, CA
  • NPI 1417306440
  NPD (past) Authorized official
• Timothy Thoai Nguyen DDS Inc.

  • Oral and Maxillofacial Surgery (Dentist)
  • Milpitas, CA
  • NPI 1063367878
  NPD (past)

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

{
    "created_epoch": "1181088000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1183852800000",
    "number": "1003019365",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "991 MONTAGUE EXPY STE 102",
            "city": "MILPITAS",
            "state": "CA",
            "postal_code": "950356818",
            "telephone_number": "408-946-6666",
            "fax_number": "408-935-8805"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "991 MONTAGUE EXPY STE 102",
            "city": "MILPITAS",
            "state": "CA",
            "postal_code": "950356818",
            "telephone_number": "408-946-6666",
            "fax_number": "408-935-8805"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "NGUYEN",
        "first_name": "TIMOTHY",
        "middle_name": "THOAI",
        "name_prefix": "Dr.",
        "credential": "D.D.S.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2007-06-06",
        "last_updated": "2007-07-08",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "1223S0112X",
            "taxonomy_group": "",
            "desc": "Dentist, Oral and Maxillofacial Surgery",
            "state": "CA",
            "license": "40381",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Theresa Anh Thu Nguyen
• Thi Quynh Nguyen, PHARM.D
• Thien-Loc Dao Nguyen, PHARMD
• Thuhien Thi Nguyen
• Thuy-Mai Nguyen, D.D.S.
• Trang D. Nguyen, M.D.
• Jessica Yih-Wen Nien, D.D.S.
• Nisha Dharmani, D.D.S., Inc.
• Cheryl Nisperos, MS, OTR/L
• Rachelle Nonan

• Oral and Maxillofacial Surgery (Dentist) in Milpitas, CA
• Providers in Milpitas, CA by specialty
• Oral and Maxillofacial Surgery (Dentist) in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 8, 2007; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring; Opt Out Affidavits.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.