William Shyy, MD - Medicare Emergency Medicine in Santa Monica, CA

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William Shyy, MD is a medicare enrolled "Emergency Medicine" physician in Santa Monica, California. His current practice location is 1250 16th St, Santa Monica, California. You can reach out to his office (for appointments etc.) via phone at (310) 794-7700.

William Shyy is licensed to practice in California (license number A130299) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1013202274.

Contact Information

William Shyy, MD
1250 16th St,
Santa Monica, CA 90404-1249
(310) 794-7700
Not Available

Map and Direction




Physician's Profile

Full NameWilliam Shyy
GenderMale
SpecialityEmergency Medicine
Location1250 16th St, Santa Monica, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1013202274
  • Provider Enumeration Date: 06/16/2011
  • Last Update Date: 01/05/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 7911127170
  • Enrollment ID: I20141010000329

Medical Identifiers

Medical identifiers for William Shyy such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1013202274NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207P00000XEmergency Medicine 125-059672 (Illinois)Secondary
207P00000XEmergency Medicine A130299 (California)Primary

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 Shyy allows following entities to bill medicare on his behalf.
Entity NameRegents Of The University Of California
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1760552343
PECOS PAC ID: 4284547274
Enrollment ID: O20031106000389
Entity NameUniversity Of California Sfgh Medical Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1366417420
PECOS PAC ID: 5496668410
Enrollment ID: O20031112000551
Entity NameRegents Of The Univ Of Ca Emer Med
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1104889138
PECOS PAC ID: 4284538521
Enrollment ID: O20031119001020
Entity NameUniversity Of California San Francisco
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1861578973
PECOS PAC ID: 4486567229
Enrollment ID: O20031212000897
Entity NameUcsf Medical Group Business Services
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1477624104
PECOS PAC ID: 3779497870
Enrollment ID: O20040622001513

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 Shyy 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 Shyy, MD
5767 W Century Blvd Ste 400,
Los Angeles, CA 90045-5631

Ph: () -		William Shyy, MD
1250 16th St,
Santa Monica, CA 90404-1249

Ph: (310) 794-7700

Reviews and Comments


Emergency Medicine Doctors in Santa Monica, CA

Edward S Cotner, MD
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Practice Location: 1328 Twenty Second Street, Santa Monica, CA 90404
Phone: 310-582-7089    
Walid H. Ghurabi, D.O.
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Practice Location: 1250 16th St, Emergency Department, Santa Monica, CA 90404
Phone: 310-319-4000    
Dr. Michael Jeffrey Weitz, MD.
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Medicare: Medicare Enrolled
Practice Location: 1328 Twenty Second St, Santa Monica, CA 90404
Phone: 310-582-7089    
Dr. Robert Lee Hook Iii, M.D.
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 1250 16th St, Santa Monica, CA 90404
Phone: 310-794-7700    
Ms. Rosemarie Bustos Diaz,
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 1250 16th St, Santa Monica, CA 90404
Phone: 310-794-7700    
Amy L Kijner, PA
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Medicare: Not Enrolled in Medicare
Practice Location: 1328 22nd St, Santa Monica, CA 90404
Phone: 310-582-7089    

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.