Sean Spencer London, MD

Primary specialty

Body Imaging PhysicianTaxonomy code 2085B0100X

License

161034 Issued in CA

Practice address

18436 Roscoe Blvd
Northridge, CA 91325-4107

Phone

(818) 435-1400

NPI assigned

Jun 28, 2013

Last updated

Nov 12, 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 2

Addresses

Electronic endpoints 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

Specialty

Diagnostic Radiology

Education

Other, 2013

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Medical Diagnostic Imaging LLCGroup PAC ID 0042107641, 13 clinicians

Marshfield Clinic IncGroup PAC ID 2264345206, 207 clinicians

Milwaukee Radiologists LTDGroup PAC ID 7113915810, 16 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Ascension SE Wisconsin Hospital Hospital, Milwaukee, WI, CCN 520136
• Marshfield Medical Center - Beaver Dam (MMC-BD) Hospital, Beaver Dam, WI, CCN 520076
• Marshfield Medical Center - Rice Lake Hospital, Rice Lake, WI, CCN 520011
• Marshfield Medical Center - Minocqua Hospital, Minocqua, WI, CCN 520212

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations (25 of 35)

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.

• Marshfield Clinic Inc

  dba Marshfield Clinic Florida Teleradiology/Telehealth

  • Clinic/Center
  • Marshfield, WI
  • NPI 1952347981

  CA

  Medicare reassignment Care Compare group NPD
• Medical Diagnostic Imaging LLC

  • Diagnostic Radiology Physician
  • Greenfield, WI
  • NPI 1427165331

  CA

  Medicare reassignment Care Compare group NPD
• Milwaukee Radiologists LTD

  • Diagnostic Radiology Physician
  • Greenfield, WI
  • NPI 1568564904

  CA

  Medicare reassignment Care Compare group NPD
• Health Diagnostics of California a Professional Corporation

  dba Simonmed Imaging

  • Diagnostic Radiology Physician
  • Mountain View, CA
  • NPI 1104321959
  Medicare reassignment NPD
• Renaissance Imaging Medical Associates, Inc.

  • Diagnostic Radiology Physician
  • Northridge, CA
  • NPI 1487608931

  Body Imaging

  Medicare reassignment NPD
• Howard Simon MD PLLC

  dba Simonmed Imaging

  • Diagnostic Radiology Physician
  • Chicago, IL
  • NPI 1659930998

  CA

  Medicare reassignment NPD
• Health Diagnostics of California a Professional Corporation

  • Diagnostic Radiology Physician
  • Redlands, CA
  • NPI 1710518535
  NPD
• Health Diagnostics of California LLC

  • Diagnostic Radiology Physician
  • Los Gatos, CA
  • NPI 1982966172
  NPD (past)

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Ascension SE Wisconsin Hospital, Inc

  dba Ascension SE Wisconsin Hospital-Elmbrook Campus

  • General Acute Care Hospital
  • Milwaukee, WI
  • NPI 1427007384
  Care Compare affiliation
• Ascension SE Wisconsin Hospital, Inc

  dba Ascension SE Wisconsin Hospital-Elmbrook Campus

  • Rehabilitation Hospital Unit
  • Brookfield, WI
  • NPI 1861417362
  Care Compare affiliation
• Beaver Dam Community Hospitals Inc

  dba Marshfield Medical Center - Beaver Dam

  • General Acute Care Hospital
  • Beaver Dam, WI
  • NPI 1023187416
  Care Compare affiliation
• Beaver Dam Community Hospitals Inc

  dba (Inactive) Marshfield Medical Center - Beaver Dam Specialty Clinic

  • Clinic/Center
  • Beaver Dam, WI
  • NPI 1508184896

  Hospital

  Care Compare affiliation
• Lakeview Medical Center Inc of Rice Lake

  dba Marshfield Medical Center - Rice Lake

  • Rural Acute Care Hospital
  • Rice Lake, WI
  • NPI 1154415024
  Care Compare affiliation
• MCHS Hospitals Inc

  dba Marshfield Medical Center - Minocqua

  • Rural Acute Care Hospital
  • Minocqua, WI
  • NPI 1376197665
  Care Compare affiliation

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

{
    "created_epoch": "1372377600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1762905600000",
    "number": "1043650443",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1460 PASTEL LN STE 400",
            "city": "NOVATO",
            "state": "CA",
            "postal_code": "949474524",
            "telephone_number": "415-847-5850",
            "fax_number": "303-318-2481"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "18436 ROSCOE BLVD",
            "city": "NORTHRIDGE",
            "state": "CA",
            "postal_code": "913254107",
            "telephone_number": "818-435-1400"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1960 Ogden St",
            "address_2": "Suite 400",
            "address_purpose": "LOCATION",
            "city": "Denver",
            "state": "CO",
            "postal_code": "802183666",
            "country_code": "US",
            "telephone_number": "303-318-1540",
            "fax_number": "303-318-2481",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1000 N Oak Ave",
            "address_purpose": "LOCATION",
            "city": "Marshfield",
            "state": "WI",
            "postal_code": "544495703",
            "country_code": "US",
            "telephone_number": "715-387-5511",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "LONDON",
        "first_name": "SEAN",
        "middle_name": "SPENCER",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2013-06-28",
        "last_updated": "2025-11-12",
        "certification_date": "2025-11-12",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2085B0100X",
            "taxonomy_group": "",
            "desc": "Radiology, Body Imaging",
            "state": "WI",
            "license": "63106",
            "primary": false
        },
        {
            "code": "2085B0100X",
            "taxonomy_group": "",
            "desc": "Radiology, Body Imaging",
            "state": "CA",
            "license": "161034",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "him@marshfieldclinichealthsystem.cernerdirect.com",
            "affiliation": "N",
            "use": "HIE",
            "useDescription": "Health Information Exchange (HIE)",
            "address_1": "1000 N Oak Ave",
            "city": "Marshfield",
            "state": "WI",
            "country_code": "US",
            "postal_code": "544495703",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Bjorn Mark Lobo, M.D.
• Dannielle Locke
• Graciela Logrippo
• Ashley Lombardi
• Anjali Londhe, PHARMD
• Chrystal Long
• Yvette Lopez de Luna
• Patricia Lopez de Victoria Villaverde
• Lopez-Rullamas Chiropractic Inc (Chiro Haven)
• Maria Anjoline Lopez-Rullamas, D.C.

• Body Imaging Physician in Northridge, CA
• Providers in Northridge, CA by specialty
• Body Imaging Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 12, 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.
• 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.