Long Beach Internal Medical Group, Inc. a Professional Corporation

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

Legal business name

LONG BEACH INTERNAL MEDICAL GROUP, INC. A PROFESSIONAL CORPORATION

Practice address

2650 Elm Ave Ste 307
Long Beach, CA 90806-1600

Phone

(562) 595-8549

Fax

(562) 492-6271

NPI assigned

May 22, 2007

Last updated

Feb 26, 2026By the provider in NPPES

Organization subpart

No

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

Authorized official

Name

Denise Perez

Title

Billing Manager

Phone

(562) 595-8549

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in CA

Enrollment records 1

These CMS records do not include an NPI. They are shown because their name and street address match this provider’s.

CLIA laboratory certificates

Interoperability endpoints

• FHIR API: https://fhir-api.fhirprod.aws.greenwayhealth.com/fhir/R4/2.16.840.1.113883.3.140.73195

Practitioners 2

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles, and the practitioner matching its NPPES authorized official.

• Stephen Hryniewicki, M.D.

  • Internal Medicine Physician
  • Long Beach, CA
  • NPI 1598871741
  Medicare reassignment NPD
• Danny Phu, M.D.

  • Internal Medicine Physician
  • Long Beach, CA
  • NPI 1518164094
  Medicare reassignment NPD

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

{
    "created_epoch": "1179792000000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1772064000000",
    "number": "1861601981",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2650 ELM AVE STE 307",
            "city": "LONG BEACH",
            "state": "CA",
            "postal_code": "908061600",
            "telephone_number": "562-595-8549",
            "fax_number": "562-492-6271"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2650 ELM AVE STE 307",
            "city": "LONG BEACH",
            "state": "CA",
            "postal_code": "908061600",
            "telephone_number": "562-595-8549",
            "fax_number": "562-492-6271"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "LONG BEACH INTERNAL MEDICAL GROUP, INC. A PROFESSIONAL CORPORATION",
        "organizational_subpart": "NO",
        "enumeration_date": "2007-05-22",
        "last_updated": "2026-02-26",
        "certification_date": "2026-02-26",
        "status": "A",
        "authorized_official_last_name": "PEREZ",
        "authorized_official_first_name": "DENISE",
        "authorized_official_title_or_position": "BILLING MANAGER",
        "authorized_official_telephone_number": "562-595-8549"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Internal Medicine",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Long Beach Healthcare Center LLC
• Long Beach Healthcare, LLC (Sunset Villa Post Acute)
• Long Beach Homemakers, Inc. (Oxford Healthcare)
• Long Beach Hospice Care Inc
• Long Beach Hospice Care, Inc.
• Long Beach Medispa Management, Inc.
• Long Beach Memorial Medical (Miller Childrens Pharmacy)
• Long Beach Memorial Medical (Infusion Care Pharmacy North)
• Long Beach Memorial Medical (Todd Cancer Pavilion Pharmacy)
• Long Beach Memorial Medical

• Internal Medicine Physician in Long Beach, CA
• Providers in Long Beach, CA by specialty
• Internal Medicine Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 26, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.