Andrea Tieng, MD Inc

Primary specialty

Gastroenterology PhysicianTaxonomy code 207RG0100X

License

A106477 Issued in CA

Legal business name

ANDREA TIENG, MD INC

Practice address

8283 Grove Ave Ste 206
Rancho Cucamonga, CA 91730-3141

Phone

(909) 255-7200

Fax

(909) 255-7215

NPI assigned

May 3, 2012

Organization subpart

No

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

Authorized official

Name

Dr. Andrea S. TiengNPI 1356528566

Title

MD

Phone

(909) 255-7200

Specialties & licenses 1

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Enrolled in CA

Enrollment records 1

Locations

Practitioners 1

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

• Andrea S. Tieng, M.D.

  • Gastroenterology Physician
  • Rancho Cucamonga, CA
  • NPI 1356528566
  Medicare reassignment NPD Authorized official

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

{
    "created_epoch": "1336003200000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1783123200000",
    "number": "1013276575",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "8283 GROVE AVE STE 206",
            "city": "RANCHO CUCAMONGA",
            "state": "CA",
            "postal_code": "917303141",
            "telephone_number": "909-255-7200",
            "fax_number": "909-255-7215"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "8283 GROVE AVE STE 206",
            "city": "RANCHO CUCAMONGA",
            "state": "CA",
            "postal_code": "917303141",
            "telephone_number": "909-255-7200",
            "fax_number": "909-255-7215"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "ANDREA TIENG, MD INC",
        "organizational_subpart": "NO",
        "enumeration_date": "2012-05-03",
        "last_updated": "2026-07-04",
        "certification_date": "2026-07-04",
        "status": "A",
        "authorized_official_last_name": "TIENG",
        "authorized_official_first_name": "ANDREA",
        "authorized_official_middle_name": "S.",
        "authorized_official_title_or_position": "MD",
        "authorized_official_telephone_number": "909-255-7200",
        "authorized_official_name_prefix": "Dr."
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "CA",
            "license": "A106477",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "PERSONAL NPI",
            "identifier": "1356528566",
            "state": null
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Sheldon Troy Anderson, PH.D.
• Roberto Andrada
• Brandon Andrade-Pareja
• Pricila Andrade
• Saul Andrade
• Andreana Mabry, Licensed Marriage and Family Therapist
• Yasmine Andres
• Mia Rae Andrews
• Michael Bryan Andrews, D.C
• Chinwe Julian Anekwe

• Gastroenterology Physician in Rancho Cucamonga, CA
• Providers in Rancho Cucamonga, CA by specialty
• Gastroenterology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 4, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.