William Spencer Lewis, MD - Medicare Otolaryngology in Los Gatos, CA

William Spencer Lewis, MD is a medicare enrolled "Otolaryngology" physician in Los Gatos, California. He went to University Of Southern California Keck School Of Medicine and graduated in 1986 and has 38 years of diverse experience with area of expertise as Otolaryngology. He is a member of the group practice Stanford Health Care and his current practice location is 15861 Winchester Blvd, Los Gatos, California. You can reach out to his office (for appointments etc.) via phone at (408) 395-6121.

William Spencer Lewis is licensed to practice in California (license number G62557) 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 1871585059.

Contact Information

William Spencer Lewis, MD
15861 Winchester Blvd,
Los Gatos, CA 95030-3306
(408) 395-6121
(408) 395-6127

Map and Direction




Physician's Profile

Full NameWilliam Spencer Lewis
GenderMale
SpecialityOtolaryngology
Experience38 Years
Location15861 Winchester Blvd, Los Gatos, 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 Spencer Lewis attended and graduated from University Of Southern California Keck School Of Medicine in 1986
  NPI Data:
  • NPI Number: 1871585059
  • Provider Enumeration Date: 08/16/2005
  • Last Update Date: 04/29/2024
  Medicare PECOS Information:
  • PECOS PAC ID: 9335263508
  • Enrollment ID: I20100825000896

Medical Identifiers

Medical identifiers for William Spencer Lewis such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1871585059NPI-NPPES
00G625571MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207Y00000XOtolaryngology G62557 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Stanford Health CareStanford, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Stanford Health Care67097974912579

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 Spencer Lewis allows following entities to bill medicare on his behalf.
Entity NameStanford Health Care
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1437292927
PECOS PAC ID: 6709797491
Enrollment ID: O20031124000348
Entity NameUniversity Healthcare Alliance
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1760531198
PECOS PAC ID: 6305748799
Enrollment ID: O20040126000292

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 Spencer Lewis 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 Spencer Lewis, MD
15861 Winchester Blvd,
Los Gatos, CA 95030-3306

Ph: (408) 395-6121
William Spencer Lewis, MD
15861 Winchester Blvd,
Los Gatos, CA 95030-3306

Ph: (408) 395-6121

Reviews and Comments


Otolaryngology Doctors in Los Gatos, CA

Dr. George L. Shoptaw, M.D.
Otolaryngology
Medicare: Not Enrolled in Medicare
Practice Location: 700 W Parr Ave, Suite B, Los Gatos, CA 95032
Phone: 408-374-7880    Fax: 408-374-4097
Sudeep Roy, MD
Otolaryngology
Medicare: Not Enrolled in Medicare
Practice Location: 800 Pollard Rd Ste A, Los Gatos, CA 95032
Phone: 408-688-2082    Fax: 408-866-4270
Dr. Philip T. Ho, M.D.
Otolaryngology
Medicare: Accepting Medicare Assignments
Practice Location: 700 W Parr Ave, Suite B, Los Gatos, CA 95032
Phone: 408-379-8228    Fax: 408-379-8558
David Paul Arnstein, MD
Otolaryngology
Medicare: Accepting Medicare Assignments
Practice Location: 15861 Winchester Blvd, Los Gatos, CA 95030
Phone: 408-395-6121    Fax: 408-395-6127
Rom Rodney Karin, MD
Otolaryngology
Medicare: Accepting Medicare Assignments
Practice Location: 15861 Winchester Blvd, Los Gatos, CA 95030
Phone: 408-395-6121    Fax: 408-395-6127
Abraham Zachariah, MD
Otolaryngology
Medicare: Not Enrolled in Medicare
Practice Location: 555 Knowles Drive, Suite 117, Los Gatos, CA 95032
Phone: 408-374-5070    Fax: 408-374-0373

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).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.