Dr William W Wu, MD, PHD - Medicare Pathology in Ontario, CA

Dr William W Wu, MD, PHD is a medicare enrolled "Pathology - Anatomic Pathology & Clinical Pathology" physician in Ontario, California. He graduated from medical school in 2008 and has 16 years of diverse experience with area of expertise as Pathology. He is a member of the group practice Southern California Permanente Medical Group and his current practice location is 2295 S Vineyard Ave, Ontario, California. You can reach out to his office (for appointments etc.) via phone at (909) 724-3530.

Dr William W Wu is licensed to practice in California (license number A116068) 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 1720370109.

Contact Information

Dr William W Wu, MD, PHD
2295 S Vineyard Ave,
Ontario, CA 91761-7925
(909) 724-3530
(909) 724-3535

Map and Direction




Physician's Profile

Full NameDr William W Wu
GenderMale
SpecialityPathology
Experience16 Years
Location2295 S Vineyard Ave, Ontario, 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:
  • Dr William W Wu graduated from medical school in 2008
  NPI Data:
  • NPI Number: 1720370109
  • Provider Enumeration Date: 05/04/2011
  • Last Update Date: 04/14/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 9133435662
  • Enrollment ID: I20150828002247

Medical Identifiers

Medical identifiers for Dr William W Wu such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1720370109NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207ZP0102XPathology - Anatomic Pathology & Clinical Pathology 267829 (New York)Secondary
207ZP0102XPathology - Anatomic Pathology & Clinical Pathology A116068 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Kaiser Foundation Hospital Fontana/ontarioFontana, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Southern California Permanente Medical Group60027291758172

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. Dr William W Wu allows following entities to bill medicare on his behalf.
Entity NameSouthern California Permanente Medical Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1316979834
PECOS PAC ID: 6002729175
Enrollment ID: O20040126000823

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. Dr William W Wu 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
Dr William W Wu, MD, PHD
2295 S Vineyard Ave,
Ontario, CA 91761-7925

Ph: (909) 724-3530
Dr William W Wu, MD, PHD
2295 S Vineyard Ave,
Ontario, CA 91761-7925

Ph: (909) 724-3530

Reviews and Comments


Pathology Doctors in Ontario, CA


Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

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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