William W Tseng, MD - Medicare Surgical Oncology in Arcadia, CA

William W Tseng, MD is a medicare enrolled "Surgery - Surgical Oncology" physician in Arcadia, California. He went to Northwestern University Feinberg Medical School and graduated in 2004 and has 20 years of diverse experience with area of expertise as Surgical Oncology. He is a member of the group practice City Of Hope Medical Foundation and his current practice location is 301 W Huntington Dr Ste 400, Arcadia, California. You can reach out to his office (for appointments etc.) via phone at (626) 218-9840.

William W Tseng is licensed to practice in California (license number A94446) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1417071242.

Contact Information

William W Tseng, MD
301 W Huntington Dr Ste 400,
Arcadia, CA 91007-3471
(626) 218-9840
(626) 218-9860

Map and Direction




Physician's Profile

Full NameWilliam W Tseng
GenderMale
SpecialitySurgical Oncology
Experience20 Years
Location301 W Huntington Dr Ste 400, Arcadia, California
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • William W Tseng attended and graduated from Northwestern University Feinberg Medical School in 2004
  NPI Data:
  • NPI Number: 1417071242
  • Provider Enumeration Date: 03/19/2007
  • Last Update Date: 06/08/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 3678751526
  • Enrollment ID: I20140626001207

Medical Identifiers

Medical identifiers for William W Tseng such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1417071242NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
208600000XSurgery A94446 (California)Secondary
2086X0206XSurgery - Surgical Oncology A94446 (California)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
City Of Hope Medical Foundation3779751656686

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. William W Tseng allows following entities to bill medicare on his behalf.
Entity NameUsc Care Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1902846306
PECOS PAC ID: 0446157747
Enrollment ID: O20050512000412
Entity NameCity Of Hope Medical Foundation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1871886366
PECOS PAC ID: 3779751656
Enrollment ID: O20110720000244

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. William W Tseng is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
William W Tseng, MD
Po Box 512185,
Los Angeles, CA 90051-0185

Ph: () -
William W Tseng, MD
301 W Huntington Dr Ste 400,
Arcadia, CA 91007-3471

Ph: (626) 218-9840

Reviews and Comments


Surgery Doctors in Arcadia, CA

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Troy Lamar, MD
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Dr. Julius Wah Gee, DO
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Practice Location: 1032 Leandra Lane, Arcadia, CA 91006
Phone: 626-230-6582    

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Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

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