Simon Y. Chang, M.D.

Primary specialty

Family Medicine PhysicianTaxonomy code 207Q00000X

License

A69205 Issued in CA

Practice address

10441 Lakewood Blvd Ste Ab
Downey, CA 90241-2744

Phone

(562) 869-1070

Fax

(562) 286-8777

NPI assigned

Aug 31, 2006

Last updated

Nov 15, 2025By the provider in NPPES

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Enrolled in CA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: schang207576@westdirect.optum.com

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.

• Careconnectmd Ca PC

  • Family Medicine Physician
  • Costa Mesa, CA
  • NPI 1366063125
  Medicare reassignment NPD
• GN Medical Associates, Inc.

  dba Gerinet Medical Associates

  • Family Medicine Physician
  • Costa Mesa, CA
  • NPI 1275576522
  Medicare reassignment NPD
• Healthcare Partners Affiliates Medical Group

  dba Optum

  • Internal Medicine Physician
  • Los Angeles, CA
  • NPI 1659312593

  Family Medicine

  Medicare reassignment NPD
• Healthcare Partners Affiliates Medical Group

  dba Optum

  • Durable Medical Equipment & Medical Supplies
  • Murrieta, CA
  • NPI 1760057269
  NPD

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

{
    "created_epoch": "1156982400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1763164800000",
    "number": "1760594097",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 35380",
            "city": "LAS VEGAS",
            "state": "NV",
            "postal_code": "891335380",
            "telephone_number": "702-579-3203"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "10441 LAKEWOOD BLVD STE AB",
            "city": "DOWNEY",
            "state": "CA",
            "postal_code": "902412744",
            "telephone_number": "562-869-1070",
            "fax_number": "562-286-8777"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "CHANG",
        "first_name": "SIMON",
        "middle_name": "Y.",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-08-31",
        "last_updated": "2025-11-15",
        "certification_date": "2025-11-15",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "CA",
            "license": "A69205",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00A692050",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Hsiangning Chang, MPT
• Jennifer Chang, PHARM D
• Juliana Chang
• Marie Grace Chang
• Miri Park Chang, FNP-BC
• Ellen Chanta
• Andrew Yuh Chao, D.O.
• Jerry Chao, PHARM.D.
• Linda Chao
• Charles Kodimer PHD Psychological

• Family Medicine Physician in Downey, CA
• Providers in Downey, CA by specialty
• Family Medicine Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 15, 2025; 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.