Internal Medicine Medical Group

Primary specialty

Endocrinology, Diabetes & Metabolism PhysicianTaxonomy code 207RE0101X

Legal business name

INTERNAL MEDICINE MEDICAL GROUP

Practice address

16465 Sierra Lakes Parkway
Internal Medicine Medical Group Suite
Fontana, CA 92336-1242

Phone

(909) 770-8640

Fax

(909) 770-8650

NPI assigned

Jun 6, 2007

Organization subpart

No

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

Authorized official

Name

Mrs. Adrienne Marie Walker

Title

Contracts Manager

Phone

(909) 398-1550

Specialties & licenses 2

Addresses

Tax ID family

Internal Medicine Medical Group6 organizations share this tax ID, including this one

Other organizations with this tax ID 5

Organizations that report the same tax identification number in the National Provider Directory.

• Internal Medicine Medical Group

  • Endocrinology, Diabetes & Metabolism Physician
  • Pomona, CA
  • NPI 1114120417
  NPD tax ID
• Internal Medicine Medical Group

  • Family Medicine Physician
  • Rancho Cucamonga, CA
  • NPI 1144423468
  NPD tax ID
• Internal Medicine Medical Group

  • Family Medicine Physician
  • Pomona, CA
  • NPI 1225231525
  NPD tax ID
• Internal Medicine Medical Group

  • Internal Medicine Physician
  • Pomona, CA
  • NPI 1316140619
  NPD tax ID
• Internal Medicine Medical Group

  • Internal Medicine Physician
  • Chino Hills, CA
  • NPI 1679776090
  NPD tax ID

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

{
    "created_epoch": "1181088000000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1757548800000",
    "number": "1164625588",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "840 TOWNE CENTER DRIVE",
            "address_2": "INTERNAL MEDICINE MEDICAL GROUP",
            "city": "POMONA",
            "state": "CA",
            "postal_code": "917675900",
            "telephone_number": "909-398-1550",
            "fax_number": "909-398-1573"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "16465 SIERRA LAKES PARKWAY",
            "address_2": "INTERNAL MEDICINE MEDICAL GROUP SUITE",
            "city": "FONTANA",
            "state": "CA",
            "postal_code": "923361242",
            "telephone_number": "909-770-8640",
            "fax_number": "909-770-8650"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "INTERNAL MEDICINE MEDICAL GROUP",
        "organizational_subpart": "NO",
        "enumeration_date": "2007-06-06",
        "last_updated": "2025-09-11",
        "status": "A",
        "authorized_official_last_name": "WALKER",
        "authorized_official_first_name": "ADRIENNE",
        "authorized_official_middle_name": "MARIE",
        "authorized_official_title_or_position": "CONTRACTS MANAGER",
        "authorized_official_telephone_number": "909-398-1550",
        "authorized_official_name_prefix": "Mrs."
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Internal Medicine",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207RE0101X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Internal Medicine, Endocrinology, Diabetes & Metabolism",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Inland Physical Therapy and Spine Center, PC
• Jerrelyn Javier Inocencio-Diaz, MD
• Integrated Family Enrichment Services
• Herman Ip, RPH
• Khosro Michael Iromloo, M.D.
• Isabel Correa DDS, Inc. (Comfort Dental Care)
• Vanessa Quynh Ishida, OD
• Christina H Isinhue, PHARM. D.

• Endocrinology, Diabetes & Metabolism Physician in Fontana, CA
• Providers in Fontana, CA by specialty
• Endocrinology, Diabetes & Metabolism Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 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.