Stephen C Siegle, M.D.

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

A40032 Issued in CA

Practice address

4320 Maricopa St
Torrance, CA 90503-4314

Phone

(310) 214-0811

Fax

(310) 303-5901

NPI assigned

Apr 27, 2006

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

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Eligible to order & refer

• Part B services: No
• Medical equipment: Yes
• Home health: No
• Power mobility devices: Yes
• Hospice: No

Green means eligible to order or refer.

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

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.

• Healthcare Partners Affiliates Medical Group

  • Internal Medicine Physician
  • Los Angeles, CA
  • NPI 1659312593
  NPD
• Healthcare Partners Affiliates Medical Group

  • Durable Medical Equipment & Medical Supplies
  • Murrieta, CA
  • NPI 1760057269
  NPD
• Healthcare Partners Affiliates Medical Group

  • Addiction Medicine (Internal Medicine) Physician
  • Tustin, CA
  • NPI 1891981502
  NPD
• Davita Medical Group Talbert California, P.C.

  • Family Medicine Physician
  • Anaheim, CA
  • NPI 1477554012

  Internal Medicine

  NPD (past)
• Orange Coast Memorial Medical Center

  • General Acute Care Hospital
  • Fountain Valley, CA
  • NPI 1497702575
  NPD (past)
• Memorial Medical Group Inc

  • Durable Medical Equipment & Medical Supplies
  • Phoenix, AZ
  • NPI 1255523643
  NPD (past)

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

{
    "created_epoch": "1146096000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1821055302",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3330 LOMITA BLVD",
            "city": "TORRANCE",
            "state": "CA",
            "postal_code": "905055002",
            "telephone_number": "310-214-0811",
            "fax_number": "310-303-5901"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4320 MARICOPA ST",
            "city": "TORRANCE",
            "state": "CA",
            "postal_code": "905034314",
            "telephone_number": "310-214-0811",
            "fax_number": "310-303-5901"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SIEGLE",
        "first_name": "STEPHEN",
        "middle_name": "C",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-04-27",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "A40032",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• William Edwin Sibley
• Seemi Siddique, FNP
• Harpreet Sidhu, M.D.
• Lillian Sidky, MD
• Lance Sieger, M.D.
• Birgit Siekerkotte, M.D.
• Joshua Andrew Siembieda, M.D.
• Merly Sierra Rendon
• Chloie Camille Sierra, LCSW
• Leana Sierra

• Internal Medicine Physician in Torrance, CA
• Providers in Torrance, 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 Jul 13, 2026; 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.