William Shelton Chen, MD

Primary specialty

Radiation Oncology PhysicianTaxonomy code 2085R0001X

License

A183321 Issued in CA

Practice address

2425 Geary Blvd
San Francisco, CA 94115-3358

Phone

(415) 833-2000

NPI assigned

Apr 9, 2020

Last updated

Jun 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

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

Radiation Oncology

Education

Yale University School of Medicine, 2020

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

UCSF Medical Group Business ServicesGroup PAC ID 3779497870, 1,533 clinicians

University of California San FranciscoGroup PAC ID 4486567229, 1,780 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• UCSF Medical Center Hospital, San Francisco, CA, CCN 050454

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, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• UCSF Medical Group Business Services

  • Internal Medicine Physician
  • San Francisco, CA
  • NPI 1477624104
  Medicare reassignment Care Compare group NPD
• University of California San Francisco

  dba UCSF Pediatrics Group

  • Pediatrics Physician
  • San Francisco, CA
  • NPI 1861578973
  Medicare reassignment Care Compare group NPD
• UCSF Medical Group Business Services

  dba UCSF Orthotic and Prosthetic Center - Gateway Medical Building

  • Health Service Clinic/Center
  • San Francisco, CA
  • NPI 1194115246
  NPD
• University of California San Francisco

  dba UCSF Outpatient Pharmacy at Parnassus

  • Community/Retail Pharmacy
  • San Francisco, CA
  • NPI 1659141711
  NPD
• UCSF Dept of Surgery

  • Surgery Physician
  • San Francisco, CA
  • NPI 1477627537
  NPD (past)
• University of California San Francisco Medical Center

  dba UCSF Medical Center

  • General Acute Care Hospital
  • San Francisco, CA
  • NPI 1144325440
  NPD (past)

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

• University of California, San Francisco

  dba UCSF Medical Center

  • General Acute Care Hospital
  • San Francisco, CA
  • NPI 1689772592
  Care Compare affiliation

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

{
    "created_epoch": "1586390400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1749686400000",
    "number": "1316566367",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2425 GEARY BLVD",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941153358"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2425 GEARY BLVD",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941153358",
            "telephone_number": "415-833-2000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "CHEN",
        "first_name": "WILLIAM",
        "middle_name": "SHELTON",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2020-04-09",
        "last_updated": "2025-06-12",
        "certification_date": "2025-06-12",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "2085R0001X",
            "taxonomy_group": "",
            "desc": "Radiology, Radiation Oncology",
            "state": "CA",
            "license": "A183321",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Victor Eric Chen, MD, MPH
• Wanqing Chen
• Wayne Yiu Chen, PHARM.D.
• Wenyuan Chen
• William Cheng Chen, MD
• Wilson Chen, PHARMD
• Wu Chen
• XI Chen, MD
• Xialing Ann Chen
• Xin-Hua Chen, LCSW

• Radiation Oncology Physician in San Francisco, CA
• Providers in San Francisco, CA by specialty
• Radiation Oncology Physician in California

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